Equivalent standards for ASTM A516 Grade 70

ASTM A516 Grade 70 is a carbon steel plate used for pressure vessels and boilers in medium to low-temperature service. Its equivalent standards vary across different countries and regions.

I. The main equivalent standards

1.1 EN 10028-2:2017 P355GH

Standard: European Standard "Flat products made of steels for pressure purposes - Part 2: Non-alloy and alloy steels with specified elevated temperature properties."

Performance Match: Tensile strength 460-640 MPa, Yield strength ≥235 MPa (for thickness ≤16 mm). The strength range is close to that of ASTM A516 Grade 70 (Tensile strength 485-620 MPa, Yield strength ≥260 MPa).

Applicable Scenarios: High-temperature environments (-20°C to 500°C), commonly used in power station boilers and chemical pressure vessels.

Delivery Condition: Normalized treatment to ensure microstructural uniformity and toughness.

1.2 GB/T 713.2-2023 Q345R

Standard: Chinese National Standard "Steel plates, sheets and strips for pressure equipment - Part 2: Non-alloy and alloy steels with specified elevated temperature properties."

Performance Match: Tensile strength 510-640 MPa, Yield strength ≥345 MPa (for thickness ≤16 mm), Impact energy ≥34 J (at -20°C).

Comparison: Strength is slightly higher than ASTM A516 Grade 70, but the impact test temperature (-20°C) differs from ASTM's -46°C. Selection should be based on specific service conditions.

Application: Pressure vessels in petrochemical, nuclear power, and other fields.

Delivery Condition: Hot-rolled or normalized.

1.3 JIS G3115 SPV355

Standard: Japanese Industrial Standard "Steel Plates for Pressure Vessels for Intermediate and Moderate Temperature Service."

Performance Match: Tensile strength 520-640 MPa, Yield strength ≥355 MPa, Impact energy ≥47 J (at 0°C).

Difference: The impact test temperature (0°C) is higher than that of ASTM A516 Grade 70 (-46°C), making it suitable for moderate temperature environments.

Application: Petroleum storage tanks, reactors, etc.

Delivery Condition: Hot-rolled or normalized.

II. Key Differences and Selection Recommendations

Strength and Impact Properties

ASTM A516 Grade 70: Emphasizes low-temperature toughness (Impact energy ≥54 J at -46°C), suitable for extreme low-temperature environments like LNG storage tanks.

P355GH, Q345R: Offer better high-temperature performance, but their impact test temperatures are higher. Specific needs may require additional requirements (such as agreed impact energy levels).

Delivery Condition

ASTM A516 Grade 70 typically requires normalized treatment, while Q345R and SPV355 can be supplied hot-rolled or normalized, depending on thickness and performance requirements.

Welding and Fabrication

All equivalent steel grades require control of the Carbon Equivalent Value (CEV) to ensure weldability. For example, the CEV of Q345R is ≤0.43%, making it compatible with the welding processes used for ASTM A516 Grade 70.

Certification and Compliance

Export products must comply with the standards of the target market (e.g., EU CE marking, ASME stamp). Some standards (like EN 10028-2) require providing an EN 10204 3.1/3.2 inspection certificate.

III. Summary

IV. Selection Recommendation:

Based on specific service conditions (temperature, pressure, medium) and certification requirements, prioritize the standard whose performance parameters are closest to ASTM A516 Grade 70. If low-temperature toughness is required, pay special attention to the impact test temperature and energy value, and ensure material suitability through agreement or additional testing. For high-temperature applications, European and Chinese standards offer advantages, but welding procedures and long-term performance must be validated.