Pressure Vessel & Boiler Steel Plate
ASME ASTM EN GB Certified Supplier, Custom Processing & Full Third-Party Inspection
We supply full-series pressure vessel and boiler steel plates complying with global mainstream industrial standards, covering carbon steel, high-temperature heat-resistant alloy steel, cryogenic low-temperature steel, HIC anti-sulfur corrosion steel and 9Ni ultra-low temperature steel. Our steel materials are widely applied in LNG storage tanks, industrial steam boilers, shell-and-tube heat exchangers, welded gas cylinders, petrochemical reactors and various pressure storage equipment for power, cryogenic energy, chemical and gas industries.
We deliver one-stop integrated solutions including raw steel plate supply, customized secondary machining, full range inspection test and complete official certification documents. Our vessel steel has been exported to dozens of countries across Europe, Southeast Asia, Middle East, South Asia, Africa and Latin America. Our professional technical team provides free grade matching suggestions based on your actual working temperature, design pressure and corrosive medium conditions.
If you want to learn about the specific grades of Pressure Vessel & Boiler Steel Plates, you can click on the Pressure Vessel Steel Plates Product Page.
Complete Standards We Support
✅ ASME / ASTM Standards: SA516/A516M, SA387/A387M, SA537, SA553 Type I (9Ni steel), A285 Gr.C
✅ European EN Standards: EN 10028-2/3/4, EN 10120 (welded gas cylinder dedicated steel)
✅ Chinese GB National Standards: GB/T 713, GB 3531, GB/T 19189 (06Ni9DR 9Ni cryogenic steel)
✅ JIS & DIN Standards: JIS G3115, DIN 17155
If your project requires PED or ASME stamp matched materials, contact us to confirm fully qualified steel grades.
What are the key features of boiler & pressure vessel steel?
Sufficient Strength and Toughness
This is the foundation for ensuring that equipment does not deform or rupture under pressure.
- Strength: The steel must have high yield strength and tensile strength. For example, the commonly used boiler and vessel plate Q345R has a yield strength of approximately 340 MPa; while some low-alloy structural steels can achieve yield strengths in the range of 300–450 MPa.
- Toughness: To prevent brittle fracture, the steel must exhibit good impact toughness. For instance, pressure vessel steels are required to meet specific impact toughness values at various temperatures, such as 20°C and -40°C.
Excellent Workability
To facilitate manufacturing and ensure the safety of welded structures, the processability of the steel is crucial.
- Weldability: This is a critical indicator. The steel must have a low carbon equivalent and good weldability to avoid cracks in the heat-affected zone during welding. For example, steels like SA516Gr60 are widely used due to their minimal welding deformation.
- Formability: The material must possess good cold and hot forming capabilities, such as cold bending properties, and be able to withstand significant cold deformation during the manufacturing process.
Specialized Properties for Specific Environments
Depending on the equipment's operating temperature, additional properties are required.
- High-Temperature Performance (for equipment operating above 500°C):
- Creep Strength and Rupture Strength: Under long-term high-temperature loading, materials undergo slow plastic deformation (creep). Therefore, sufficient creep strength and rupture strength are essential.
- Microstructural Stability at High Temperatures: The internal structure of the material must not undergo harmful changes during prolonged high-temperature exposure.
- High-Temperature Oxidation Resistance: The material surface should resist oxidation corrosion at elevated temperatures.
- Low-Temperature Performance (for medium- and low-temperature equipment): For equipment operating in low-temperature environments or storing cryogenic media, the steel must possess good low-temperature impact toughness to prevent cold embrittlement.
- Corrosion and Hydrogen Resistance: In specific media (such as environments containing sulfur or hydrogen), the steel must be resistant to corrosion. For example, SA516 series steel plates are widely favored for their strong resistance to sour environments (H₂S) and compliance with NACE standards.
Strict Chemical Composition and Purity
This forms the foundation for guaranteeing all of the above properties.
- Strict Control of Harmful Elements: Extremely strict limits are imposed on the content of harmful elements such as Phosphorus (P) and Sulfur (S).
- High Purity and Uniform Microstructure: Through processes like effective deoxidation and secondary refining, non-metallic inclusions are removed, ensuring high purity and uniform microstructure.
- Grain Size Control: The grain size must be controlled within a specific range (typically 3–7) to ensure both strength and toughness are balanced.
If you want to learn about the specific grades of Pressure Vessel Steel Plates, you can click on the Pressure Vessel Steel Plates Product Page.
Regular In-Stock Steel Grades
1. Carbon Vessel & Boiler Steel (Medium & Normal Temperature Working)
ASTM: A516 Gr60, A516 Gr70, A285 Gr.C
EN: P265GH, P355GH
GB: Q245R, Q345R Main
2. High-Temperature Heat Resistant Alloy Steel
ASTM: SA387 Gr11 CL2, SA387 Gr22 CL2
EN: 16Mo3, 13CrMo4-5
GB: 15CrMoR, 12Cr1MoVR
3. Cryogenic Low-Temperature Steel For LNG
ASTM: SA553 Type I (9Ni Steel)
EN: P355NL1, P355NL2
GB: 16MnDR, 09MnNiDR, 06Ni9DR (9Ni steel)
4. HIC Anti-Corrosion Steel For Sour Oil & Gas Service
Grade: A516 Gr70 HIC customized anti-hydrogen induced cracking steel
If you want to learn about the specific grades of pressure vessel steel, you can click on the Pressure Vessel Steel Plates Product Page.
What are the applications of boiler & pressure vessel steel?
1. LNG & Cryogenic Energy Industry
Application Scenarios: Large on-site LNG flat storage tanks, ethylene cryogenic storage vessels, liquid gas pressure containers
- Grades We Regularly Supply: ASTM A553 Type I, GB 06Ni9DR (9Ni Steel), 16MnDR, P355NL2 Advantage: Stable stock of 9Ni steel that passes strict -196℃ low temperature impact test for extreme cryogenic working conditions.
2. Thermal Power & Industrial Boiler Industry
Application Scenarios: Steam boiler drum, boiler header, furnace pressure-bearing structural components
- Grades We Regularly Supply: Q345R, P265GH, P355GH, SA387 Gr11/Gr22, 16Mo3, 15CrMoR Advantage: Full PED certification available for European power station projects.
3. Shell & Tube Heat Exchanger Equipment
Application Scenarios: Heat exchanger shell pressure plates, chemical heat exchange pressure chambers
- Grades We Regularly Supply: A516 Gr70, Q345R, P355GH, SA537 Class 1
4. Welded Gas Cylinder & LPG Storage Equipment
Application Scenarios: Small industrial welded gas cylinders, bulk LPG transport & storage tanks
- Grades We Regularly Supply: P265NB, P355NB, HP295, A516 Gr60
5. Petrochemical Reactor & Sour Medium Storage
Application Scenarios: High-pressure chemical reactors, crude oil storage tanks, anti-corrosion pressure vessels under sulfur medium
- Grades We Regularly Supply: A516 Gr70 HIC, Q345R, SA537 Class 2
Process of Pressure Vessel Steel
Raw Material Selection
The first step in the process of pressure vessel steel production is the selection of raw materials.
The raw materials used for manufacturing pressure vessel steel are typically low carbon steel alloys.
The composition and properties of the raw materials are carefully evaluated to ensure they meet the required specifications.
Melting and Casting
Once the raw materials are selected, they are melted in a high-temperature furnace.
The molten steel is then cast into a desired shape, such as a slab or a billet.
Special techniques like continuous casting may be used to achieve a more controlled cooling process and improve the quality of the steel
Rolling and Forming
The cast steel is then subject to a series of rolling and forming operations.
Hot rolling involves passing the steel through a set of large rollers to reduce its thickness and shape it into plates or sheets.
Cold rolling, on the other hand, is done at room temperature to further refine the steel's properties and achieve the desired thickness.
Heat Treatment
Heat treatment is a critical step in the process of pressure vessel steel production.
It involves subjecting the steel to controlled heating and cooling cycles to modify its microstructure and improve its mechanical properties.
Common heat treatment processes for pressure vessel steel include annealing, normalizing, and quenching and tempering.
Machining and Finishing
Once the steel has undergone heat treatment, it may be machined to achieve the final desired dimensions.
Machining processes like milling, drilling, and grinding are used to remove excess material and refine the surface finish of the steel.
The steel may also undergo additional finishing processes, such as shot blasting or coating, to further enhance its appearance and protect it from corrosion.
Quality Control and Testing
Throughout the entire process of pressure vessel steel production, quality control measures are implemented to ensure the steel meets the required standards.
Various tests, including chemical analysis, mechanical testing, and non-destructive testing, are performed to verify the steel's properties and detect any defects.
Only after successfully passing these quality control tests, the pressure vessel steel is deemed suitable for its intended application.
Final Product Inspection and Packaging
Before packaging and shipment, the final pressure vessel steel products undergo a thorough inspection.
This inspection ensures that the product meets all the specified requirements and is free from any defects or imperfections.
Once inspected, the steel is carefully packaged and labeled for transport to its intended destination.
why Choose GNEE Steel?
- Complete full-grade product portfolio: Cover normal temperature, high temperature, ultra-low temperature, anti-corrosion working conditions, with stable spot supply of hard-to-source 9Ni cryogenic steel
- Integrated one-stop service: Raw steel plate stock, custom cutting, heat treatment, full range inspection & certification support
- Strict quality control system: 100% UT ultrasonic testing for all vessel steel, all material batches with full traceable test certificates
- Rich global export experience: Fully familiar with ASME, PED, GB international standards, support global port delivery
- Flexible order threshold: Accept small sample trial orders and large bulk project orders with tiered preferential pricing
Full Custom Processing Services
We offer full one-stop secondary processing service to help vessel manufacturers skip external outsourcing and directly process finished parts:
- Precision Cutting: Flame cutting, plasma cutting, full CNC cutting strictly according to customer CAD drawings
- Heat Treatment: Normalizing, annealing, quenching & tempering to meet material standard mechanical property requirements
- Welding Edge Machining: V-type, X-type, K-type welding bevel processing for easy on-site welding
- Surface Treatment: Shot blasting rust removal, anti-rust paint coating for long-distance sea transportation
- Flexible Size Customization: Customized width & length, support small sample batch cutting
Send your CAD drawing to obtain combined quotation of steel plate raw material plus processing fees.
Complete Inspection & Test Supporting Services
All our pressure vessel steel plates carry out strict safety testing complying with international pressure equipment codes, all test records traceable:
- Standard Factory Routine Test: Chemical composition analysis, tensile strength test, Charpy impact test, hardness test
- Mandatory Full Inspection: 100% Ultrasonic Testing (UT) to detect internal lamination, cracks and defects (mandatory standard for all pressure vessel plates)
- Third-Party Witness Inspection: SGS, BV, TUV, DNV on-site witness testing as customer required
- Complete Certification Documents: Original MTC material test certificate, EN10204 3.1 / 3.2 inspection certificate, HIC anti-corrosion test report, low-temperature impact test report
- Custom Specialized Test: Simulated post-weld heat treatment PWHT test, customized temperature impact test per project specification
When purchasing hydrogen-resistant vessel steel plates such as SA516Gr60N and P355GH, buyers are most concerned about receiving goods without official test documentation. Cracking during pressure testing or failing third-party inspections will lead to massive cost overruns and project schedule delays.
Backed by our long-term direct supply partnerships with mainstream steel mills, GNEE Steel supplies a full set of compliant inspection documents for every batch of delivered steel products, including: HIC (Hydrogen Induced Cracking) test reports, SSCC (Sulfide Stress Corrosion Cracking) test reports, high & low temperature impact test reports, tensile and yield strength test reports, ultrasonic (UT) laminar flaw detection reports, chemical composition spectroscopic analysis reports, heat treatment certificates, as well as dimensional & visual inspection records.
All reports are provided in high-definition watermark-free files, with test data strictly matched to corresponding heat numbers and material batch numbers, helping you pass client and supervisor audits smoothly.
Get Custom Pressure Vessel Steel Solution & Ex-Factory Wholesale Price
Fill in below information to receive precise quotation and professional material matching scheme:
- Required steel grade or detailed working conditions (operating temperature, design pressure, corrosive medium)
- Steel plate thickness, width, length and total order tonnage
- Secondary processing requirements (cutting, bevel, heat treatment, blasting coating)
- Required inspection standards & certification types
- Destination country and discharge port
Our dedicated vessel steel engineer will reply within 1 working hour, including material selection advice, itemized price list and accurate production & delivery schedule.
Frequently Asked Questions Pressure Vessel Steel
What steel is used for pressure vessels?
While there are multiple grades of PVQ steel, ASTM A516 and ASTM A537 are most commonly used for pressure vessel applications due to their balance of strength and ductility.
What is SA 387 equivalent material?
The Equivalent materials of Sa 387 Gr 12 are BS 620B, UNS K11757, A387 / SA 387, DIN 13 CRMO 44, and EN 3 CRMO 45.
What is the difference between SA 387 Grade 11 CL 1 and Class 2?
The difference between SA 387 Grade 11 Class 1 and Class 2 Plate lies in their mechanical properties. However, they both have the same chemical composition. The tensile strength and yield strength of class 2 material is higher than that of class 1, whereas the elongation for class 1 is higher compared to class 2.
What is the difference between SA 516 GR 70 and SA 387 GR 11?
Compared to carbon steel plates, SA 387 Gr 11 plates offer superior corrosion and oxidation resistance while maintaining good tensile and yield strength. Compared to SA 516 Gr 70 plates, SA 387 Gr 11 plates have better resistance to oxidation and corrosion, making them a better choice for high-temperature environments.
What is the difference between A36 and SA516?
ASTM A516 GR 70 outperforms ASTM A36 in tensile strength, low-temperature toughness, and pressure vessel applications, while A36 is better suited for general structural uses. Gangsteel's ASME SA516 GR 70 plates are engineered for reliability, meeting stringent standards for demanding industries.
What is the difference between SA516 grade 60 and 70?
ASME SA 516 Grade 60 and Grade 70 are both carbon steel plates used for boilers and pressure vessels. Grade 70 is designed for high-pressure applications requiring superior tensile strength, while Grade 60 contains less carbon, providing higher ductility, better low-temperature impact toughness, and easier welding.
What is the difference between SA 516 GR 70 and SA 537 CL 1?
SA516 Gr 70 is a normalized carbon steel for moderate temps with yield 38 ksi, while SA537 Cl 1 is a normalized carbon-manganese-silicon steel with higher yield 50 ksi for low-temp toughness.
What is the difference between SA 537 Class 1 and Class 2?
Overview SA 537 Cl 1 & SA 537 Cl 2
Class 1 is normalized and the tensile is in the 70,000 – 90,000 level. Class 2 is quenched and tempered with a tensile range of 80,000 – 100,000. Minimum yield strength for class 1 is 50,000 and for class 2 is 60,000.
What is the ASTM material equivalent to Q245R?
ASTM A516 Grade 60
The equivalent ASTM material for Q245R, a Chinese low-alloy steel grade used for pressure vessels, is ASTM A516 Grade 60.
What is the difference between Q245R and Q345R?
Difference Between Q345R and Q245R Steel Plate
For example: Obviously Q345R has the advantage on pressure vessel yield strength; while Q245R shows advantage on Calculation of container stiffness, and for Q245R is carbon steel, it has price advantage compared to low alloy steel-Q345R.
| Grades Of Pressure Vessel Plates Supplied By GNEE | |||||
| ASTM | ASTM A202/A202M | ASTM A202 Grade A | ASTM A202 Grade B | ||
| ASTM A203/A203M | ASTM A203 Grade A | ASTM A203 Grade B | ASTM A203 Grade D | ASTM A203 Grade E | |
| ASTM A203 Grade F | |||||
| ASTM A204/A204M | ASTM A204 Grade A | ASTM A204 Grade B | ASTM A204 Grade C | ||
| ASTM A285/A285M | ASTM A285 Grade A | ASTM A285 Grade B | ASTM A285 Grade C | ||
| ASTM A299/A299M | ASTM A299 Grade A | ASTM A299 Grade B | |||
| ASTM A302/A302M | ASTM A302 Grade A | ASTM A302 Grade B | ASTM A302 Grade C | ASTM A302 Grade D | |
| ASTM A387/A387M | ASTM A387 Grade 5 Class1 | ASTM A387 Grade 5 Class2 | ASTM A387 Grade 11 Class1 | ASTM A387 Grade 11 Class2 | |
| ASTM A387 Grade 12 Class1 | ASTM A387 Grade 12 Class2 | ASTM A387 Grade 22 Class1 | ASTM A387 Grade 22 Class2 | ||
| ASTM A515/A515M | ASTM A515 Grade 60 | ASTM A515 Grade 65 | ASTM A515 Grade 70 | ||
| ASTM A516/A516M | ASTM A516 Grade 55 | ASTM A516 Grade 60 | ASTM A516 Grade 65 | ASTM A516 Grade 70 | |
| ASTM A517/A517M | ASTM A517 Grade A | ASTM A517 Grade B | ASTM A517 Grade E | ASTM A517 Grade F | |
| ASTM A517 Grade P | ASTM A517 Grade J | ||||
| ASTM A533/A533M | ASTM A533 Grade A Class1 | ASTM A533 Grade B Class1 | ASTM A533 Grade C Class1 | ASTM A533 Grade D Class1 | |
| ASTM A533 Grade A Class2 | ASTM A533 Grade B Class2 | ASTM A533 Grade C Class2 | ASTM A533 Grade D Class2 | ||
| ASTM A533 Grade A Class3 | ASTM A533 Grade B Class3 | ASTM A533 Grade C Class3 | ASTM A533 Grade D Class3 | ||
| ASTM A537/A537M | ASTM A537 Class1 | ASTM A537 Class2 | ASTM A537 Class3 | ||
| ASTM A612/A612M | ASTM A612 | ||||
| ASTM A662/A662M | ASTM A662 Grade A | ASTM A662 Grade B | ASTM A662 Grade C | ||
| EN | EN10028-2 | EN10028-2 P235GH | EN10028-2 P265GH | EN10028-2 P295GH | EN10028-2 P355GH |
| EN10028-2 16MO3 | |||||
| EN10028-3 | EN10028-3 P275N | EN10028-3 P275NH | EN10028-3 P275NL1 | EN10028-3 P275NL2 | |
| EN10028-3 P355N | EN10028-3 P355NH | EN10028-3 P355NL1 | EN10028-3 P355NL2 | ||
| EN10028-3 P460N | EN10028-3 P460NH | EN10028-3 P460NL1 | EN10028-3 P460NL2 | ||
| EN10028-5 | EN10028-5 P355M | EN10028-5 P355ML1 | EN10028-5 P355ML2 | EN10028-5 P420M | |
| EN10028-5 P420ML1 | EN10028-5 P420ML2 | EN10028-5 P460M | EN10028-5 P460ML1 | ||
| EN10028-5 P460ML2 | |||||
| EN10028-6 | EN10028-6 P355Q | EN10028-6 P460Q | EN10028-6 P500Q | EN10028-6 P690Q | |
| EN10028-6 P355QH | EN10028-6 P460QH | EN10028-6 P500QH | EN10028-6 P690QH | ||
| EN10028-6 P355QL1 | EN10028-6 P460QL1 | EN10028-6 P500QL1 | EN10028-6 P690QL1 | ||
| EN10028-6 P355QL2 | EN10028-6 P460QL2 | EN10028-6 P500QL2 | EN10028-6 P690QL2 | ||
| JIS | JIS G3115 | JIS G3115 SPV235 | JIS G3115 SPV315 | JIS G3115 SPV355 | JIS G3115 SPV410 |
| JIS G3115 SPV450 | JIS G3115 SPV490 | ||||
| JIS G3103 | JIS G3103 SB410 | JIS G3103 SB450 | JIS G3103 SB480 | JIS G3103 SB450M | |
| JIS G3103 SB480M | |||||
| GB | GB713 | GB713 Q245R | GB713 Q345R | GB713 Q370R | GB713 12Cr1MoVR |
| GB713 12Cr2Mo1R | GB713 13MnNiMoR | GB713 14Cr1MoR | GB713 15CrMoR | ||
| GB713 18MnMoNbR | |||||
| GB3531 | GB3531 09MnNiDR | GB3531 15MnNiDR | GB3531 16MnDR | ||
| DIN | DIN 17155 | DIN 17155 HI | DIN 17155 HII | DIN 17155 10CrMo910 | DIN 17155 13CrMo44 |
| DIN 17155 15Mo3 | DIN 17155 17Mn4 | DIN 17155 19Mn6 | |||
Stock Availability:
| Thickness (mm) | Length x Width (mm) | Length x Width (mm) | Length x Width (mm) | Length x Width (mm) |
|---|---|---|---|---|
| 6 | 12000 x 2000 | 10000 x 2500 | 12000 x 3000 | 14000 x 3500 |
| 8 | 12000 x 2000 | 10000 x 2500 | 12000 x 3000 | 14000 x 3500 |
| 10 | 12000 x 2000 | 10000 x 2500 | 12000 x 3000 | 14000 x 3500 |
| 13 | 12000 x 2000 | 10000 x 2500 | 12000 x 3000 | 14000 x 3500 |
| 16 | 12000 x 2000 | 10000 x 2500 | 12000 x 3000 | 14000 x 3500 |
| 20 | 12000 x 2000 | 10000 x 2500 | 12000 x 3000 | 14000 x 3500 |
| 25 | 12000 x 2000 | 10000 x 2500 | 12000 x 3000 | 14000 x 3500 |
| 30 | 12000 x 2000 | 10000 x 2500 | 12000 x 3000 | 14000 x 3500 |
| 35 | 12000 x 2000 | 10000 x 2500 | 12000 x 3000 | 14000 x 3500 |
| 40 | 12000 x 2000 | 10000 x 2500 | 12000 x 3000 | 14000 x 3500 |
| 45 | 12000 x 2000 | 10000 x 2500 | 12000 x 3000 | 14000 x 3500 |
| 50 | 12000 x 2000 | 10000 x 2500 | 12000 x 3000 | 14000 x 3500 |
| 55 | 12000 x 2000 | 10000 x 2500 | 7500 x 3000 | 14000 x 3500 |
| 60 | 12000 x 2000 | 10000 x 2500 | 7500 x 3000 | |
| 65 | 12000 x 2000 | 10000 x 2500 | 7500 x 3000 | |
| 70 | 12000 x 2000 | 10000 x 2500 | 7500 x 3000 | |
| 75 | 12000 x 2000 | 10000 x 2500 | 7500 x 3000 | |
| 80 | 12000 x 2000 | 10000 x 2500 | 7500 x 3000 | |
| 85 | 8000 x 2000 | 7500 x 2500 | 7500 x 3000 | |
| 90 | 8000 x 2000 | 7500 x 2500 | 7500 x 3000 | |
| 95 | 8000 x 2000 | 7500 x 2500 | 7500 x 3000 | |
| 100 | 8000 x 2000 | 7500 x 2500 | 6000 x 3000 | |
| 110 | 7500 x 2000 | 7500 x 2500 | 6000 x 3000 | |
| 120 | 7500 x 2000 | 7500 x 2500 | 6000 x 3000 | |
| 130 | 7500 x 2000 | 7500 x 2500 | 6000 x 3000 | |
| 140 | 7500 x 2000 | 7500 x 2500 | 6000 x 3000 | |
| 150 | 7500 x 2000 | 7500 x 2500 | 6000 x 3000 | |
| 160 | 6000 x 2000 | 6000 x 2500 | 5000 x 3000 | |
| 170 | 6000 x 2000 | 6000 x 2500 | 5000 x 3000 | |
| 180 | 6000 x 2000 | 6000 x 2500 | 5000 x 3000 | |
| 190 | 6000 x 2000 | 6000 x 2500 | 5000 x 3000 | |
| 200 | 6000 x 2000 | 6000 x 2500 | 5000 x 3000 |
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