ASTM A516 Gr 70 Steel for Low Temperature Applications

Gangsteel, a leading manufacturer and exporter of pressure vessel and boiler steel plates, supplies premium ASTM A516 GR 70 steel plates engineered for exceptional performance in low-temperature applications. Widely used in industries such as oil and gas, petrochemical, and cryogenic storage, ASTM A516 GR 70 is renowned for its high strength, toughness, and weldability, making it ideal for pressure vessels and boilers operating in cold environments. This article details its chemical composition, mechanical properties, and suitability for low-temperature service, providing critical insights for engineers and fabricators.

Chemical Composition

The chemical composition of ASTM A516 GR 70 is carefully controlled to ensure excellent weldability and toughness, particularly in low-temperature conditions. The table below outlines its composition per ASTM standards:

Key Notes:

• Carbon: Capped at 0.27% to ensure weldability and prevent excessive hardness, critical for low-temperature applications.
• Manganese: The 0.85–1.20% range enhances strength and toughness, vital for resisting brittle fracture in cold environments.
• Phosphorus and Sulfur: Low levels (0.035% max) improve notch toughness, ensuring performance at low temperatures.
• Aluminum: Ensures the steel is fully killed, reducing gas inclusions and enhancing uniformity for cryogenic service.

Gangsteel’s ASTM A516 GR 70 plates comply with ASME SA516 GR 70 standards, with rigorous testing to verify chemical consistency.

Mechanical Properties

ASTM A516 GR 70 is typically supplied in a normalized condition, which refines its grain structure to enhance toughness for low-temperature applications. The table below summarizes its mechanical properties:

Highlights:

• Tensile Strength: The 485–620 MPa range ensures durability in high-pressure, low-temperature environments.
• Yield Strength: A minimum of 260 MPa supports structural integrity under stress.
• Elongation: 17–21% ductility allows for fabrication without compromising toughness.
• Impact Toughness: Excellent performance at -46°C makes ASTM A516 GR 70 ideal for cryogenic applications, such as LNG storage.

Compared to ASTM A516 GR 65 (450–585 MPa) and ASTM A516 GR 60 (415–550 MPa), ASTM A516 GR 70 offers superior strength, while its impact toughness matches or exceeds that of ASTM A516 GR 60 at low temperatures.

Low-Temperature Applications

ASTM A516 GR 70 is specifically designed for low-temperature applications in the oil and gas industry, including:

• LNG Storage Tanks: Its excellent impact toughness at -46°C ensures reliability in cryogenic storage for liquefied natural gas.
• Pressure Vessels: Used in oil and gas processing for vessels operating in cold climates or handling low-temperature fluids.
• Boilers: Employed in power generation and refining processes where thermal stability and low-temperature performance are critical.
• Pipelines and Fittings: Suitable for components exposed to subzero temperatures in gas processing facilities.

Gangsteel’s ASME SA516 GR 70 plates meet ASME standards, ensuring compliance for low-temperature pressure vessel and boiler applications worldwide.

Weldability

ASTM A516 GR 70 is fully killed carbon steel, offering excellent weldability with standard processes like SMAW, GTAW, and SAW. Its low carbon content minimizes weld imperfections, while normalization enhances grain structure for improved toughness in low-temperature conditions. Gangsteel supplies plates in normalized or hot-rolled conditions to meet fabrication requirements for cryogenic applications.

Comparison with Other A516 Grades

The table below compares ASTM A516 GR 70 with other A516 grades for low-temperature applications:

For global equivalents, such as EN P355GH, refer to Gangsteel’s ASME SA516 GR 70 Equivalent Grade guide.

Why Choose Gangsteel?

Gangsteel is a global leader in supplying ASTM A516 GR 70 and ASME SA516 GR 70 plates, offering:

• Certified Quality: Plates undergo ultrasonic testing, Charpy impact tests at -46°C, and chemical analysis to meet ASTM/ASME standards.
• Customization: Available in normalized or hot-rolled conditions for low-temperature applications.
• Global Supply: Competitive pricing and reliable delivery for industries worldwide.
• Technical Support: Expert guidance on selecting ASTM A516 GR 70 versus ASTM A516 GR 65, ASTM A516 GR 60, or ASTM A516 GR 55.

Gangsteel Solution

ASTM A516 GR 70 is a high-performance steel plate optimized for low-temperature applications, offering superior strength, toughness, and weldability for LNG storage, pressure vessels, and boilers. Gangsteel’s ASME SA516 GR 70 plates ensure reliability in demanding cryogenic environments. For more on equivalent standards, explore our ASME SA516 GR 70 Equivalent Grade guide.

Long-Tail Keywords

ASTM A516 GR 70 low temperature steel, A516 Gr 70 cryogenic applications, ASME SA516 GR 70 for LNG storage, A516 Gr 70 pressure vessel plate