ASTM Standard Pressure Vessel Steel Plate A709 Gr.100W

A709 Gr. 100W Performance Parameters:
① Yield strength ≥ 355 MPa (A709 Gr. 100W standard value);
② Low-temperature impact energy (-40°C, V-notch ≥ 27 J);
③ Carbon equivalent ≤ 0.45% (reduces the risk of cold cracking during welding).
 
Three Key Factors in Selecting Steel for Pressure Vessels
1. Verification of certification documents: Confirm that the steel plate complies with ASME BPVC code requirements and that key parameters match the design drawings.
2. Mechanical property testing: Focus on Charpy V-notch impact energy at -20°C (≥47 J); additional testing is required for low-temperature applications.
3. Welding suitability: Verify the ductility of the weld zone through bend tests to prevent cracking caused by welding.
 
A709 Gr.100W steel plate is commonly used in applications such as LNG storage tanks, cryogenic pressure vessels, and wind turbine towers. Key considerations for use include:
• Avoid direct contact with carbon steel to prevent corrosion.
• Preheating (100–150°C) is required prior to welding.
• Store in a dry, well-ventilated environment to prevent surface rusting.