SA514 GR.J Pressure Vessel Steel Plate

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.

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Product Introduction

‌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

  1. ‌Elevated Temp Stability‌: 35% higher yield strength than SA516-70 at 400°C
  2. ‌Weldability‌: Preheat ≤100°C with AWS A5.28 ER80S-G filler metal
  3. ‌Fracture Resistance‌: K<sub>IC</sub> of 3,800 MPa√m exceeds ASME Section III requirements
  4. ‌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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