Ferrous Alloys

Type 347 Austenitic Stainless Steel

Application & Characteristics 
Stabilized with columbium. Used for weldments in vibrating or corrosive services in the 800 to 1500F range.
Chemical Composition (%)
Same as for Type 321 except no titanium; instead Cb & Ta at 10 times minimum carbon.
Physical Properties
Melting Range (°F)2550 – 2600
Density (lbs/in³) 68F0.286
Thermal Expansion (in/in °Fx10 to the power of -6)9.2 (0 – 600F)
Electrical Resistivity (ohms/cir mil/ft.) 68F440
Mechanical Properties – Temper = A
Tensile Strength (psi x 10³)85
Yield Strength (psi x 10³)40
Elongation ( % )50
Mechanical Properties – Temper = H/2
Tensile Strength (psi x 10³)125
Yield Strength (psi x 10³)95
Elongation ( % )25
Mechanical Properties – Temper = H
Tensile Strength (psi x 10³)165
Yield Strength (psi x 10³)135
Elongation ( % )8

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