ASTM A203 Pressure Vessel Carbon Steel Coil: Nickel-Alloy Steel for Extreme Temperatures
Product Overview
ASTM A203 pressure vessel carbon steel coil is a nickel-alloyed steel engineered for cryogenic and high-temperature pressure systems. Available in Grades A, B, D, E, and F, it meets ASME BPVC Section II and EN 10028-4 P355NH standards. With nickel content from 2.03% (Grade A) to 3.82% (Grade F), it maintains ductility down to -50°C and resists thermal fatigue up to 370°C.
Key Technical Specifications
1. Production & Dimensions
- Process:
- Hot-rolled: 2.75–100mm (±1.3% thickness tolerance)
- Cold-rolled: 0.2–3mm (±0.5% tolerance)
- Width: 45–2,200mm (compatible with CNC flame cutting)
- Surface: Shot-peened (Ra 5µm), pickled (Ra 2.5µm), or epoxy-coated
2. Chemical Composition
| Grade | C (≤) | Si | Mn (≤) | Ni | P/S (≤) |
|---|---|---|---|---|---|
| A | 0.23% | 0.13–0.45% | 0.88% | 2.03–2.57% | 0.025% |
| F | 0.23% | 0.13–0.45% | 0.88% | 3.18–3.82% | 0.025% |
Trace elements: Mo ≤0.10%, Cu ≤0.20%
Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) (200mm) | Impact Energy (J @ -45°C) |
|---|---|---|---|---|
| A | 450–585 | ≥255 | ≥23 | 34 |
| F | 515–690 | ≥345 | ≥20 | 27 |
Tested per ASTM A370 (tensile) & ASTM E23 (Charpy V-notch)
Performance Advantages
- Low-Temperature Toughness:
- CTOD (Crack Tip Opening): 0.15mm (Grade D, -30°C).
- Suitable for LNG storage tanks and Arctic pipelines.
- High-Temperature Stability:
- Creep limit: 95 MPa at 350°C (Grade E, 10,000h).
- Oxidation rate: 0.08 mm/year in steam (200°C).
- Weldability:
- Preheat temperature: 100°C (GTAW with ERNiCr-3 filler).
- PWHT (Post-Weld Heat Treatment): Mandatory for Grade F.
- Cost Efficiency:
- Reduces wall thickness by 18% vs. stainless steel in ammonia reactors.
- ASME U2-stamp certified for nuclear containment vessels.
Applications
| Industry | Use Case | Recommended Grade |
|---|---|---|
| Oil & Gas | LNG cryogenic tanks | Grade D, F |
| Chemicals | Ammonia synthesis converters | Grade E |
| Power Plants | High-pressure steam drums | Grade B |
Global Equivalents
| ASTM A203 | EN 10028 | JIS G3128 | GB 3531 |
|---|---|---|---|
| Grade A | P275NH | SL2N255 | 16MnDR |
| Grade F | P460NH | SL2N345 | 09MnNiDR |
Sustainability & Compliance
- Recycled Content: 82% (mill-certified)
- RoHS Compliance: Lead-free, Mercury <0.0001%
- Certifications: ASME Section VIII Div.1, ISO 9712
Packing And Delivery
