347/347H Stainless Steel Sheet

347 stainless steel is stabilized stainless steel plate which offers as its main advantage an excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 to 1500°F (427 to 816°C). Alloy 347 stainless steel plate is stabilized by the addition of columbium and tantalum.

 

347 stainless steel plate is also advantageous for high temperature service because of its good mechanical properties. 347 stainless steel plate offers higher creep and stress rupture properties than Alloy 304 and, particularly, Alloy 304L, which might also be considered for exposures where sensitization and intergranular corrosion are concerns.

 

347 stainless steel is columbium stabilized austenitic stainless steel plate with good general corrosion resistance and somewhat better resistance in strong oxidizing conditions than 321 (UNS S32100). 347 stainless steel has excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 800 - 1500°F (427 - 816°C). 347 stainless steel has good oxidation resistance and creep strength to 1500°F (816°C). It also possesses good low temperature toughness.

 

Alloy 347H (UNS S3409) stainless steel plate is the higher carbon (0.04 - 0.10) version of the alloy. 347H stainless steel was developed for enhanced creep resistance and for higher strength at temperatures above 1000°F (537°C). In most instances, the carbon content of the plate enables dual certification.

 

347 stainless steel plate cannot be hardened by heat treatment, only by cold working. 347 stainless steel can be easily welded and processed by standard shop fabrication practices.