P355GH boiler plate steel plate plays a critical role in determining its performance in high-temperature and high-pressure environments. As a non-alloy pressure vessel steel under the EN 10028-2 standard, P355GH steel is widely used in boilers, pressure vessels, and industrial equipment.
P355GH boiler plate steel plate
With its balanced composition and controlled impurity levels, P355GH boiler plate offers excellent weldability, strength, and resistance to cracking, making it a reliable choice for demanding engineering applications.
What is P355GH Boiler Plate Steel?
P355GH is a European standard steel grade designed for pressure vessel applications at elevated temperatures. The "P" represents pressure purposes, while "355" indicates a minimum yield strength of 355 MPa.
This material is often considered equivalent to:
- Chinese grade Q345R
- Japanese grade SPV355 / SPV36
However, slight differences in composition and standards may exist depending on regional requirements.
Chemical Composition of P355GH Boiler Plate Steel Plate
The chemical composition of P355GH steel plate is carefully controlled to ensure strength, weldability, and long-term performance.
| Element | Content (%) |
|---|---|
| C | 0.10 – 0.22 |
| Si | ≤ 0.60 |
| Mn | 1.10 – 1.70 |
| P | ≤ 0.025 |
| S | ≤ 0.010 |
| N | ≤ 0.012 |
| Cr | ≤ 0.30 |
| Cu | ≤ 0.30 |
| Mo | ≤ 0.08 |
| Nb | ≤ 0.040 |
| Ni | ≤ 0.30 |
| Ti | ≤ 0.03 |
| V | ≤ 0.02 |
Low sulfur and phosphorus levels improve ductility and reduce the risk of cracking, while alloying elements enhance toughness and stability.
Why Chemical Composition Matters
The controlled chemical composition directly affects the performance of P355GH boiler plate steel plate:
- Weldability: Low carbon and controlled alloying elements reduce welding defects
- Strength: Manganese and micro-alloying elements improve mechanical properties
- Crack Resistance: Low S and P improve resistance to brittle fracture and HIC
- High-Temperature Performance: Stable composition ensures performance up to 400°C
Specifications of P355GH Steel Plate
P355GH boiler plates are available in a wide range of sizes to meet different industrial requirements:
- Thickness: 8 – 300 mm
- Width: 1500 – 4020 mm
- Length: 3000 – 18000 mm
Plates can be customized based on project needs.
Delivery Condition of P355GH Boiler Plate
P355GH steel plates are typically supplied in the following conditions:
- AR (As Rolled)
- CR (Controlled Rolled)
- N (Normalized)
The normalized condition is most commonly used, as it improves toughness and ensures uniform microstructure.
Key Features of P355GH Boiler Plate
P355GH steel plate offers a combination of mechanical strength and fabrication advantages:
- Excellent plasticity and toughness
- Good cold bending performance
- Outstanding weldability
Stable performance under high temperature and pressure
Applications of P355GH Steel Plate
Due to its reliable properties, P355GH boiler plate steel is widely used in:
- Pressure vessels and boilers
- Heat exchangers
- Petrochemical equipment
- Oil and gas pipelines
- Power plant systems
Nuclear-related containment structures
The chemical composition of P355GH boiler plate steel plate is the key factor behind its excellent weldability, strength, and high-temperature performance.
With strict control of elements and advanced production processes, P355GH steel remains a preferred material for pressure vessel applications worldwide.
As a professional P355GH steel plate supplier, we provide customized sizes, fast delivery, and competitive pricing. Contact us today for detailed specifications and a quotation.
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What is P355NH material?
P355NH steel is characterised by good weldability and high resistance to brittle cracking.
What is the difference between p355 and S355 steel?
Mechanical Properties: P355GH: Has a minimum yield strength of 355 MPa and is optimized for high-temperature environments in pressure vessels, but has lower toughness in cold conditions. S355J2: Also has a yield strength of 355 MPa but is optimized for structural applications requiring impact toughness.
What is the difference between S355H and s355nh?
Purpose: Similar to S355H, it is used for structural hollow sections, but the "N" indicates that the steel is normalized or normalized rolled, which improves its toughness and weldability by refining the grain structure.
What is the difference between P355GH and P355NH?
P355GH steel is used worldwide by fabricators of welded pressure vessels, industrial boilers and heat exchangers and is engineered to work well in elevated temperature service. P355NH steel is normalized weldable fine grain steel flats under EN 10028-3: 2009 standard.