310 Stainless Steel Sheet/Plate:
310 stainless steel sheet is an austenitic stainless steel developed for use in high temperature corrosion resistant applications. The alloy resists oxidation up to 2010℉ under mildly cyclic conditions.Because of its high chromium and moderate nickel content, Alloy 310 is resistant to sulfidation and can also be used in moderately carburizing atmospheres.
Grade 310 (UNS S31000) and its various subgrades combine excellent high temperature properties with good ductility and weldability.
310S Stainless Steel Sheet/Plate:
310S stainless steel sheet is the low carbon version of the alloy. It is utilized for ease of fabrication.
Grade 310S (UNS S31008) is used when the application environment involves moist corrodents in a temperature range lower than that which is normally considered "high temperature" service. The lower carbon content of 310S does reduce its high temperature strength compared to 310H.
310H Stainless Steel Sheet/Plate:
310H 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
Grade 310H (UNS 531009) has a carbon content restricted to exclude the lower end of the 310 range, so is the grade of choice for high temperature applications.