SA662 Grade C Boiler steel plate

1.What are the chemical composition requirements for SA662 Grade C boiler steel plate?

2.What are the advantages of SA662 Grade C boiler steel plate?

• Excellent Low-Temperature Toughness

SA662 Grade C is suitable for low-temperature environments (typically above -45°C) and offers high impact toughness, effectively preventing brittle fracture in cold conditions. This makes it ideal for cryogenic pressure vessels or applications in cold regions.

• Good Weldability

Due to its low carbon equivalent (CE), this steel has a reduced risk of cold cracking during welding. Common welding methods (such as SMAW, SAW, GTAW) can be used without complex post-weld heat treatment, lowering manufacturing costs.

• High Strength with Balanced Ductility

It provides a tensile strength of ≥585 MPa and a yield strength of ≥450 MPa while maintaining good elongation, meeting the pressure-bearing requirements of high-pressure vessels.

• Strict Quality Control

As an ASME SA662-compliant material, it undergoes rigorous chemical composition analysis, mechanical testing, and non-destructive inspection to ensure high purity and uniformity.

• Corrosion Resistance (Optional Enhancement)

Corrosion resistance can be improved by adding micro-alloying elements (e.g., Nb, V) or normalizing treatment, making it suitable for acidic or humid environments.

3.What is the difference between SA662 Grade C and SA662 Grade B ASTM?

              Key Differences Between SA662 Grade B and Grade C