These types of stainless steel are austenitic chromium steels containing colubium. They are recommended for parts fabricated by welding which cannot be subsequently annealed. These types also are used for parts which are intermittently heated and cooled to temperatures between 800°F and 1600°F. The addition of columbium produces a stabilied type of stainless that eliminates carbide precipitation and, consequently, intergranular corrosion.
Seamless Stainless Steel Pipes 1/2" - 8"
Stainless Steel Tubes 1/2" - 8"
Weld Stainless Steel Pipes 1/2" - 12"
Stainless Steel Pipe Fittings 1/2" - 12"
Stainless Steel Flanges 1/2" - 12"
Chemical Composition - 347/347H
|0.08%||Trace*||17% - 20%||2.0%||9% - 13%||0.04%||0.03%||0.75%||Trace*|
*The columbium plus tantalum content shall not be less than 10 times the carbon content and not more than 1.0%. 347H Stainless Steel requires the columbium plus tantalum content to be not less than 8 times the carbon content and not more than 1.0%.
Airplane exhaust manifolds
Stainless Steel Pipe Fittings
Stainless Steel Pipes
Stainless Steel Flanges (i.e. flanges, slip-ons, blinds, weld-necks, lapjoints, long welding necks, socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples)
Tensile Strength (KSI): 75
Yield Strength (KSI): 30
KSI can be converted to MPA (Megapascals) by multiplying by 6.895.
Source: Yaang Pipe Industry Co., Limited (www.yaang.com)