Differences between ASTM A312 GR TP347 and ASTM A312 GR TP347H
ASTM A312 GR TP347 and ASTM A312 GR TP347H are stainless steel grades commonly used in high-temperature and corrosive environments. While they share similar properties, the main difference lies in their carbon content and performance under specific conditions.

ASTM A312 GR TP347 SMLS Pipes
ASTM A312 GR TP347
TP347 contains a lower carbon content, typically up to 0.08%. This makes it highly resistant to intergranular corrosion, especially after welding, making it ideal for applications like chemical processing and food industries. Its weldability and resistance to carbide precipitation are key advantages for environments where welding is required.

ASTM A312 GR TP347H SMLS Pipes
ASTM A312 GR TP347 SMLS Pipe
TP347H, with its higher carbon content up to 0.1%, is specifically designed for high-temperature applications. The increased carbon level enhances its mechanical strength and creep resistance under prolonged exposure to extreme heat, making it suitable for boilers, heat exchangers, and power generation systems.
The choice between TP347 and TP347H depends on application needs. TP347 is preferred for moderate temperatures and corrosion resistance after welding, while TP347H excels in high-temperature, high-stress environments.
At Haihao Group, we produce both TP347 and TP347H pipes with advanced manufacturing processes and strict quality controls, ensuring they meet the highest industry standards for various demanding applications.