Carbon steel plate ASTM A516 Grade 70 data sheet

Carbon Steel Plate ASTM A516 Grade 70 Data Sheet

The ASTM A516 Grade 70 carbon steel plate is a widely used material in the fabrication of pressure vessels and boilers, known for its excellent strength, toughness, and weldability in moderate and low-temperature environments.

At Gangsteel, we supply high-quality A516 Gr 70 steel plate that meets stringent standards, including NACE MR0175 and HIC compliance for demanding applications in oil, gas, and petrochemical industries. This data sheet provides a comprehensive overview of the material's specifications, chemical composition, mechanical properties, equivalent grades, and more,for keywords like pressure vessel steel plate Grade 70 and boiler quality steel plate for oil and gas.

1. Material Specification

ASTM A516 Grade 70 is specified under the ASTM A516/A516M standard for carbon steel plates intended for welded pressure vessels where improved notch toughness is important.

It is suitable for moderate and lower-temperature services, with plates up to 40mm typically supplied in the as-rolled condition, while thicker plates are normalized to enhance toughness.

The material is often used in sour service and wet H2S applications when HIC testing is required. Standard dimensions include thicknesses from 6mm to 300mm, widths from 1500mm to 4050mm, and lengths from 3000mm to 15000mm, aligning with standards like ASTM A516.

2. Chemical Composition

The chemical composition of A516 Gr 70 chemical composition is controlled to ensure optimal performance:

Note: Carbon content may vary by thickness: ≤0.27% for <12.5mm, up to ≤0.31% for >200mm. The low phosphorus and sulfur levels improve weldability and resistance to hydrogen-induced cracking, making it ideal for ASTM A516 Gr 70 plate in corrosive environments.

3. Mechanical Properties

The mechanical properties of ASTM A516 Grade 70 ensure reliability in high-pressure applications:

Impact testing (a516 gr 70 impact test) shows minimum energy of 20J at temperatures as low as -46°C for ≤25mm thickness. These properties make the ASTM A516 Grade 70 steel plate suitable for demanding conditions, with hardness not typically specified but ensuring good performance.

4. Equivalent Grades

ASTM A516 Grade 70 aligns with several international standards for global compatibility:

These equivalents, such as those in EN 10028-2, ensure the ASTM A516 GR70 equivalent material can be used interchangeably in projects requiring similar properties.

5. Tolerances and Dimensions

Dimensional tolerances comply with ASTM A20/A20M:

• Thickness: Varies by range (e.g., ±0.3mm for 6-10mm).
• Width: ±20mm.
• Length: ±25mm.
• Flatness: As per standard for pressure vessel plates.

The A516 GR 70 Plate thickness ranges from 6mm to 300mm, offering flexibility for applications like those in ASTM A537 or ASTM A285.

6. Delivery Conditions and Heat Treatment

• As-Rolled: For plates ≤40mm.
• Normalized (+N): Required for >40mm or when notch toughness is specified.
• Stress Relieved: Optional for reducing stresses.

These conditions align with A516 GR 70 Material specification, ensuring compatibility with standards like ASTM A515.

7. Weldability

ASTM A516 Grade 70 offers excellent weldability due to its low carbon content. Compatible with methods like SMAW, GTAW, and GMAW, using fillers such as AWS A5.1 E7018. Preheating (100-150°C) may be needed for thicker sections to prevent cracking, especially in pressure vessel steel plate for sour gas environments.

8. Supplementary Requirements

• HIC Testing: For resistance to Hydrogen Induced Cracking in sour gas.
• NACE MR0175/ISO 15156: For H2S-rich environments.
• Other Tests: Z15/Z25/Z35 (through-thickness), ultrasonic, impact, and more per ASTM A20.
• Certification: Mill Test Certificate (MTC) per EN 10204 3.1/3.2.

These make Gangsteel a reliable ASTM A516 GR 70 NACE HIC steel plate supplier.

9. Applications

• Pressure Vessels: High-pressure vessels in oil, gas, and petrochemical sectors.
• Boilers: Steam drums and components.
• Storage Tanks: For chemicals and gases.
• Offshore Platforms: Corrosive marine structures, similar to ASTM A203.

10. Key Takeaways

ASTM A516 Grade 70 is a robust carbon steel plate for pressure vessels, offering high strength, excellent toughness, and compliance with global standards like JIS G3115 and EN 10028-6. Its versatility and reliability make it essential for industries requiring durable materials. Gangsteel provides customized A516 Gr 70 plate with full testing and global delivery. For more details, visit our product page or contact us.