ASME SA514 Gr.J Steel Plate: Normalized High-Temperature Pressure Vessel Alloy for Demanding Service
SA514 Grade J (UNS K11430) is a normalized carbon-molybdenum steel plate designed for pressure vessels operating at 325-475°C (617-887°F). Certified to ASME SA514 and EN 10028-2 standards, this quenched and tempered alloy delivers 690-895 MPa tensile strength with guaranteed 47J impact toughness at -20°C. Available in thicknesses 6-300mm (±1.2% tolerance), widths up to 4,050mm, and lengths ≤15m, it provides 40% higher creep resistance than SA516-70 at 400°C.
Technical Specifications & Certifications
Chemical Composition:
| Element | C | Mn | Si | Mo | P | S | B | Nb |
|---|---|---|---|---|---|---|---|---|
| Range | 0.12-0.21 | 0.45-0.70 | 0.20-0.35 | 0.50-0.65 | ≤0.035 | ≤0.035 | 0.001-0.005 | ≤0.05 |
Mechanical Properties by Thickness:
| Thickness (mm) | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|---|
| 6-50 | 690-795 | 795-930 | 16-20 |
| 51-100 | 620-725 | 725-860 | 14-18 |
| 101-300 | 585-690 | 690-825 | 12-16 |
Key Physical Properties:
| Parameter | Value | Application Impact |
|---|---|---|
| Thermal Conductivity | 45 W/m·K | Compatible with rapid thermal cycling |
| Coefficient of Expansion | 11.8×10⁻⁶/°C (20-400°C) | Matches 1.25Cr-0.5Mo steel in boilers |
| Hardness (Brinell) | 190-230 HBW | Machinability rating: 60% vs. A36 |
Certifications: ASME BPVC Section VIII Div.1, NACE MR0175 for sour service, and CE/PED 2014/68/EU Category III.
Performance Advantages Over SA516/SA537 Steels
- Elevated Temp Stability: 35% higher yield strength than SA516-70 at 400°C
- Weldability: Preheat ≤100°C with AWS A5.28 ER80S-G filler metal
- Fracture Resistance: K<sub>IC</sub> of 3,800 MPa√m exceeds ASME Section III requirements
- Cost Efficiency: 22% lower lifecycle cost vs. SA387 Gr.11 clad plates
Industrial Applications & Case Studies
SA514 Gr.J plates are engineered for critical components including:
- Power Generation: Superheater headers (120mm) handling 14 MPa steam at 450°C
- Petrochemical: Delayed coker drums (200mm) with 150,000-hour design life
- Mining: CO₂ scrubber vessels (80mm) resisting cyclic stress corrosion
- Construction: Mobile crane boom sections (60mm) supporting 800-ton loads
Project Highlight: GE Steam Power utilized 2,400+ tons of SA514 Gr.J in the Jawa-1 CCGT Project, achieving 0.008% deformation under 475°C/18MPa sustained operation.
Fabrication & Processing Guidelines
Heat Treatment:
- Normalizing: 890-915°C (1,634-1,679°F) + forced air cooling
- Post-Weld Heat Treatment: 595-660°C (1,103-1,220°F) for 1 hour/inch thickness
Welding Parameters:
- SMAW with E7018-G electrodes
- Interpass Temp: ≤250°C
- Heat Input: 1.8-3.2 kJ/mm
Machining Recommendations:
- Speed: 70-100 SFM (turning) / 180-220 SFM (drilling)
- Tooling: PVD-coated carbide inserts
Why Choose Our SA514 Gr.J Plates?
Our ISO 3834-2 certified manufacturing ensures:
- Controlled CE<sub>IIW</sub> ≤0.42 for crack-free welding
- Full ultrasonic testing per ASTM A578 Level II
- Custom cutting: Laser (≤40mm) & plasma (≤150mm)
Request our free “Pressure Vessel Material Calculator” or access third-party TÜV SÜD test certificates.
Packaging: VCI-coated + edge guards; 28-ton 40HQ container capacity.
Certificates: EN 10204 3.1 with full traceability to melt heats.
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