GNEE Steel offer P355NB hot rolled steel plate and coil - a premium gas cylinder steel grade manufactured to EN 10120:2017 standards. As a specialized supplier of pressure vessel and gas cylinder steels, we serve LPG cylinder manufacturers, pressure vessel fabricators, and industrial gas companies across the globe.
With the growing global demand for clean energy solutions and the expanding LPG market, the need for high-quality, reliable gas cylinder steel has never been greater. GNEE Steel's P355NB product line is engineered to meet the most stringent international standards, helping our customers produce safe, durable, and cost-effective gas cylinders.
About GNEE Steel
GNEE Steel is a leading Chinese steel supplier specializing in pressure vessel steel, boiler steel, and gas cylinder steels. With over a decade of export experience, we supply steel products to more than 80 countries worldwide, backed by comprehensive quality control and dedicated customer support.
About P355NB Hot Rolled Steel
| Item | Specification |
|---|---|
| Product Name | P355NB Hot Rolled Steel Plate / Coil / Strip |
| Steel Grade | P355NB |
| Material Number | 1.0557 (Werkstoffnummer) |
| Standard | EN 10120:2017 - Steel sheet and strip for welded gas cylinders |
| Delivery Condition | Normalized (N) |
| Product Forms | Plate, Coil, Strip |
| Primary Application | Welded LPG gas cylinders, industrial gas cylinders, pressure vessels |
Core Selling Points of P355NB Hot Rolled Steel Plate
High Strength
Min. 355 MPa yield strength enables lighter cylinder design
Excellent Formability
Deep drawable with ≥19-24% elongation for defect-free forming
Superior Weldability
Low carbon equivalent ensures clean, strong welds every time
Non-Ageing
Stable properties throughout the cylinder's 15-30 year service life
Chemical Composition (Heat Analysis, max %)
| C | Mn | Si | P | S | Al |
|---|---|---|---|---|---|
| ≤ 0.20 | ≥ 0.70 / ≤ 1.60 | ≤ 0.50 | ≤ 0.025 | ≤ 0.015 | ≥ 0.020 |
Mechanical Properties (Normalized Condition)
| Property | Thickness 1.7–3 mm | Thickness 3–5 mm | Test Direction |
|---|---|---|---|
| Yield Strength (ReH) | ≥ 355 MPa | ≥ 355 MPa | Transverse |
| Tensile Strength (Rm) | 510 – 620 MPa | 510 – 620 MPa | Transverse |
| Elongation (A80) | ≥ 19% | ≥ 24% | Transverse |
Why Choose GNEE Steel's P355NB?
Your Trusted Partner for Gas Cylinder Steel
When it comes to pressure vessel and gas cylinder steels, quality and reliability are non-negotiable. Here's why customers worldwide choose GNEE Steel as their P355NB supplier:
Strict Quality Compliance
Every batch of our P355NB steel is produced in full compliance with EN 10120:2017 standards. We work only with reputable mills that have established quality management systems and hold key industry certifications.
Stable Supply & Large Inventory
GNEE Steel maintains strategic stock of P355NB steel plate and coil in multiple warehouses across China. This allows us to fulfill both standard and urgent orders with short lead times.
- Regular stock of P355NB plate in common thicknesses (2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 5.0mm)
- Mill-direct production capacity for custom specifications
- Multiple warehouse locations for optimized logistics
- Emergency stock program for key accounts
Full-Process Quality Control
Our quality assurance team inspects material at every stage - from raw material receipt to final shipment - ensuring that only defect-free products reach our customers.
- Incoming raw material inspection
- Mill test report verification
- Dimensional and visual inspection
- Surface quality checking
- Optional third-party inspection (SGS, BV, TÜV, etc.)
- Pre-shipment inspection with photo/video documentation
Customization & Flexibility
We understand that every customer has unique requirements. GNEE Steel offers flexible customization options:
- Custom thickness, width, and length
- Surface treatment: mill finish, pickled, oiled
- Edge treatment: mill edge, trimmed edge
- Cut-to-length or slitting services
- Special packaging requirements
- Additional testing upon request
Competitive Pricing & Fast Delivery
Through our long-term partnerships with top-tier Chinese steel mills and efficient supply chain management, we offer competitive prices without compromising on quality.
- Direct mill pricing - no middlemen
- Volume-based discounts for large orders
- Standard delivery: 7-15 days for stock items, 25-40 days for production
- Express delivery options for urgent requirements
- Multiple shipping ports for flexibility
Applications of P355NB gas cylinder steel
GNEE Steel's P355NB steel serves a wide range of gas cylinder and pressure vessel applications across multiple industries:
| Industry | Application | Why P355NB? |
|---|---|---|
| 🏠 Domestic LPG | LPG gas cylinders for cooking and heating | High safety, excellent formability, long service life |
| 🏭 Industrial Gases | Industrial oxygen, nitrogen, argon cylinders | High strength, reliable weldability, pressure resistance |
| 🧯 Fire Safety | Fire extinguisher cylinders | Consistent quality, strict safety standards compliance |
| ⛽ Energy | CNG cylinders, propane storage tanks | High strength-to-weight ratio, corrosion resistance |
| 🏗️ Pressure Equipment | Small pressure vessels, air receivers | Versatile, weldable, meets PED requirements |
How to Order
- Send Inquiry - Provide your requirements: grade, specification (thickness × width × length), quantity, destination port, and any special requirements.
- Get Quotation - Our sales team will respond with a detailed quotation within 24 hours, including price, delivery time, and payment terms.
- Confirm Order - After confirming specifications and pricing, sign the sales contract and arrange the deposit.
- Production / Stock Allocation - We allocate stock material or arrange production according to your requirements.
- Inspection - Pre-shipment inspection (factory or third-party) to ensure quality meets your requirements.
- Shipment & Documentation - We arrange shipping and provide full documents (B/L, MTC, packing list, invoice, CO, etc.).
- Delivery & After-Sales - Receive your material at the destination port. Our team stays available for any post-delivery support.
Ready to Source P355NB Steel for Your Gas Cylinder Production?
Send us your requirements and get a competitive quote within 24 hours. Our team is ready to support you with technical advice, samples, and efficient order processing.
FAQ
What is the difference between P355NB and P355N steel?
While both grades share a 355 MPa yield strength, they serve different purposes and follow different standards:
P355NB follows EN 10120 and is specifically designed for welded gas cylinders. It features deep drawability and non-ageing properties required for cylinder manufacturing.
P355N follows EN 10028-3 and is a fine-grain structural steel for general pressure vessels (thicker plates, higher temperature applications).
They are not interchangeable. Always specify the full grade designation when ordering.
What is the minimum order quantity (MOQ) for P355NB?
For stock material, the MOQ is 1 ton (can be combined with other sizes). For custom production orders, the MOQ is typically 25 tons per specification. Contact our sales team to discuss your specific needs - we can often accommodate small quantities from our stock inventory.
