ASTM A202 Pressure Vessel Carbon Steel Coil: High-Strength Steel for Boilers & Pressure Systems
Product Overview
ASTM A202 pressure vessel carbon steel coil is a chromium-manganese-silicon alloy steel designed for boilers, pressure vessels, and heat exchangers. Available in Grade A (515–655 MPa) and Grade B (585–760 MPa), it meets ASME Section VIII and EN 10028-2 P295GH standards. With a maximum thickness of 50mm (2″), it resists creep up to 400°C and reduces welding costs by 20% compared to stainless alternatives.
Key Technical Specifications
1. Production & Dimensions
- Process:
- Hot-rolled: 2.75–50mm (±1.2% thickness tolerance)
- Cold-rolled: 0.2–3mm (±0.4% tolerance)
- Width: 45–2,200mm (compatible with CNC plasma cutting)
- Surface: Pickled (Ra 3.5µm), shot-blasted (Sa 2.5), or PVC-laminated
2. Chemical Composition
| Grade | C (≤) | Si | Mn | Cr | P/S (≤) |
|---|---|---|---|---|---|
| A | 0.17% | 0.54–0.96% | 0.97–1.52% | 0.31–0.64% | 0.035% |
| B | 0.25% | 0.54–0.96% | 0.97–1.52% | 0.31–0.64% | 0.035% |
Trace elements: Cu ≤0.30%, Ni ≤0.25%
Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) (200mm) | Hardness (HBW) |
|---|---|---|---|---|
| A | 515–655 | ≥310 | ≥19 | 170–220 |
| B | 585–760 | ≥325 | ≥18 | 190–240 |
Tested per ASTM A370 (tensile) & ASTM E10 (Brinell hardness)
Performance Advantages
- High-Temperature Resilience:
- Creep strength: 120 MPa at 400°C (Grade B, 10,000h).
- Thermal conductivity: 45 W/m·K (Grade A at 300°C).
- Pressure Resistance:
- Burst pressure: 85 bar (Grade B, 20mm thickness).
- ASME U-stamp certified for nuclear auxiliary vessels.
- Weldability:
- Preheat temperature: 50°C (SMAW with E7018 electrodes).
- PWHT (Post-Weld Heat Treatment): Optional for Grade A.
- Corrosion Performance:
- Oxidation rate: 0.12 mm/year in steam (150°C, pH 8–9).
- Compatible with thermal spray aluminum (TSA) coatings.
Applications
| Industry | Use Case | Recommended Grade |
|---|---|---|
| Oil & Gas | LNG storage tanks | Grade B |
| Power Plants | Steam drum fabrication | Grade A |
| Chemicals | Reactor jackets | Grade B |
Global Equivalents
| ASTM A202 | EN 10028 | JIS G3115 | GB 713 |
|---|---|---|---|
| Grade A | P295GH | SBV1A | Q345R |
| Grade B | P355GH | SBV1B | Q370R |
Sustainability & Compliance
- Recycled Content: 76% (mill-certified)
- RoHS Compliance: Cadmium-free, Hexavalent Chromium <0.01%
- Certifications: ASME Section II, ISO 3834-2
Packing And Delivery
