ASTM A516 Gr 70 Normalized Steel Plate Specs

What is ASTM A516 Gr 70 Normalized Steel Plate Specs?

As a leading manufacturer and exporter of pressure vessel and boiler steel plates, Gangsteel provides top-quality ASTM A516 GR 70 normalized steel plates designed for superior performance in high-pressure and low-temperature environments.

This specification sheet details the chemical composition, mechanical properties, and applications of ASTM A516 GR 70 in its normalized condition, offering critical insights for engineers, fabricators, and procurement specialists in industries such as oil and gas, petrochemical, and power generation.

Chemical Composition

The chemical composition of ASTM A516 GR 70 is precisely controlled to ensure excellent weldability, toughness, and resistance to brittle fracture. Normalization refines the grain structure, enhancing mechanical properties. The table below outlines the chemical composition as per ASTM standards:

Key Notes:

• Carbon: Capped at 0.27% to balance strength and weldability, preventing excessive hardness.
• Manganese: The 0.85–1.20% range enhances strength and toughness, critical for pressure vessels.
• Phosphorus and Sulfur: Low levels (0.035% max) minimize brittleness, improving notch toughness.
• Silicon and Aluminum: Ensure the steel is fully killed, reducing gas inclusions and supporting uniform properties.

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

Mechanical Properties

Normalization of ASTM A516 GR 70 enhances its toughness and resistance to thermal stress, making it ideal for pressure vessels and boilers. The table below summarizes its mechanical properties:

Highlights:

• Tensile Strength: 485–620 MPa ensures durability in high-pressure applications.
• Yield Strength: Minimum 260 MPa supports structural integrity.
• Elongation: 17–21% ductility enables forming and fabrication without cracking.
• Impact Toughness: Excellent performance at low temperatures (down to -46°C), suitable for cryogenic environments.

Compared to ASTM A516 GR 65 (450–585 MPa) and ASTM A516 GR 60 (415–550 MPa), normalized ASTM A516 GR 70 offers higher strength, making it ideal for robust applications.

Physical Properties

These properties ensure ASTM A516 GR 70 maintains stability in high-temperature and high-pressure conditions, critical for boiler applications.

Applications

Normalized ASTM A516 GR 70 is widely used in:

• Pressure Vessels: For oil, gas, and chemical processing, due to its high strength and low-temperature toughness.
• Boilers: In power generation, where thermal stability and weldability are essential.
• Cryogenic Equipment: Suitable for LNG storage and other low-temperature applications.
• Fabrication: Its formability supports complex assemblies in industrial equipment.

Gangsteel’s ASME SA516 GR 70 plates meet ASME standards, ensuring reliability for global boiler and pressure vessel applications.

Comparison with Other Grades

The following table compares normalized ASTM A516 GR 70 with related grades:

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

Weldability and Processing

Normalized ASTM A516 GR 70 is fully killed carbon steel, offering excellent weldability with processes like SMAW, GTAW, and SAW. The normalized microstructure reduces residual stresses, enhancing toughness and weld quality. Gangsteel provides plates in normalized or hot-rolled conditions to meet specific fabrication needs.

Gangsteel Solution

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

• Certified Quality: Plates undergo ultrasonic testing, Charpy impact tests, and chemical analysis to meet ASTM/ASME standards.
• Customization: Available in various thicknesses and normalized conditions for specific project requirements.
• Global Supply: Competitive pricing and reliable delivery for industries worldwide.
• Technical Expertise: Support for selecting ASTM A516 GR 70 versus ASTM A516 GR 65, ASTM A516 GR 60, or ASTM A516 GR 55.

Gangsteel’s normalized ASTM A516 GR 70 plates deliver exceptional strength, toughness, and weldability, ensuring optimal performance in pressure vessel and boiler applications. For more on equivalent standards, explore our ASME SA516 GR 70 Equivalent Grade guide.