A537 Pressure Vessel Steel Plate

‌Material Overview & Competitive Advantages‌ ASTM A537 defines ‌heat-treated carbon-manganese-silicon steel plates‌ for ‌-60°C cryogenic vessels‌ and ‌API 650 aboveground storage tanks‌, offering tensile strengths from ‌485 MPa (Grade 1) to 690 MPa (Grade 3)‌. These quenched-and-tempered plates exceed ASTM A516's strength limits while maintaining superior notch toughness for LPG/LNG containment systems. ‌Key Benefits‌: ‌Cryogenic Performance‌: 55J impact energy at -60°C (Grade 3, 50mm thickness). ‌Global Equivalents‌: EN 10028-2 S500Q (Grade 2), JIS G3115 SPV490Q (Grade 3). ‌Cost Efficiency‌: 20% lower lifecycle cost vs. nickel-alloy steels.

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Product Introduction

‌ASTM A537 Grade 1/2/3 Pressure Vessel Steel: ASME-Certified Quenched & Tempered Solution for Cryogenic Storage‌


‌Material Overview & Competitive Advantages‌

ASTM A537 defines ‌heat-treated carbon-manganese-silicon steel plates‌ for ‌-60°C cryogenic vessels‌ and ‌API 650 aboveground storage tanks‌, offering tensile strengths from ‌485 MPa (Grade 1) to 690 MPa (Grade 3)‌. These quenched-and-tempered plates exceed ASTM A516’s strength limits while maintaining superior notch toughness for LPG/LNG containment systems.

‌Key Benefits‌:

  • ‌Cryogenic Performance‌: 55J impact energy at -60°C (Grade 3, 50mm thickness).
  • ‌Global Equivalents‌: EN 10028-2 S500Q (Grade 2), JIS G3115 SPV490Q (Grade 3).
  • ‌Cost Efficiency‌: 20% lower lifecycle cost vs. nickel-alloy steels.

‌Technical Specifications‌

‌1. Chemical Composition (ASME SA-537M Standard)‌

Grade C Max Mn Range Si Range CEV* Thickness Capacity
Grade 1 0.24% 0.70–1.35% 0.15–0.50% 0.42 ≤150mm
Grade 2 0.24% 1.00–1.60% 0.15–0.50% 0.47 ≤200mm
Grade 3 0.24% 1.00–1.60% 0.15–0.50% 0.52 ≤250mm
*CEV = C + Mn/6 + (Cr + Mo + V)/5

‌2. Mechanical Properties by Thickness‌

Grade Thickness (mm) Yield (MPa) Tensile (MPa) Elongation (%)
Grade 1 ≤65 345 485–620 22
Grade 2 65–100 380 515–655 20
Grade 3 101–150 275 485–620 18

‌Physical Properties‌:

  • Density: 7.80 g/cm³ (0.282 lb/in³)
  • Thermal Expansion: 12.2 µm/m°C (20–300°C)

‌Production & Fabrication‌

‌1. Heat Treatment Process‌

  • ‌Quenching‌: 880–910°C water cooling (Grade 1-3)
  • ‌Tempering‌: 610–660°C × 1h/25mm (mandatory for thickness >40mm)

‌2. Surface Finishing Options‌

Process Technical Specification Industry Application
Grit Blasting SA 2.5 (50–100µm profile) Chemical reactors
Rubber Lining 3mm EPDM (ASTM D2000) Acid storage tanks

‌Industrial Applications‌

‌1. Energy Storage‌

  • ‌LNG Spherical Tanks‌: Grade 3 plates (thickness 60–120mm).
  • ‌Hydrogen Vessels‌: Grade 2 with 2.1mm corrosion allowance.

‌2. Oil & Gas Infrastructure‌

Component Material Grade Operational Parameters
Offshore Separators Grade 1 -40°C @ 15MPa
Refinery Spheres Grade 2 50°C @ 8MPa

‌3. Chemical Processing‌

  • ‌Ammonia Storage Tanks‌: Grade 3 (PWHT + 100% RT inspection).
  • ‌Ethylene Transport Vessels‌: Grade 2 (NACE MR0175 compliant).

‌Quality Assurance‌

  1. ‌Testing Protocols‌:
    • Ultrasonic testing: SA-578 Level III for thickness >75mm.
    • Charpy V-notch testing at -60°C (ASTM A370).
  2. ‌Certifications‌:
    • ASME U Stamp + PED 2014/68/EU.
    • NORSOK M-650 Material Compliance.

‌Delivery & Storage‌

  • ‌Dimensions‌:
    • Width: 1,800–3,500mm (max length: 18m).
    • Thickness tolerance: ±0.2mm (ground edges), ±0.75% (as-rolled).
  • ‌Packaging‌: VCI-coated + desiccant (24-month shelf life).

‌Welding Advisory‌: Use AWS A5.5 E11018-G electrodes with 100–150°C preheat for Grade 3*


‌Technical Footnotes‌:

  1. Grade 3 maintains 18% elongation in 150mm thick sections.
  2. Maximum design stress: 160 MPa @ 50°C (ASME II-D Table 5).

‌Why Choose ASTM A537?‌
Compared to A516 carbon steel, A537 provides 40% higher yield strength at -30°C while maintaining equivalent weldability. Its optimized Mn/Si ratio enables 15% better HIC resistance in sour service environments.


‌Environmental Note‌: 100% recyclable material with 85% recycled content in production.

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