ASTM A515 Grade 60/65/70 Carbon Steel Plate
ASME-Certified High-Temperature Vessel Solution
Material Overview & Core Advantages
ASTM A515 specifies carbon steel plates for 500°C high-temperature pressure vessels in power generation and hydrocarbon processing. With tensile strengths ranging from 415 MPa (Grade 60) to 620 MPa (Grade 70), these normalized steels meet ASME SA-515 requirements for boiler drums and heat exchangers.
Key Benefits:
- Cost Efficiency: 35% lower material cost vs. chromium-moly alloys.
- Global Equivalents: EN 10028-2 P265GH (Grade 60), JIS G3103 SB480 (Grade 70).
- Weldability: 50% faster deposition rates with E7018 electrodes.
Technical Specifications
1. Chemical Composition (ASME SA-515 Standard)
| Grade | C Range | Mn ≥ | CEV* | Max Thickness |
|---|---|---|---|---|
| Grade 60 | 0.24–0.31% | 0.98% | 0.43 | 150mm |
| Grade 65 | 0.28–0.33% | 0.98% | 0.47 | 200mm |
| Grade 70 | 0.31–0.35% | 1.30% | 0.53 | 250mm |
| *CEV = C + (Mn)/6 + (Cr + Mo + V)/5 |
2. Mechanical Properties
| Grade | Tensile (MPa) | Yield (MPa) | Elongation (%) | Impact (-30°C) |
|---|---|---|---|---|
| Grade 60 | 415–550 | 220 | 25 | 27 J |
| Grade 65 | 450–585 | 240 | 23 | 32 J |
| Grade 70 | 485–620 | 260 | 21 | 35 J |
Physical Properties:
- Density: 7.80 g/cm³ (0.282 lb/in³)
- Thermal Conductivity: 46.8 W/m·K (20–400°C)
Production & Fabrication
1. Manufacturing Methods
- Normalizing: 890–940°C × 1h/25mm (mandatory for Grade 70).
- Post-Weld Heat Treatment: 595–650°C × 1hr/25mm (ASME VIII).
2. Surface Treatments
| Process | Technical Parameters | Industry Use Case |
|---|---|---|
| Pickling | HNO3/HF acid bath (ASTM A380) | Food processing tanks |
| Metal Spraying | 150µm Al coating (ISO 2063) | Coastal power plants |
Industrial Applications
1. Power Generation
- Boiler Drums: Grade 65 plates (thickness 40–120mm, PWHT required).
- Steam Piping: Grade 70 seamless tubes (ASME B36.10).
2. Oil Refining
| Component | Material Grade | Operational Limits |
|---|---|---|
| Fractionation Towers | Grade 60 | 380°C @ 6MPa |
| Coker Drums | Grade 70 | 450°C @ 3.5MPa |
3. Chemical Processing
- Ammonia Reactors: Grade 65 forged heads (HIC tested).
- Sulfuric Acid Coolers: Grade 60 clad plates (ASME Section IX).
Quality Assurance
- Testing Protocols:
- Ultrasonic testing (SA-578 Level II for thickness >50mm).
- Hardness control: HB 120–190 (Grade 60), HB 140–210 (Grade 70).
- Certifications:
- ASME U2 Stamp + EN 10204 3.1 Certificate.
- ISO 3834-2 Welding Quality Management.
Delivery & Storage
- Dimensions:
- Width: 1,500–3,500mm (max length: 15m).
- Thickness tolerance: ±0.25mm (cold-rolled), ±0.7% (hot-rolled).
- Packaging: VCI film + desiccant packs (18-month shelf life).
Welding Advisory: Use E7018-G electrodes with 80–120°C preheat for Grade 70*
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