What is P235GH Pressure Vessel Steel Plate?
P235GH (Material No. 1.0345) is a non-alloy, aluminum-killed, fine-grain steel for pressure purposes, specified in EN 10028-2:2017. The "P" designation indicates pressure vessel application, while "GH" denotes specified elevated-temperature properties. With a nominal minimum yield strength of 235 MPa, P235GH offers excellent weldability, good toughness at low temperatures, and reliable performance at moderately elevated temperatures, making it one of the most widely used grades for boiler and pressure vessel fabrication.
Core Mechanical and Metallurgical Properties of P235GH Steel Plate
- Optimized Balance of Strength and Ductility: Minimum yield strength of 235 MPa, tensile strength range of 360–480 MPa, and minimum elongation of 22% (A5), ensuring high structural integrity under complex multi-axial loading conditions.
- Superior Notch Toughness: Guaranteed Charpy V-notch (CVN) impact energy values at specified test temperatures, preventing premature brittle fracture in pressure-retaining equipment.
- Corrosion Resistance: Stable chemical stability and resistance to degradation in acidic, alkaline, and saline process environments across petrochemical and chemical processing applications.
- Excellent Weldability: Low carbon equivalent value (CEV < 0.40%), minimizing preheat requirements and susceptibility to cold cracking; compatible with SMAW, SAW, and other standard fusion welding processes.
- Superior Fabricability: Excellent cold and hot formability, allowing for ease of shearing, bending, roll-forming, and machining during vessel shell and head fabrication.
- Elevated Temperature Capability: Engineered for design service temperatures up to 400°C (752°F), offering robust creep resistance and oxidation stability under sustained thermal loads.
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P235GH Standard & Equivalences
| Current standard | EN 10028-2:2017 |
|---|---|
| Material number | 1.0345 |
| Near-equivalent ASTM | A285 Grade C (not identical) |
| Near-equivalent Japanese | SPV 235 (not identical) |
P235GH Pressure Vessel Steel Plate Specification
| Parameter | Range |
|---|---|
| Thickness | 5 – 300 mm |
| Width | 1,500 – 4,050 mm |
| Length | 3,000 – 15,000 mm |
| Delivery condition | +N (Normalized) / +AR (As-rolled) |
P235GH PVQ Steel Plate Chemical Composition
| C | ≤0.16 |
| Si | ≤0.35 |
| Mn | 0.60 to 1.20 |
| P | 0.025 |
| S | 0.015 |
| Al | ≤0.020 |
| N | ≤0.012 |
| Cr | ≤0.30 |
| Cu | ≤0.30 |
| Mo | ≤0.08 |
| Nb | ≤0.020 |
| Ni | ≤0.30 |
| Ti | 0.03 |
| Vi | ≤0.02 |
P235GH vessel steel plate mechanical property
| TYPE | THICKNESS (MM) | YIELD STRENGTH MPA (MIN) |
TENSILE STRENGTH MPA |
ELONGATION % (MIN) |
IMPACT ENERGY (KV J) (MIN) |
||
|---|---|---|---|---|---|---|---|
| -20° | 0° | +20° | |||||
| Normalized | ≤ 16 mm |
235 Mpa | 360 - 480 Mpa | 24 min | 27 | 34 | 40 |
| 16> to ≤40 mm | 225 Mpa | 360 - 480 Mpa | 24 min | 27 | 34 | 40 | |
| 40> to ≤60 mm | 215 Mpa | 360 - 480 Mpa | 24 min | 27 | 34 | 40 | |
| 60> to ≤100 mm | 200 Mpa | 360 - 480 Mpa | 24 min | 27 | 34 | 40 | |
| 100> to ≤150 mm | 185 Mpa | 360 - 480 Mpa | 24 min | 27 | 34 | 40 | |
| 150> to ≤250 mm | 170 Mpa | 360 - 480 Mpa | 24 min | 27 | 34 | 40 | |
P235GH Non Alloy Steel Plate Delivery Conditions & Processing
| Delivery condition | +N (Normalized) - standard / +AR (As-rolled) - upon agreement |
|---|---|
| Normalization temperature | 890 – 950 °C |
| Hot forming temperature | 850 – 1,100 °C |
| PWHT temperature | 580 – 620 °C (when required) |
| Preheat (>20mm) | 100 – 150 °C recommended |
P235GH Carbon Equivalent & Weldability
| Parameter | Value |
|---|---|
| CEV formula (IIW) | C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15 |
| Max CEV (EN 10028-2, heat analysis) | 0.41 |
| Typical CEV (actual production) | 0.35 – 0.38 |
| Welding processes | SMAW, SAW, GMAW, GTAW, FCAW |
| Preheat (t ≤ 20 mm) | Not required (ambient temperature ≥ 5 °C) |
| Preheat (t > 20 mm) | 100 – 150 °C |
| Max interpass temperature | 250 °C |
| PWHT temperature range | 580 – 620 °C |
| Filler metal example | EN ISO 2560-A: E 42 0 B / AWS A5.1: E7018 |
Key Applications of P235GH Steel Plate
Owing to its versatile mechanical and elevated-temperature properties, EN 10028-2 P235GH steel plate is widely specified across the following industrial sectors:
- Petrochemical & Oil Gas: Specified for the fabrication of pressure vessels, process reactors, storage tanks, and heat exchangers operating under high-pressure, elevated-temperature, and corrosive service environments.
- Power Generation: Used in critical boiler components, including boiler drums, headers, steam mains, and pressure piping, ensuring reliable long-term operation under high-temperature and high-pressure cyclic loading.
- Nuclear Power Industry: Applied in secondary-circuit pressure vessels, auxiliary tanks, and safety-critical containment piping where stringent quality assurance, high structural integrity, and corrosion resistance are mandatory.
- General Engineering & Shipbuilding: Specified for marine pressure vessels, specialized hull structures, high-pressure piping manifolds, heavy structural supports for bridges, and heavy machinery fabrications.
Why Choose GNEE Steel for P235GH?
GNEE Steel has 18+ years of experience in exporting hot‑rolled steel plates. With stable mill resources and multi‑warehouse stock, we supply carbon & alloy hot‑rolled plates complying with ASTM, EN, GB and other international standards, widely used for pressure vessels, engineering machinery, steel structures, shipbuilding and more.
- Our exclusive export standard packaging includes: waterproof film + moisture-proof paper + solid wood pallet + corner protectors.
- Controllable delivery time: standard specifications are shipped within 3-7 days; urgent orders can be prioritized and delivered expedited to ensure no delays to client project schedules.
- Flexible customization & processing: Custom sizes per your drawings. Cutting, leveling, shot‑blasting and surface pretreatment are available for your direct processing needs.
We provide value-added services: cutting to size, beveling, UT testing (EN 10160), HIC testing, and NACE compliance documentation.
FAQ
Q: What does "P235GH" stand for?
A: "P" = Pressure vessel steel; "235" = minimum yield strength of 235 MPa at room temperature for t≤16mm; "G" = specified at elevated temperatures; "H" = high-temperature application.
Q: Is P235GH the same as ASTM A516 Gr.60?
A: No. While they are near-equivalents in some applications, they differ in chemical composition limits, impact energy requirements, and gauge length conventions. P235GH is certified per EN 10028-2, while A516 Gr.60 is certified per ASTM A20/A516. They should not be treated as interchangeable without engineering review.
Q: What is the carbon equivalent (CEV) of P235GH?
A: CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15. For P235GH, the typical CEV is approximately 0.35–0.41, indicating good weldability.
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