P355NB Hot Rolled Steel Plate For Pressure Vessels
Want to know more about our products? Please contact us by email or phone.
Gnee Steel (Tianjin) Co., Ltd. is one of the most professional p355nb hot rolled steel plate for pressure vessels manufacturers and suppliers in China. Welcome to wholesale customized p355nb hot rolled steel plate for pressure vessels at competitive price from our factory. Good service and quality products are available.
P355NB is a high-strength, hot-rolled non-alloy steel grade manufactured in compliance with EN 10120 standard. As the highest-strength grade in the PNB series (alongside P245NB, P265NB, and P310NB), P355NB offers a minimum yield strength of 355 MPa and a tensile range of 510–620 MPa.
Compared with lower-grade steels (such as P265NB), P355NB offers higher yield strength, making it ideal for applications requiring greater pressure resistance and structural reliability.
At GNEE Steel, we pride ourselves on being more than just a manufacturer; we are a partner in your success. Our high-grade P355NB Pressure Vessels steel is trusted by leading cylinder manufacturers worldwide for its consistency and reliability.
Technical Specifications for P355NB Hot Rolled Steel Plate
Material Number: 1.0557
Equivalent Designations:
| Standard | Grade |
|---|---|
| Germany (DIN) | 19Mn6 |
| Japan (JIS) | SG365 |
| France (AFNOR) | BS4 |
| UK (BS) | Type E |
| Italy (UNI) | Fe E 35 KR |
Chemical Composition (Typical)
| Element | Content (%) |
|---|---|
| C | ≤ 0.20 |
| Mn | ≤ 1.60 |
| P | ≤ 0.025 |
| S | ≤ 0.015 |
| Al | ≥ 0.020 |
Optimized composition ensures strength + weldability balance
Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (ReH) | ≥ 355 MPa |
| Tensile Strength | 490 – 630 MPa |
| Elongation (A80) | ≥ 22% |
| Impact Test | Optional / upon request |
Dimensional Range
| Product Form | Thickness | Width | Length / Coil Weight |
|---|---|---|---|
| Hot Rolled Steel Coil | 2.0mm – 6.0mm | 800mm – 1700mm | 15-25 MT per coil |
| Hot Rolled Steel Plate | 3.0mm – 12.0mm | 1000mm – 2500mm | 2000mm – 12000mm |
Common Alternatives (Related Grades)
While P355NB is specific to gas cylinders per EN 10120, related pressure vessel plates for higher-temperature or thicker applications include P355GH (EN 10028-2) or P355NH/NL1 (EN 10028-3).
Key Features & Benefits for P355NB Hot Rolled Steel Plate
High Strength Capacity: With a minimum yield strength of 355 MPa, P355NB enables the construction of thinner-walled cylinders without compromising safety, reducing overall weight and material costs.
Excellent Weldability: Designed for welded gas cylinder manufacturing, this material supports conventional fusion welding processes without preheating, thanks to its controlled carbon equivalent (CEV) .
Superior Formability: Despite its high strength, P355NB maintains good elongation properties (min. 19-24%), making it suitable for deep drawing and cold forming operations .
P355NB Hot Rolled Steel Plate
Tight Impurity Control: Low phosphorus (≤0.025%) and sulfur (≤0.015%) content ensures excellent toughness and reduces the risk of cracking during fabrication .
Full Traceability: All products are supplied with EN 10204 Type 3.1 Mill Test Certificates, with 3.2 third-party inspection available upon request.
Uniform Mechanical Performance:Stable performance under cyclic pressure loads.Ensures long service life of pressure vessels
Production Process for P355NB Hot Rolled Steel Plate
Steelmaking (BOF/EAF)→ Strict chemical composition control
Continuous Casting→ Ensures internal soundness
Hot Rolling→ Achieves required plate dimensions
Controlled Rolling & Cooling→ Improves strength and toughness
Inspection & Testing
→ Tensile test
→ Impact test (if required)
→ Ultrasonic testing (UT)
Comparison with Other Grades
| Grade | Yield Strength | Application Level |
|---|---|---|
| P265NB | ≥ 265 MPa | Standard cylinders |
| P310NB | ≥ 310 MPa | Medium pressure |
| P355NB | ≥ 355 MPa | High pressure applications |
✔ P355NB is preferred when higher strength and safety are required
| Grade | Yield Strength (min) | Tensile Strength | Elongation (e<3mm) | Material No. | Application Level |
|---|---|---|---|---|---|
| P245NB | 245 MPa | 360-450 MPa | 26% | 1.0111 | Standard cylinders |
| P265NB | 265 MPa | 410-500 MPa | 24% | 1.0423 | Common LPG cylinders |
| P310NB | 310 MPa | 460-550 MPa | 21% | 1.0437 | High-pressure cylinders |
| P355NB | 355 MPa | 510-620 MPa | 19% | 1.0557 | Heavy-duty / high-capacity vessels |
Quality Assurance for P355NB Hot Rolled Steel Plate
Standard: EN 10120
Certification: EN 10204 3.1 / 3.2
Third-party inspection: SGS / BV / TUV
✔ Full traceability and strict QA system
✔ Meets international export requirements
Surface & Delivery Conditions
| Condition | Description |
|---|---|
| As-Rolled (Black) | Standard mill scale surface, suitable for further processing |
| Pickled & Oiled | Scale-free surface, ideal for precision laser cutting and welding |
| Normalized (+N) | Heat-treated condition for optimized grain structure and mechanical properties |
| Edge Condition | Mill edge or slit edge available |
Quality Assurance & Certification
We maintain strict quality control protocols to ensure compliance with international standards:
Standard: EN 10120:2008 (latest revision)
Inspection: 100% dimensional check; UT (Ultrasonic Testing) available upon request
Certification:
EN 10204 Type 3.1 (Mill Certificate)
EN 10204 Type 3.2 (Third-party inspection: SGS, BV, Lloyd's, etc.) – upon request
Traceability: Heat number clearly marked on each plate/bundle
Applications
P355NB is ideal for applications requiring maximum strength and safety:
- Large-Capacity LPG Cylinders: Industrial and commercial propane/butane tanks (50kg and above)
- High-Pressure Industrial Gas Cylinders: Oxygen, Nitrogen, Argon, and CO₂ storage
- CNG (Compressed Natural Gas) Cylinders: Automotive fuel tanks and stationary storage
- Hydraulic Accumulators: Pressure vessels for energy storage systems
- Fire Extinguisher Bodies: High-pressure extinguisher vessels
- Welded Pressure Vessels: Custom-engineered tanks for chemical and energy industries
Why Choose GNEE P355NB Steel?
Mill Direct Supply: Competitive pricing with stable, consistent quality.
Large Inventory: Ready-to-ship stock for standard sizes (2.0mm – 6.0mm).
Custom Processing: Precision slitting, cutting, and edge trimming services available.
Professional Export Packing: Water-proof paper + galvanized steel strapping + wooden edge protection ensures damage-free delivery.
Global Shipping Experience: Proven export track record to Asia, Middle East, Africa, and South America.
Contact us now to get a competitive offer on P355NB steel plates!
Contact now to get the P355NB steel votrt
What is the main advantage of P355NB over P265NB?
P355NB has significantly higher yield strength, making it more suitable for high-pressure applications.
Is P355NB easy to weld?
Yes, it has good weldability with proper preheating and welding procedures.
Can it be used for LPG storage tanks?
Yes, it is widely used for LPG and other gas storage systems requiring higher strength.
Do you offer UT testing?
Yes, ultrasonic testing can be provided based on customer requirements.
Can you supply cut-to-size plates?
Yes, we provide customized cutting and processing services.
Hot Tags: p355nb hot rolled steel plate for pressure vessels, China p355nb hot rolled steel plate for pressure vessels manufacturers, factory, P275NL2 P355NL1 P355NL2 P420NL2 For LPG Tank, Pressure Vessel Steel Plates P355NL1 P420NL2 P460NL1, P265GH Pressure Vessel Steel Plate, P355NL1 P355NL2 P420NL2 P460NL1 For Boiler Building, EN Pressure Vessel Plate, Quenched And Tempered Steel Plate P355QL1 P355QL2
Previous
P265GH Boiler PlateYou Might Also Like
Send Inquiry