ASTM A515 Pressure Vessel Steel Coil: High-Temperature Carbon Steel for Boilers & Process Equipment
A515 Pressure Vessel Carbon Steel Coil Product Overview
ASTM A515 (ASME SA-515) is a carbon-manganese steel designed for welded pressure vessels operating at 400–650°C, including boilers, heat exchangers, and refinery reactors. Available in Grade 60 (415–550 MPa), Grade 65 (450–585 MPa), and Grade 70 (485–620 MPa), it meets ASME BPVC Section VIII and EN 10028-2 P355NH standards. With superior creep resistance and impact toughness at -60°C, it’s ideal for fossil fuel power plants and petrochemical processing.
Key Technical Specifications
1. Production & Dimensional Tolerances
- Manufacturing:
- Hot-rolled: 2.75–100mm (±1.2% thickness tolerance per ASTM A20)
- Cold-rolled: 0.2–3mm (±0.3% tolerance for precision forming)
- Width: 45–2,200mm (compatible with CNC laser/waterjet cutting)
- Surface: Normalized finish (Ra ≤6.3µm) or galvanized (Z600 coating)
2. Chemical Composition
| Grade | C (%) | Mn (%) | Si (%) | P/S (≤%) | Key Alloy Features |
|---|---|---|---|---|---|
| 60 | 0.24–0.31 | ≥0.98 | 0.13–0.45 | 0.035 | Balanced C-Mn for weldability |
| 70 | 0.31–0.35 | ≥1.30 | 0.13–0.45 | 0.035 | Enhanced Mn for creep strength |
Trace elements: Cu ≤0.20%, Ni ≤0.25% (Grade 70)
Mechanical Properties
| Grade | Tensile (MPa) | Yield (MPa) | Elongation (%) (50mm) | Impact Energy (J @ -60°C) |
|---|---|---|---|---|
| 60 | 415–550 | ≥220 | 25 | 27 |
| 70 | 485–620 | ≥260 | 21 | 18 |
Test methods:
- Tensile: ASTM A370 (strain rate 0.015/min)
- Impact: ASTM E23 (Charpy V-notch @ specified temps)
Performance Advantages
- High-Temperature Stability:
- Creep rupture strength:
- Grade 60: 65 MPa @ 500°C (100,000h)
- Grade 70: 85 MPa @ 500°C (100,000h)
- Thermal expansion: 12.5 µm/m·°C (20–400°C)
- Creep rupture strength:
- Cryogenic Toughness:
- Ductile-to-brittle transition: Below -45°C (Grade 60)
- FATT (Fracture Appearance Transition Temp): -20°C (Grade 70)
- Weldability:
- Preheat: Not required for thickness <32mm (GMAW with ER70S-6 wire)
- PWHT: 595–650°C for stress relief (mandatory for Grade 70)
- Cost Efficiency:
- 20% lower lifecycle cost vs. stainless 304L in coal-fired boiler drums
- ASME U2-stamp certified for pressure vessels up to 6.9 MPa
Applications
| Industry | Use Case | Recommended Grade |
|---|---|---|
| Power Plants | Steam drum shells (450°C, 5 MPa) | Grade 70 |
| Oil Refining | Delayed coker reactors | Grade 65 |
| Chemicals | Ammonia synthesis converters | Grade 60 |
Global Equivalents
| ASTM A515 | EN 10028 | JIS G3115 | GB 713 | DIN 17100 |
|---|---|---|---|---|
| Grade 60 | P275NH | SB410 | 20g | 1.0425 |
| Grade 70 | P355NH | SB480 | 16Mng | 1.0844 |
Sustainability & Compliance
- Recycled Content: 82% (mill-certified, per ISO 14021)
- RoHS Compliance: Lead <0.01%, Hexavalent Cr <0.001%
- Certifications: ISO 3834-2 (Welding), AD 2000-Merkblatt
Packing And Delivery
