What is the Difference Between ASME SA 516 and ASTM A516?

ASME SA 516 and ASTM A516 are essentially the same carbon steel plate specifications for pressure vessels, with SA 516 certified for ASME Boiler and Pressure Vessel Code (BPVC) applications and A516 for ASTM standards.At Gangsteel, we supply dual-certified plates like ASME SA 516 GR 70 and ASTM A 516 GR 70 to meet global requirements. This article explores their similarities, minor differences, and applications in detail.

Overview of ASME SA 516 and ASTM A516

ASME SA 516 and ASTM A516 are specifications for carbon steel plates used in welded pressure vessels operating at moderate and low temperatures. Both standards cover grades such as 55, 60, 65, and 70, with identical chemical compositions and mechanical properties. The key difference lies in their certification:

• ASTM A516: Developed by the American Society for Testing and Materials (ASTM), it focuses on material properties and testing methods, applicable to a wide range of pressure vessel applications.
• ASME SA 516: Adopted by the American Society of Mechanical Engineers (ASME) for its Boiler and Pressure Vessel Code (BPVC), it includes additional requirements for certification under ASME standards, such as traceability and documentation for pressure vessel safety.

Gangsteel produces dual-certified plates, such as ASME SA 516 GR 65 and ASTM A 516 GR 65, ensuring compliance with both standards for flexibility in global markets.

Chemical Composition

The chemical composition for SA 516 and A516 is identical across grades, as SA 516 adopts A516’s specifications. Below is the composition for Grade 70:

Gangsteel’s plates, such as ASME SA 516 GR 60, are tested for HIC resistance per NACE TM0284, with sulfur content as low as 0.003% for sour service applications, ensuring compliance with both ASME and ASTM standards.

Mechanical Properties Comparison

The mechanical properties are identical for SA 516 and A516, as SA 516 adopts A516’s requirements:

These properties are verified through ASTM E8 (tension testing) and ASTM E23 (impact testing). Gangsteel’s dual-certified plates, including ASTM A 516 GR 55, meet both standards, ensuring versatility.

Key Differences: Certification and Application

While the material properties are identical, the differences lie in certification and application context:

• Certification:
  • ASTM A516: Focuses on material testing and properties, suitable for general pressure vessel applications. It is widely used in industries where ASME certification is not mandatory.
  • ASME SA 516: Requires additional documentation, traceability, and compliance with ASME BPVC (Section II, Part A), ensuring suitability for pressure vessels under ASME-regulated jurisdictions. This includes Mill Test Certificates (MTCs) per EN 10204 3.1 and third-party inspections.
• Application Context:
  • A516: Used in projects where ASTM standards suffice, such as non-ASME jurisdictions or less regulated industries.
  • SA 516: Mandatory for ASME-coded pressure vessels, ensuring compliance with safety standards in industries like oil and gas.

Gangsteel’s dual-certified plates eliminate the need to choose, as they meet both ASTM and ASME requirements, offering flexibility for global clients.

Applications of SA 516 and A516

Both specifications are used in:

• Oil and Gas: Pressure vessels and pipelines, with ASME SA 516 GR 70 preferred for high-pressure and sour service applications.
• Petrochemical: Reactors and heat exchangers requiring robust weldability.
• Power Generation: Boilers and steam drums operating at moderate temperatures, often using ASME SA 516 GR 60.

Gangsteel supplies plates in thicknesses from 6mm to 200mm (custom up to 300mm), with widths up to 4,500mm and lengths up to 12,000mm, tailored to project specifications. Our plates are normalized or stress-relieved to enhance toughness and weldability.

Gangsteel’s Commitment to Quality

Gangsteel ensures that our SA 516 and A516 plates meet both ASME and ASTM standards through:

• Rigorous Testing: Ultrasonic testing (ASTM A435), HIC testing (NACE TM0284), and Charpy V-notch impact tests at -46°C.
• Certifications: MTCs per EN 10204 3.1, verified by SGS and BV.
• Global Supply: Export to over 50 countries with 3-7 day delivery to Asia.
• Customization: Tailored sizes and heat treatments to meet specific project requirements.

Our zero-defect record underscores our commitment to delivering reliable, high-quality plates for pressure vessel applications.

Why Choose Dual-Certified Plates?

Dual-certified SA 516/A516 plates offer:

• Flexibility: Suitable for both ASME and ASTM projects, reducing inventory complexity.
• Global Compliance: Accepted in international markets, from North America to Asia.
• Enhanced Safety: Fine-grain structure and low sulfur content ensure superior performance in critical applications.
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Conclusion

1. ASME SA 516 and ASTM A516 are identical carbon steel plate specifications, with SA 516 certified for ASME BPVC applications. Gangsteel’s dual-certified plates, including ASME SA 516 GR 70 and ASTM A 516 GR 70, provide versatile, high-quality solutions for pressure vessels worldwide. Contact Gangsteel for tailored plates that meet both ASME and ASTM standards, backed by rigorous testing and competitive pricing.

Keywords: ASME SA 516 vs ASTM A516, carbon steel plates, pressure vessel standards, Gangsteel dual-certified plates