ASTM A285 Pressure Vessel Carbon Steel Coil: Cost-Effective Steel for Medium-Pressure Systems
Product Overview
ASTM A285 pressure vessel carbon steel coil is a low-carbon steel designed for welded boilers, storage tanks, and heat exchangers. Available in Grade A (310–450 MPa), Grade B (345–485 MPa), and Grade C (380–515 MPa), it meets ASME Section VIII and EN 10028-2 P235GH standards. With a maximum thickness of 200mm, it offers excellent weldability for low-to-medium pressure applications up to 350°C.
Key Technical Specifications
1. Production & Dimensions
- Process:
- Hot-rolled: 2.75–200mm (±1.5% thickness tolerance)
- Cold-rolled: 0.2–3mm (±0.5% tolerance)
- Width: 45–2,200mm (compatible with laser cutting)
- Surface: Mill finish (Ra 12.5µm), galvanized (Z275 coating), or painted
2. Chemical Composition
| Grade | C (≤) | Mn (≤) | P/S (≤) |
|---|---|---|---|
| A | 0.17% | 0.98% | 0.025% |
| C | 0.28% | 0.98% | 0.025% |
Trace elements: Si ≤0.40%, Cu ≤0.20%
Mechanical Properties
| Grade | Thickness (mm) | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|---|---|
| A | 6–50 | ≥165 | 310–450 | 30 |
| B | 50–200 | ≥185 | 345–485 | 25 |
| C | 6–50 | ≥205 | 380–515 | 27 |
Tested per ASTM A370 (tensile) | Hardness: 120–160 HBW
Performance Advantages
- Weldability:
- Preheat temperature: Not required for thickness <25mm (SMAW with E6013 electrodes).
- PWHT: Optional for Grade A in non-cyclic service.
- Cost Efficiency:
- 30% cheaper than ASTM A516 for water storage tanks.
- ASME U-stamp certified for non-nuclear pressure vessels.
- Corrosion Resistance:
- Atmospheric corrosion rate: 0.05 mm/year in rural environments.
- Compatible with coal-tar epoxy coatings for marine applications.
- Formability:
- Minimum bend radius: 1.5x thickness (Grade A, cold-forming).
- No cracking in flange operations up to 10% elongation.
Applications
| Industry | Use Case | Recommended Grade |
|---|---|---|
| Water Treatment | Potable water tanks | Grade A |
| Oil & Gas | Fuel storage spheres | Grade B |
| Chemicals | Low-pressure reactor shells | Grade C |
Global Equivalents
| ASTM A285 | EN 10028 | JIS G3115 | GB 713 |
|---|---|---|---|
| Grade A | P235GH | SB410 | Q245R |
| Grade C | P275GH | SB450 | Q345R |
Sustainability & Compliance
- Recycled Content: 85% (mill-certified)
- RoHS Compliance: Lead-free, Mercury <0.0002%
- Certifications: ISO 9001, ISO 14001, ASME Section II
Packing And Delivery
