RINA Steel Plate For Hull Building

RINA Steel Plate For Hull Building

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RINA steel plates are marine-grade structural steels certificated by Registro Italiano Navale (RINA), primarily used in the shipbuilding and offshore industries.

 

Common RINA grades, such as Grade A, are general-strength ship plates with a minimum yield strength of 235 MPa (34,100 psi) and are suitable for ship structures, marine equipment, and oil drilling platforms.

 

These plates are classified according to strength and must resist corrosion in marine environments.

 

 

RINA steel plates are a type of marine steel used for structural components in ships and other offshore structures.

They are certified by RINA (Registro Italiano Navale), an Italian classification society for ships and marine structures.

These plates are made from carbon and alloy steels designed to withstand the corrosive conditions of a marine environment.

 

RINA certifies both normal-strength and high-strength grades of steel plate.

 

Normal-strength RINA grades

Normal-strength steel is categorized into four grades (A, B, D, and E), with Grade A being the most common.

Grade A:

Lowest of the four grades.

Yield strength: 34,100 psi (235 MPa).

Tensile strength: 58,000–75,500 psi (400–520 MPa).

Grades B, D, and E: Offer higher toughness and performance, particularly at low temperatures, making them suitable for use in colder environments.

 

High-strength RINA grades

High-strength grades are identified by a letter (A, D, E, or F) followed by a number that indicates the yield strength.

Applications: High-strength steel is used for large-scale ships and high-stress applications.

Common grades: Include AH32, DH32, EH32, AH36, DH36, EH36, and AH40.

Properties: Require specific production methods, such as controlled rolling or heat treatment, to achieve superior toughness and weldability.

Alloying: Micro-alloying with elements like Niobium (Nb), Vanadium (V), and Titanium (Ti) is used to refine grain structure and improve toughness.

 

Uses of RINA steel plate

Ship hulls: The main structural application for RINA-certified plates.

Marine equipment: Used for cranes, barges, and other vessel components.

Offshore platforms: Provides structural integrity for offshore drilling platforms.

Ship repair: Utilized for repairing and maintaining marine vessels.

 

 

RINA Steel Plate Grade
General Strength	RI/A	RI/B	RI/D	RI/E
High Strength	RI/A32	RI/D32	RI/E32	RI/F32
	RI/A36	RI/D36	RI/E36	RI/F36
	RI/A40	RI/D40	RI/E40	RI/F40
Extra Strength	RI/A420	RI/D420	RI/E420	RI/F420
	RI/A460	RI/D460	RI/E460	RI/F460
	RI/A500	RI/D500	RI/E500	RI/F500
	RI/A550	RI/D550	RI/E550	RI/F550
	RI/A620	RI/D620	RI/E620	RI/F620
	RI/A690	RI/D690	RI/E690	RI/F690

 

 

Grade	Rm (MPa)	Re(MPa) min	A% min	Akv/J min
Grade A	400-520	235	22	E.T °C	Thickness (mm)
				20	≤50		>50-70		>70-100
					L	C	L	C	L	C
					-	-	34	24	41	27

 

Grade	Rm (MPa)	Re(MPa) min	A% min	Akv/J min
Grade B	400-520	235	22	E.T °C	Thickness (mm)
				20	≤50		>50-70		>70-100
					L	C	L	C	L	C
					-	-	34	24	41	27

 

Grade	Thickness	Yield Strength	Tensile Strength	Elongation	Charpy V Notch Impact Test
					Degree	Value 1	Value 2
Grade D	mm	Min Mpa	Mpa	Min %	-20	J	J
	t≤50	235	400-520	22%		20	27
	50＜t≤70	235	400-520	22%		24	34
	70＜t≤100	235	400-520	22%		27	41
Note: Value 1 is transverse impact test, Value 2 is longitudinal

 

Grade	Rm (MPa)	Re(MPa) min	A% min	Akv/J min
Grade E	400-520	235	22	E.T °C	Thickness (mm)
				-40	≤ 50		>50-70		>70-100
					L	C	L	C	L	C
					27	20	34	24	41	27

Click to get a free sample

 

 

As a professional RINA Steel Plate For Hull Building supplier, GNEE STEEL's products have significant advantages over ordinary structural steel, fully adapting to the harsh marine environment and shipbuilding needs, and becoming the preferred material for global shipyards and offshore engineering projects, especially suitable for customers focusing on cost-effectiveness and practicality:

 

Strict RINA Certification & Global Recognition: All RINA hull building steel plates are fully certified by RINA and comply with IACS unified requirements, ensuring compliance with international shipbuilding standards and smooth entry into global markets. RINA, as a well-known international classification society, is authorized by 116 flag state governments to carry out surveys within their territory, with high recognition in European, Mediterranean, and Asian markets. We also provide EN 10204 3.1/3.2 mill test certificates and third-party testing (SGS, BV) to meet the requirements of international tenders and ship classification.

 

Excellent Cost-Effectiveness & Process Adaptability: As an Asian camp classification society, RINA's standards are more compatible with conventional steelmaking processes, with relatively flexible index limits, which can effectively reduce production costs while ensuring basic performance, making the products more cost-effective compared to DNV-GL and ABS grades. The chemical composition and mechanical property requirements are optimized for practicality, balancing performance and cost, which is very suitable for large-scale shipbuilding projects.

 

Good Low-Temperature Toughness & Impact Resistance: Different grades are designed for different temperature environments, with impact temperatures ranging from 20℃ (RINA A) to -40℃ (RINA EH36, E460), ensuring no brittle fracture in temperate, subtropical, and even part of cold marine areas. The impact energy ≥27J (normal strength) and ≥31J (extra high strength) guarantees structural safety under sudden impacts (e.g., waves, collisions). For ships navigating in cold seas, EH36 and E460 grades can fully meet the low-temperature toughness requirements.

 

Excellent Weldability & Formability: Low carbon equivalent and optimized alloy composition make RINA hull building steel easy to weld (arc welding, MIG welding, TIG welding) without preheating or with low preheating (≤150℃), facilitating on-site ship assembly and complex structural fabrication. It also has good formability, allowing for cutting, bending, and punching to meet the customized needs of hulls, decks, and bulkheads. For thick plates, RINA standards have clear requirements on Z-direction performance to prevent lamellar tearing during welding.

 

Stable Comprehensive Performance & High Reliability: Adopting advanced production processes (TMCP, Q&T) and strict quality control, the plates have uniform grain structure, excellent fatigue resistance, and load-bearing capacity, capable of withstanding long-term marine mechanical stresses (waves, wind, cargo load) without deformation or damage. RINA also has strict requirements on the manufacturing process, surface quality, and dimensional tolerance of steel plates, ensuring that each batch of products has stable performance. We also provide Z-direction performance (Z15/Z25/Z35) for thick plates to meet the needs of large ship hulls and offshore platforms.

 

Complete Specifications & Customization: GNEE STEEL provides a full range of RINA hull building steel grades (A/B/D/E, AH32-AH40, DH32-DH40, EH32-EH36, E420-E690), with thickness 3-300mm, width 1200-4200mm, length 3000-18000mm, covering normal strength, high strength, and extra high strength categories. We stock over 100,000 tons of different steel materials for immediate delivery, supporting small-order customization (minimum order quantity 1 ton), urgent orders, and customized heat treatment, impact temperature, and surface treatment to meet the needs of different ship types and offshore projects.

 

 

Due to their excellent comprehensive performance and cost-effectiveness, RINA Steel Plate For Hull Building are widely used in shipbuilding and offshore engineering fields, covering various types of ships and marine equipment. GNEE STEEL provides customized specifications to meet the needs of different projects, especially suitable for customers focusing on cost control and practical performance:

 

Ship Hull Construction: The core material for hulls, decks, bulkheads, keels, and ship bottoms of various ocean-going ships, including cargo ships, tankers, container ships, bulk carriers, passenger ships, and coastal ships. Normal strength grades (RINA A/B) are used for non-critical structural parts and upper buildings, while high-strength and extra-high strength grades (AH36, EH36, E460) are used for load-bearing parts (hull sides, decks) of large ships and offshore vessels.

 

Offshore Engineering Equipment: Offshore drilling platforms, offshore wind turbine towers and supports, offshore oil and gas storage tanks, and coastal defense structures. High-strength and extra-high strength RINA grades (EH36, E460) are preferred for their excellent low-temperature toughness and corrosion resistance, adapting to offshore environments such as coastal and shallow seas. RINA-certified steel plates are also widely used in post-fire repair and reinforcement of offshore structures due to their stable performance.

 

Ship Accessories & Repairs: Ship cargo holds, oil tanks, ship equipment supports, and ship repair parts. RINA hull building steel plates have good compatibility with existing ship structures, making them ideal for ship maintenance and modification projects, ensuring structural consistency and safety. They are also suitable for post-fire assessment and repair of ship hulls, helping to restore the structural performance of ships after fire incidents.

 

Marine Auxiliary Equipment: Marine cranes, shipboard containers, and marine pipelines. The plates' high strength and corrosion resistance ensure the reliability of auxiliary equipment in marine environments, reducing maintenance costs and downtime. For equipment used in low-temperature marine areas, EH36 and E460 grades can provide reliable performance support.

 

Special Marine Projects: Coastal patrol ships, offshore rescue ships, and inland waterway ships. High-strength and low-temperature grades (EH36, E460) are used to withstand complex marine conditions, ensuring the safety of special marine missions. RINA's focus on green and sustainable solutions also makes its steel plates suitable for environmentally friendly shipbuilding projects, helping to reduce carbon emissions.

 

RINA Steel Plate For Hull Building has corresponding equivalent grades in international ship classification society standards, which is convenient for customers in different regions to select and use.

 

Our Grade (RINA)	Type	ABS (USA)	CCS (China)	BV (France)	LR (UK)	NK (Japan)	KR (South Korea)
RINA A	Normal Strength	ABS A	CCS A	BV A	LR A	NK A	KR A
RINA B	Normal Strength	ABS B	CCS B	BV B	LR B	NK B	KR B
RINA AH36	High Strength	ABS AH36	CCS AH36	BV AH36	LR AH36	NK AH36	KR AH36
RINA EH36	High Strength	ABS EH36	CCS EH36	BV EH36	LR EH36	NK EH36	KR EH36
RINA E460	Extra High Strength	ABS FQ47	CCS E460	BV E460	LR EH46	NK KE47	KR E47

 

 

Comparison with Other Grades Within RINA Standard

RINA Grade	Type	Min Yield Strength (MPa)	Impact Temperature (°C)
RINA A	Normal Strength	235	20
RINA B	Normal Strength	235	0
RINA AH36	High Strength	355	-20
RINA EH36	High Strength	355	-40
RINA E460	Extra High Strength	460	-40

 

Comparison with Equivalent Grades (ABS A, CCS AH36, RINA A vs RINA B)

Grade Comparison	Standard	Yield Strength (MPa)	Key Differences
RINA A vs ABS A	RINA vs ABS	Both 235	ABS A is US standard (European and American camp), RINA A is Italian standard (Asian camp); both comply with IACS requirements, ABS has stricter surface quality and impurity control, RINA has more flexible process requirements
RINA AH36 vs CCS AH36	RINA vs CCS	Both 355	Both belong to Asian camp, CCS focuses on domestic market adaptability, RINA has higher international recognition in European and Mediterranean markets; both have similar chemical composition and mechanical properties
RINA A vs RINA B	RINA vs RINA	Both 235	RINA A has no mandatory impact energy requirement at 20℃, RINA B requires impact energy ≥27J at 0℃, better low-temperature toughness; RINA B has more stable manganese content (0.80-1.20%) compared to RINA A (≥2.5C)
RINA E460 vs ABS FQ47	RINA vs ABS	460 vs 470	ABS FQ47 (European and American camp) has slightly higher yield strength and stricter impurity control, RINA E460 has more flexible process requirements and lower production cost, similar low-temperature toughness

 

What is the meaning of the RINA grade designation ?

"RINA" stands for Registro Italiano Navale (Italian Classification Society); "A/B/D/E" indicates the quality grade (differentiated by impact temperature); "H" represents high-strength; the number (32/36/40) or specific designation (E420, E460) indicates the minimum yield strength (e.g., AH36 means high-strength grade with 355 MPa yield strength, impact temperature -20℃; E460 means extra-high strength grade with 460 MPa yield strength, impact temperature -40℃). RINA also has ultra-high strength grades such as E550, E690 for extreme-load offshore projects.

 

What are the maximum thickness and width of RINA Steel Plate For Hull Building provided by GNEE STEEL?

The standard thickness range is 3-300mm, width 1200-4200mm, length 3000-18000mm, which can cover most shipbuilding and offshore project needs. We stock a large number of standard specifications for immediate delivery, and support customized specifications, including special thickness (up to 350mm), width (up to 4800mm), and length. We also support small-order customization (minimum order quantity 1 ton) and urgent orders to meet your project schedule.

 

Do RINA Steel Plate For Hull Building require special welding processes?

They have excellent weldability; ordinary arc welding or MIG welding can be used. For thick plates (>30mm) or low-temperature environments, low preheating (100-150℃) is recommended to avoid welding cracks. We provide free professional welding guidance, including welding material selection, preheating temperature, and post-welding heat treatment parameters, referring to RINA 《Materials and Welding Code》 and relevant international standards. We also provide guidance on welding of thick plates with Z-direction performance to prevent lamellar tearing.

 

Can GNEE STEEL provide RINA certification and quality certificates for the plates?

Yes. All our RINA Steel Plate For Hull Building have RINA certification, and we can provide EN 10204 3.1/3.2 mill test certificates, including chemical composition, mechanical properties, impact test, and 100% ultrasonic flaw detection reports. We also provide third-party testing services (SGS, BV) if required, ensuring compliance with international project requirements. RINA certificates are recognized by 116 flag state governments, ensuring smooth customs clearance in global markets.

 

What is the lead time for RINA Steel Plate For Hull Building?

For stock specifications, delivery can be made within 3-7 days; for customized specifications, the lead time is 15-30 days. We cooperate with well-known logistics companies (Maersk, COSCO) to deliver to more than 50 countries and regions, with flexible transportation methods (sea, air, land) available. We are familiar with the import policies and customs clearance processes of various countries, especially European, Mediterranean, and Asian markets. For urgent orders, we can shorten the lead time to 10-15 days.

 

What is the difference between RINA normal strength and high-strength/extra-high strength hull building steel?

Normal strength grades (A/B/D/E) have yield strength 235-275 MPa, suitable for low-load, normal-temperature marine scenarios, with RINA A being the most cost-effective and RINA E having the best low-temperature toughness (-40℃); high-strength grades (AH32-EH36) have yield strength 315-355 MPa, better low-temperature toughness, suitable for large ships and harsh marine environments; extra-high strength grades (E420-E690) have yield strength ≥420 MPa, suitable for extreme-load projects such as deep-sea drilling platforms. Choose based on ship type, navigation area, and structural load: small ships in tropical seas can choose RINA A/B; large ships and offshore platforms choose AH36/EH36; deep-sea and extreme-load projects choose E460/E550.

 

 

As a leading RINA Steel Plate For Hull Building supplier with years of experience in marine steel export, GNEE STEEL has won the trust of global shipyards and offshore engineering companies with professional strength and high-quality service. Choosing us means choosing reliability, efficiency, and cost savings:

 

Strict RINA Certification & Quality Control: We have advanced production and testing equipment, strictly implementing RINA standards and IACS unified requirements. Each batch of plates undergoes chemical composition analysis, mechanical property testing, 100% ultrasonic flaw detection (EN 10160), and impact testing to ensure stable performance and qualified quality. We also pass ISO 9001 quality system certification, ensuring full quality traceability. Our production process is supervised by RINA surveyors to ensure that each batch of products meets the strict requirements of RINA standards.

 

Complete Product Specifications & Customization: We stock a full range of RINA hull building steel grades (normal strength, high strength, extra high strength), with complete thickness and width specifications, and stock over 100,000 tons of products for immediate delivery. Our technical team can provide customized solutions (heat treatment, impact temperature, Z-direction performance, surface treatment) according to your project needs, meeting the diverse needs of different ship types and offshore projects, including polar exploration ships and deep-sea drilling platforms.

 

Professional Technical Support: Our team of senior engineers with years of experience in marine steel provides one-stop technical services, including product selection, welding guidance, RINA certification consultation, post-fire assessment and repair guidance, and after-sales problem solving. We help you avoid technical risks and improve project efficiency and safety. We also provide professional advice on grade matching according to different regional classification society requirements, especially the differences between RINA and other classification societies.

 

Competitive Price & Fast Delivery: As a direct manufacturer, we eliminate intermediate links, providing customers with competitive factory prices. Combined with RINA's flexible standard requirements, we can further optimize production costs, bringing more cost savings to customers. We cooperate with well-known logistics companies to ensure fast and safe delivery to global destinations, with flexible transportation methods to meet your project schedule. For urgent orders, we can shorten the lead time to 10-15 days, ensuring that your project progresses smoothly.

 

Rich Export Experience: We have rich experience in exporting RINA Steel Plate For Hull Building to Asia, Europe, Africa, and the Americas, familiar with the import policies, certification requirements, and customs clearance processes of various countries. We are especially familiar with the European, Mediterranean, and Asian markets, providing targeted services for customers in these regions. We can provide professional customs clearance documents (RINA certification, mill test certificate) to ensure smooth delivery of your goods.

 

Perfect After-Sales Service: We provide 24-hour after-sales service. If there is any quality problem with the products, we will respond quickly and provide solutions (return, replacement, or compensation) to protect your legitimate rights and interests. Our long-term after-sales support ensures the smooth operation of your shipbuilding and offshore projects, including post-fire maintenance and technical guidance.

 

 

RINA Steel Plate For Hull Building is a high-performance, high-reliability marine structural steel that strictly complies with RINA standards and IACS unified requirements, with excellent corrosion resistance, low-temperature toughness, weldability, and load-bearing capacity. It is divided into normal strength, high strength, and extra high strength grades, covering the needs of various shipbuilding and offshore engineering projects, from small civilian ships to large tankers and deep-sea drilling platforms.

 

Compared with other marine steel grades, RINA hull building steel has obvious advantages in cost-effectiveness, process adaptability, and international recognition, and is widely recognized by global shipyards and classification societies.

 

As an Asian camp classification society, RINA's standards balance performance and cost, adapting to conventional steelmaking processes, which can effectively reduce production costs for customers while ensuring basic performance. RINA's focus on green and sustainable solutions also makes its steel plates more in line with the development trend of the global marine industry.

 

GNEE STEEL is committed to providing high-quality RINA Steel Plate For Hull Building and professional one-stop services, from product selection to after-sales support, to help you reduce costs, improve efficiency, and ensure the safety and reliability of your shipbuilding and offshore projects.

 

Whether you need standard specifications or customized solutions, we can meet your needs with our strength and experience. With RINA Steel Plate For Hull Building from GNEE STEEL, you can get reliable material support for your global marine projects and achieve win-win cooperation.

Request A Quote

 

Are you looking for high-quality, RINA-certified hull building steel plates for your shipbuilding or offshore project? Do you need professional technical guidance to choose the right grade and specifications?

Contact GNEE STEEL now to get a free quote and detailed product sample!

 

📩 Send us an inquiry with your requirements (grade, thickness, width, length, quantity, and project scenario), and our professional team will reply to you within 2 hours, providing customized solutions and the most competitive price.

✅ RINA-certified products

✅ professional technical support

✅ on-time delivery

 

- GNEE STEEL is your trusted partner for RINA Steel Plate For Hull Building!

 

 

 

 

 

 

 

 

We have excellent after-sales service. If you have any questions about RINA Steel Plate For Hull Building, you can contact us and we will reply to you within two hours.

 

Relying on many first-class equipment, such as CNC Shearing machine, Press Brake machine, Straightening machine, Roll Bending machine, Flat Bar Machine, Deburring machine etc, GNEE STEEL could provide various semi-productsand extensive forming services to customers.

 

GNEE STEEL  PROCESSING

1.CTL & SL SERVICE (141 SETS)

Currently, GNEE STEEL has imported manyadvanced CTL/SL equipment from Italy and Korea and could provide customized CTL/SL services from cold rolled stainless steel and carbon steel to hot rolled stainless steel and carbon steel as well as strips and ultra-wide sheet.

CTL FACILITIES
Max Length:16500mm

Max Width:2200mm

Max Thickness:25.4mm

Max Yield Strength:1500Mpa
SL FACILITIES

Max Width:2200mm

Max Thickness:18mm

Max slit Quantity:31

Max Yield Strength:1200Mpa

 

2.CUTTING SERVICE

GNEE STEEL imported lots of advanced cutting machines from Germany, Sweden, America and Japan, including plasmas cutting machine, water jet cutting machine, laser cutting machine, flame cutting machine and saw machine. In order to meet customers' diversified needs, GNEE STEEL also adopts nest working multi-cutting methods and intensive production to improve production capacity and save costs for the customers.

Laser Cutting Machine

Max Cutting Length:40,000mm

Max Width:4,600mm
Max Thickness:100mm

 

Flame Cutting Machine

Max Cutting Length:40,000mm

Max Width:8,000mm
Max Thickness:500mm

Plasmas Cutting Machine

Max Cutting Length:30,000mm

Max Width:5,000mm
Max Thickness:100mm

 

Water-jet Cutting

Max Cutting Length:12,000mm

Max Width:4,010mm
Max Thickness:250mm

3.FORMING SERVICE

Steel Plate Roll Bending
Maximum Rolling Thickness: up to 200mm
Maximum Width: 4200mm

   

Automatic Bending Machine-Press Brake
Max Bending Capability:3000Ton
Max Bending Length:15,000mm

Expert in Bending High-Strength & Wear-Resistant Steels

  

  

Punching Machine

Max Width:3,070mm
Max Thickness:8mm

Max Pressure:250t

BEVELING SERVICE

GNEE STEEL beveling platform has edge milling machine, edge planer, flame / plasma groove cutting machine, flame groove cutting robot, desktop chamfering machine, gantry planerand other advanced equipment to provide customers with parts prefabrication services,daily processing of V-type, Y-type, X-type and U-type grooves, and guarantee subsequent processes such as welding and assembly of products.

 

Milling：
Max Cutting Length:18,000mm

Max Width:4500mm
Max Thickness:120mm

 

  

Beveling:
Max Length:16,000mm

Max Thickness:80mm

MACHINING SERVICE

GNEE STEEL owns CNC Portal-type Boring and Milling machine,CNC Floor-type Boring and Milling machine, Vertical Precision 5-axis Milling Machine, Portal-type Planer, Vertical Lathe, Cylindical Grinding machine, Hydraulic Planer and CNC Lathe and could provide fine machining of large spare parts and structural parts for customers.

Gantry Type Boring & Milling Maching Center

Max Length:48000mm

Max Width:12500mm
Max Height:8000mm

Max Diameter:10500mm

Deep-hole Drilling Equipment
Max Driling Depth:1,100mm
Max Bore Diameter:φ80mm
Max Diametar:φ4,500mm

MMulti-hole Drilling Equipment

Max Length:13,000mm
Max Width:10,000mm
Max Bore Diameter:φ105mm
Max Drilling Depth:250mm

Floor Boring And Milling Machine
Max Length:24,000mm
Max Height:8,000mm
Turntable Dimensions:9x5m

Vertical Lathe

Max Height:6,000mm

Max Diametar:φ22,00mm

Automated Edge Milling Machine

The Automated Edge Milling Machine is a leading product in heavy-duty milling equipment. It is primarily used for weld groove preparation (beveling) on large-format plates made of stainless steel, carbon steel, and special steel grades. It can process plates with a maximum thickness of up to 90mm, a length of 16 meters, and a width of 4 meters.

 

It is equipped with dual milling units and a fully automatic milling cutter head changing system, enabling automated 4-edge beveling. Its standout feature is the profiling technology used when milling wavy plates and irregularly shaped products, which ensures absolute consistency of the groove after milling.

 

Utilizing specially designed milling cutter heads, it can execute highly difficult and complex groove profiles in a single pass.

 

Materials: Plain carbon steel, pressure vessel steel, wear-resistant steel, high-strength steel, stainless steel, nickel-based alloys, etc.
Width: 1200 - 4200 mm
Length: 5800 - 16000 mm
Thickness: 5 - 90 mm
Weight: Up to 35 tons

 

This edge milling machine is the world's premier automated bevel milling equipment. With its excellent structural design and advanced data algorithms, it achieves full automation from plate detection to the actual milling process, significantly improving processing efficiency while guaranteeing high precision.

 

• Processing Accuracy

Length accuracy: ±1mm when L < 10m; ±2mm when L > 10m;

Width accuracy: ±1mm;

Diagonal accuracy: ±2mm;

Root face accuracy (blunt edge): ±1mm for Y-grooves; +0.5mm for X-grooves.

• Processing Efficiency

The processing efficiency is more than 10 times that of conventional edge milling or edge planing equipment.

HEAT TREATMENT

Heat Treatment Furnace
Max Furnace Size:36x12x13.5m
Max Rated Temperature:1100℃
Max Loading Capacity:800t

Heat Treatment of Pressure Vessels
Heat Treatment of Mining Equipment
Heat Treatment of Tube Sheet
Heat Treatment of Pressure Vessel Head

 

 

GNEE STEEL is currently participating in the procurement phase of a 100,000m³ full containment ammonia storage tank project, supplying high-quality steel plates for critical tank components. Due to the corrosive nature of ammonia and the risk of Ammonia Stress Corrosion Cracking (SCC), the project requires strict metallurgical control of materials according to EN 10028-3 standards.

 

One of the most important technical requirements of this project is the strict limitation of the actual Yield Strength (Re) for all NL2 grade materials. To prevent SCC risks in ammonia storage environments, the actual yield strength must not exceed 390 MPa, regardless of the nominal values specified in the standard or plate thickness ranges. This requirement places higher demands on steelmaking process control, heat treatment stability, and material testing.

 

Raw high-strength steel plates ready for the 100,000 m³ full containment ammonia storage tank production

 

Project Materials and Technical Requirements

 

The project mainly uses P355NL2 and P275NL2 normalized pressure vessel steel plates, which are widely applied in low-temperature storage tanks due to their excellent toughness and weldability.

 

Key technical specifications include:

• Material grades: P355NL2 and P275NL2 (Normalized)
• Yield strength: Standard minimum / Maximum limited to 390 MPa
• Hardness: ≤ 225 HBW in base material
• Impact testing: Charpy-V notch test at -50°C, minimum 27J
• Certification: EN 10204 3.1 certificate, with optional 3.2 certification

 

These strict requirements ensure that the steel plates maintain stable mechanical properties and high resistance to ammonia-induced stress corrosion during long-term operation.

 

Precision rolling and forming of steel plates into curved sections for the 100,000 m³ ammonia storage tank.

 

Project Plate Quantities and Thickness Distribution

 

The total steel demand for this ammonia storage tank project is several thousand tons, mainly distributed across different tank sections:

 

P355NL2 – Inner & Outer Tank Shell Plates

• Lower shell courses: 50 mm thickness – approx. 2,000 tons
• Middle shell courses: 25 mm thickness – approx. 1,400 tons
• Upper shell courses: 10 mm thickness – approx. 500 tons

 

P275NL2 – Tank Bottom Plates

• Thickness: 10–15 mm – approx. 750 tons

 

P275NL2 – Suspended Roof Structure

• Thickness: 5–8 mm – approx. 180 tons

 

S275JR – Outer Roof (Ambient Structure)

• Thickness: 10 mm – approx. 450 tons

 

To improve tank fabrication efficiency and reduce circumferential welds, the project also requires wide steel plates to minimize welding joints, which helps reduce the potential risk of SCC in ammonia service conditions.

 

Formed steel segments wrapped and racked for protection, ready for 100,000 m³ ammonia storage tank assembly.

 

GNEE STEEL provides high-precision steel plate rolling and cylinder fabrication solutions for tank manufacturers worldwide. Send us your plate specifications or fabrication drawings for a fast quotation.

Request A Quote

 

TYPE	GRADE	SPECIFICATIONS
Carbon Steel / Low Alloy Coil	Q235A/B/C/D/Q355B(Q345B)/C/D/E/SS400/SAPH400-C/ASTMA283Grade C	0.7~2.0*1250/1500mm*C 2.3~19.5*1250/1500/1800/2000mm*C
Medium Heavy Plate	Q235B/Q355B(Q345B)/C/D/E	6.0-200x150mm-4000mmxL
Vessel Plate	Q245R/Q345R/HP295/SA516MGR485/SA516GR70/P355NL2/P275NL2/ S275JR//SPV490/ASTM A537 Class 1/Class 2	2.5-120x1500mm-3000mmxL
High Strength Steel	510L/610L/700L/750L/BS600MCK4/BS700MCK2/BS700MCK4/ BS960E/BWELDY700QL2/L4/BWELDY960QL4/HG60D/70D/785D/ Q460D/Q550D/690D/690E/TQ600MCD/TQ700MCD/S700MCD/ WYS600/700/STRENX700MCE/Q490E/Q490D	1.2-60x 1500mm-2500mmxL
Patterned Steel	HQ235A|B	1.2-60x 1500mm-2500mmxL
Wear-resistance Steel	NM360/400/450/500/NM300TP/400TP/450TP/ ABREX400/450/500/B-HARD450XKY/ CREUSABRO4800/8000/EH C400LE/450LE/500LE/ HADOX450/500	3.0-50x1250mm-3300mmxL
Cold Rolled Coil	DC01/RECC/REDT/SPCC/ST12	0.5-3.0x1250mm-1500mmxC
Galvanized Plate	DC51D+AZ/DC51D+Z/DX51D+Z/SGH340+Z275/Z275/Z120/S350GD+ZM275	0.45-3.0x1250mm-1500mmxC
Pickled Coil	DD11/SPHC	2.0-6.0x1500xC

Stainless Steel Material and Surface Specifications

TYPE	GRADE	THICKNESS	SURFACE
Austenitic	304/304H/304L/304J1	0.25-150mm	2B/BA/NO.4/8K/SB/HL/NO.1
Austenitic	321	0.4-80mm	2B/BA/NO.4/8K/SB/HL/NO.1
Austenitic	316/316L/317L/316Ti	0.3-80mm	2B/BA/NO.4/8K/SB/HL/NO.1
Austenitic	201(J1/J2/J5)	0.35-12mm	2B/NO.1/1D
Ferrite	430	0.4-3.0mm	2B/BA/NO.4/8K/SB/HL
Ultra Pure Ferrite	443	0.4-2.0mm	2B
Ultra Pure Ferrite	436L/439/444/441	0.5-3.0mm	2B/2D

Special Steel / Nickel Base Alloy

TYPE	GRADE	GRADE (ASTM)	GRADE (EN)	THICKNESS
Heat-resistant Steel	309S	S30908	1.4833	0.5-40mm
Heat-resistant Steel	310S	S31008	1.4845	0.5-40mm
Duplex Stainless Steel	2101	S32101	1.4162	1.5-50mm
Duplex Stainless Steel	2304	S32304	1.4362	3.0-50mm
Duplex Stainless Steel	2205	S32205/S31803	1.4462	0.5-60mm
Duplex Stainless Steel	2507	S32750	1.4410	1.0-60mm
Super Austenitic-Steel	904L	N08904	1.4539	0.6-50mm
Super Austenitic-Steel	254SMO	S31254	1.4547	0.5-50mm
Super Austenitic-Steel	1.4529	N08926	1.4529	0.5-50mm
Super Austenitic-Steel	AL-6XN	N08367	1.4478	0.5-50mm
Nickel Base Alloy	Alloy 31	N08031	1.4562	1.0-50mm
Nickel Base Alloy	800	N08800	1.4876	0.8-50mm
Nickel Base Alloy	800H	N08810	1.4958	0.8-50mm
Nickel Base Alloy	800HT	N08811	1.4959	0.8-50mm
Nickel Base Alloy	Alloy 28	N08028	1.4563	1.0-20mm
Nickel Base Alloy	Alloy 20	N08020	2.4660	1.0-20mm
Nickel Base Alloy	825	N08825	2.4858	0.8-40mm
Nickel Base Alloy	C276	N10276	2.4819	0.5-50mm
Nickel Base Alloy	C22	N06022	2.4602	1.0-50mm
Nickel Base Alloy	625	N06625	2.4856	0.8-20mm
Nickel Base Alloy	400	N04400	2.4360	1.0-20mm
Nickel Base Alloy	600	N06600	2.4816	1.0-50mm
Nickel Base Alloy	Pure Ni 201	N02201	2.4061	0.5-20mm
Titanium	TA1	Gr.1	Class 1	0.5-50mm
Titanium	TA2	Gr.2	Class 2	0.5-50mm

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