310 / 310S / 310H Stainless Steel Plate – High-Performance Heat-Resistant Alloy

 

Alloy 310 (UNS S31000) is an austenitic stainless steel designed for high-temperature corrosion resistance. Alloy 310S (UNS S31008) is the low-carbon version, enhancing weldability and reducing the risk of carbide precipitation during welding. Alloy 310H (UNS S31009) has a higher carbon content, providing improved creep resistance at elevated temperatures. In most instances the grain size and carbon content of the plate can meet both the 310S and 310H requirements.

 

310S (UNS S31008) is the low carbon version of the alloy. It is utilized for ease of fabrication. 310H (UNS S31009) is a high carbon modification developed for enhanced creep resistance. In most instances the grain size and carbon content of the plate can meet both the 310S and 310H requirements.

Chemical Analysis

Weight % (all values are maximum unless a range is otherwise indicated)

Element	310	310S	310H
Chromium	24.0 min.-26.0 max.	24.0 min.-26.0 max.	24.0 min.-26.0 max.
Nickel	19.0 min.-22.0 max.	19.0 min.-22.0 max.	19.0 min.-22.0 max.
Carbon	0.25	0.08	0.04 min. - 0.10 max.
Manganese	2.00	2.00	2.00
Phosphorus	0.045	0.045	0.045
Sulfer	0.030	0.030	0.030
Silicon	1.50	1.50	0.75
Iron	Balance	Balance	Balance