Product Overview
What is P355GH?
P355GH
P355GH is a fine-grained, non-alloy pressure vessel steel specified under the EN 10028-2 standard. Designed for high-temperature service, this grade is the European standard equivalent to the global workhorses of the pressure vessel industry.
The name P355GH breaks down as follows
P = Pressure (Pressure vessel application)
355 = Minimum yield strength (355 MPa) at room temperature
GH = High-temperature and creep-resistant properties.
Available Dimensions And Key Delivery Conditions
Thickness: 6mm - 250mm
Width: 1500mm - 4000mm
Length: 6000mm - 12000mm (or customized)
Normalized (N) – Standard
Normalized Rolled (N)
Choosing the Right Grade: Expert Advice
One-stop steel procurement
Choose P355GH if: You are exporting to European projects, need certified compliance with EN standards, or require high-temperature strength (up to 400°C).
Choose Q345R if: The project is in Asia or using Chinese funding, and budget is a primary constraint (though P355GH is generally preferred for EU markets).
Choose A516 Gr.70 if: The working environment involves low temperatures or wet H2S (Sour Service). A516 Gr.70 handles sub-zero conditions better than standard P355GH.
Key Specifications & Tolerances
| Thickness (mm) | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|---|
| 8 – 16 | ≥ 355 | 490 – 630 | ≥ 22 |
| 16 – 40 | ≥ 345 | 490 – 630 | ≥ 22 |
| 40 – 60 | ≥ 335 | 490 – 630 | ≥ 21 |
| 60 – 100 | ≥ 315 | 470 – 610 | ≥ 20 |
| 100 – 150 | ≥ 295 | 460 – 600 | ≥ 19 |
| Element | C | Si | Mn | P (max) | S (max) | Al (total) |
|---|---|---|---|---|---|---|
| Standard (%) | ≤ 0.20 | ≤ 0.60 | 1.10 - 1.70 | 0.025 | 0.010 | ≥ 0.020 |
Technical Comparison: P355GH vs. Q345R vs. A516 Gr.70
| Specification | P355GH (Europe) | Q345R (China GB 713) | A516 Gr.70 (ASME/ASTM) |
|---|---|---|---|
| Governing Standard | EN 10028-2 | GB 713 | ASME SA-516 / ASTM A516M |
| Yield Strength | 355 MPa | 345 MPa | 260 MPa |
| Tensile Strength | 490-630 MPa | 510-640 MPa | 485-620 MPa |
| Carbon Equivalent (CEV) | Low (Excellent Weldability) | Medium | Very Low (Best for low temp) |
| Impact Test Temp | 0°C (Standard) | -20°C (Standard) | -20°C / -40°C (Optional) |
| Application Focus | High Temperature | General Boiler | Low Temperature / Sour Service |
Application & Industry Use Cases
P355GH is mandatory for critical safety components where failure is not an option.
Boiler & Steam Industry
Steam drums
Headers and collectors
Support structures for boilers
Oil & Gas Petrochemical
LPG storage tanks (Propane/Butane)
Catalytic crackers
Heat exchangers
Industrial Equipment
Fire-fighting pressure vessels
Accumulators
Gas cylinders
why choose us?
Direct Mill Source: We supply directly from state-owned mills (Baowu/Ansteel) with 100% traceability.
Certifications: EN 10204 3.1 (Mill Certificate), available with 3.2 inspection by third party (BV, SGS, TUV).
Value-Added Services: We offer cutting (laser/plasma), drilling, and welding groove preparation to save your local labor costs.
Inventory: Over 500 tons of P355GH in ready stock (8mm - 60mm) for urgent projects.
Get the quotation within 24 hours
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our Partners
We trusted by
User Evaluation
Marco R.
Pressure Vessel Manufacturer, Italy
Ahmed K.
Procurement Manager, UAE
Dmitri S.
Welding Engineer, Kazakhstan
FAQ
01.Can P355GH be used as a direct replacement for Q345R?
Yes, but with caution. P355GH and Q345R have similar strength levels, but P355GH typically requires stricter S and P content control, making it more suitable for high-temperature European design codes (EN 13445). If your engineering specification calls for GB 713, you must verify with your design institute. Many clients successfully use P355GH for Q345R-equivalent applications after approval.
02.Do you accept small quantity orders (e.g., 5-10 tons)?
03.What documents do you provide for customs and quality traceability?
We provide complete shipping and quality documents, including:
Commercial Invoice & Packing List
EN 10204 Type 3.1 Mill Test Certificate (showing actual ladle analysis and mechanical test results)
Origin Certificate (if required for EU preferential tariffs)
Third-party inspection report (SGS, BV, or TUV, at buyer's cost)
04.How long is the typical lead time for P355GH plates?
For standard thicknesses (8–60mm) in stock: 7–15 days after deposit.
For thicker plates (65–250mm) or special widths: 25–35 days (production + mill release).
Expedited shipping (air or LCL sea) is available for urgent projects.
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