ASTM A516 Pressure Vessel Carbon Steel Coil: Reliable Carbon Steel for Low/Medium-Temperature Pressure Systems
Product Overview
ASTM A516 (ASME SA-516) is a carbon-manganese steel designed for welded pressure vessels operating at -45°C to 345°C, including LPG tanks, boilers, and heat exchangers. Available in Grades 55 (380–515 MPa), 60 (415–550 MPa), 65 (450–585 MPa), and 70 (485–620 MPa), it meets ASME BPVC Section VIII and EN 10028-2 P355GH standards. With superior notch toughness and weldability, it’s widely used in oil refineries, gas storage, and chemical processing plants.
Key Technical Specifications
1. Production & Dimensional Tolerances
- Manufacturing:
- Hot-rolled: 2.75–100mm (±1.5% thickness tolerance per ASTM A20)
- Cold-rolled: 0.2–3mm (±0.3% tolerance for precision forming)
- Width: 45–2,200mm (compatible with CNC plasma/oxy-fuel cutting)
- Surface: Normalized finish (Ra ≤12.5µm) or galvanized (Z275 coating)
2. Chemical Composition
| Grade | Thickness (mm) | C (≤%) | Mn (%) | Si (%) | P/S (≤%) |
|---|---|---|---|---|---|
| 55 | 6–12.5 | 0.18 | 0.55–0.98 | 0.13–0.45 | 0.035 |
| 70 | >50 | 0.30 | 0.85–1.20 | 0.13–0.45 | 0.035 |
Trace elements: Cu ≤0.20%, Ni ≤0.15% (Grade 70)
Mechanical Properties
| Grade | Tensile (MPa) | Yield (MPa) | Elongation (%) (50mm) | Impact Energy (J @ -45°C) |
|---|---|---|---|---|
| 55 | 380–515 | ≥205 | 27 | 34 |
| 70 | 485–620 | ≥260 | 21 | 22 |
Test methods:
- Tensile: ASTM A370 (strain rate 0.015/min)
- Impact: ASTM E23 (Charpy V-notch @ specified temps)
- Hardness: 130–190 HBW (Brinell)
Performance Advantages
- Cryogenic Toughness:
- Ductile-to-brittle transition: Below -45°C (Grade 55)
- FATT (Fracture Appearance Transition Temp): -20°C (Grade 70)
- Weldability:
- Preheat: Not required for thickness <32mm (SMAW with E7018 electrodes)
- PWHT: 595–650°C for stress relief (recommended for Grade 70)
- Corrosion Resistance:
- Atmospheric corrosion rate: 0.07 mm/year in industrial environments
- Compatible with epoxy coatings for marine exposure
- Cost Efficiency:
- 25% lower cost vs. stainless 304L in LPG storage tanks
- ASME U-stamp certified for pressure vessels up to 5.5 MPa
Applications
| Industry | Use Case | Recommended Grade |
|---|---|---|
| Oil & Gas | Propane storage spheres (-30°C) | Grade 55 |
| Power Plants | Deaerator tanks (150°C, 3 MPa) | Grade 60 |
| Chemicals | Ammonia synthesis vessels | Grade 70 |
Global Equivalents
| ASTM A516 | EN 10028 | JIS G3115 | GB 713 | DIN 17155 |
|---|---|---|---|---|
| Grade 55 | P275GH | SB410 | Q345R | 1.0473 |
| Grade 70 | P355GH | SB450 | Q370R | 1.8941 |
Sustainability & Compliance
- Recycled Content: 80% (mill-certified, per ISO 14021)
- RoHS Compliance: Lead <0.01%, Hexavalent Cr <0.001%
- Certifications: ISO 3834-2 (Welding), PED 2014/68/EU
Packing And Delivery
