How Does ASTM A516 Gr 70 Differ from Grade 65 or 60?

When selecting carbon steel plates for pressure vessels and boilers, ASTM A516 Grade 70, Grade 65, and Grade 60 are among the most commonly considered options due to their suitability for moderate and low-temperature services.

At GNEE steel, we specialize in supplying high-quality ASTM A516 Grade 70 steel plate alongside other grades like ASTM A285, ASTM A537, and ASTM A515.

This article provides a detailed comparison of A516 Gr 70 steel plate with Grades 65 and 60, focusing on their chemical composition, mechanical properties, applications, and suitability for pressure vessel steel plate Grade 70 applications, including NACE and HIC compliance.

The ASTM A516 specification, accessible via ASTM A516, covers carbon steel plates for pressure vessels in moderate and low-temperature environments. The grades-60, 65, and 70-differ primarily in strength, with A516-70 carbon steel plate offering the highest strength, followed by Grade 65 and Grade 60.

All three grades can be supplied with NACE MR0175/ISO 15156 and HIC (Hydrogen Induced Cracking) compliance, making them suitable for A516 GR 70 Material specification in sour gas environments. Plates up to 40mm are typically as-rolled, while those over 40mm are normalized.

Each grade aligns with international standards, ensuring versatility:

Key Differences: ASTM A516 GR70 equivalent material, such as P355GH, reflects its higher strength compared to a516 gr 70 equivalent for Grades 65 and 60, which align with lower-strength standards.

All three grades are weldable due to low carbon content, but differences exist:

A516 Gr 60: Best weldability due to lowest carbon content, ideal for complex fabrications in pressure vessel steel plate for oil and gas.

A516 Gr 65: Good weldability, with slightly higher carbon requiring minimal preheating for thicker plates.

A516 Gr 70: Good weldability, but higher carbon and Ceq may require preheating (100-150°C) and post-weld heat treatment for thicker sections, as seen in A516-70 carbon steel plate.

Filler Metals: AWS A5.1 E7018 or AWS A5.5 E7016-1 for SMAW; ER70S-6 for GMAW, applicable to all grades but with stricter controls for A516 Gr 70 plate.

ASTM A516 material finds widespread application in various heavy industries due to its exceptional mechanical properties and adaptability to different environmental conditions. Some of its key applications include:

• Pressure Vessels: ASTM A516 steel is primarily used in the construction of pressure vessels, which store and transport pressurized gases and liquids. These vessels are common in chemical processing plants and power generation facilities.
• Boilers: Boilers in power plants require materials capable of withstanding high-pressure steam at elevated temperatures, making ASTM A516 a natural choice for their construction.
• Storage Tanks: The material's superior toughness and resistance to corrosion make it an ideal choice for storage tanks that house a wide range of substances, such as crude oil, chemicals, and liquefied gases.
• Piping Systems: ASTM A516 is used in the fabrication of pipes and tubing, ensuring the reliable conveyance of fluids and gases within industrial processing plants.

All grades can be supplied with NACE MR0175 and HIC compliance, tested via:

• HIC Testing: Ensures resistance to Hydrogen Induced Cracking in sour gas environments.
• Supplementary Tests: Z15, Z25, Z35, S1-S9, S11, S12, S14, S17, as per ASTM A516.
• Key Difference: A516 Gr 70 impact test results support its use in more severe sour gas environments compared to Grades 65 and 60.

All grades share similar dimensions:

• Thickness: 6mm to 300mm (see A516 GR 70 Plate thickness)
• Width: 1500mm to 4050mm
• Length: 3000mm to 15000mm

Tolerances comply with ASTM A20/A20M, with A516 Gr 70 plate offering precision for high-pressure applications.

Strength: ASTM A516 Grade 70 steel plate > Grade 65 > Grade 60.

Weldability: Grade 60 > Grade 65 > A516-70 carbon steel plate.

Applications: Gr 70 for high-pressure, severe environments; Gr 65 for balanced needs; Gr 60 for moderate conditions.

GNEE steel is a trusted ASTM A516 GR 70 NACE HIC steel plate supplier, offering:

• Quality: Rigorous testing for HIC, NACE, and ASTM compliance.
• Global Delivery: Efficient logistics for ASTM A516 and related standards like ASTM A387, ASTM A514, and EN 10028-3.
• Customization: Tailored A516 GR 70 Plate thickness and sizes.
• Support: Expertise for selecting among ASTM A517, ASTM A203, or JIS G3103.

• ASTM (USA): A515: Gr60, Gr70, A 516: Gr60, Gr65, Gr70, A 517, A 387, A 533, A 537, A 542, A 543, A 302
• IS (INDIA): IS 2002, IS 2041: R/H220, R/H 260, R/H 275, R/H 355
• DIN (GERMANY): 17102: StE 285, St E355, 17155: HI, HII, 19 Mn 6
• BS (ENGLAND): BS 1501-161: Gr360, Gr400, BS 1501-224: Gr400, Gr 490
• EN (EUROPE): EN 10028 : P235L, P265L, P355L, P460L, EN 10028 : 13CrMo4-5, 16Mo3
• JIS (JAPAN): G 3103: SB410, SB450, SB480, G3115: SPV 24, SPV 32, SPV 36 G3125

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ASTM A516 Gr 70 excels in high-pressure, sour gas environments, offering superior strength compared to Grades 65 and 60, which prioritize weldability and ductility. For projects requiring robust performance, choose ASTM A516 Gr 70 plate; for moderate needs, consider Grades 65 or 60, or explore alternatives like ASTM A662, ASTM A225, or ASME SA353.

Contact GNEE steel or visit our product page for quotes and support.

What is the difference between SA516 60 and SA516 70?

ASME SA516 GR 60 has a tensile strength of 415-550 MPa and higher ductility, while SA516 GR 70 offers 485-620 MPa for higher-pressure applications.

What is the difference between SA516 70 and SA515 70?

SA-516-70 typically has higher tensile strength compared to SA515 GR 70. Applications: SA-516-70 is commonly used for pressure vessels where moderate and lower temperature service is required. SA515 GR 70 is used for intermediate and higher temperature service applications.

What is the difference between SA 516 GR 65 and 70?

SA516 GR 65 offers better ductility, while GR 70 provides higher strength.

What type of steel is SA 516-70?

carbon-manganese steels

ASTM A516-70 and ASME SA516-70 steel plate products are made from carbon-manganese steels and produced to pressure vessel quality(PVQ) standards as delineated in ASTM A20/ASME SA20.

What is the tensile strength of SA 516 70N?

SA 516 Gr 70N Mechanical Properties
Tensile Strength: 485-620 MPa (70-90 ksi) ensures durability under pressure. Elongation: ≥27% for ≤25 mm, supporting formability.