Type 348 Austenitic Stainless Steel


Application & Characteristics
Preferred over Type 347 for nuclear components.

Chemical Composition (%)
Same as Type 347 except Ta 0.10 max.

Physical Properties
Melting Range (°F)	2550 – 2600
Density (lbs/in³) 68F	0.286
Thermal Expansion (in/in °Fx10 to the power of -6)	9.4 (0 – 600F)
Electrical Resistivity (ohms/cir mil/ft.) 68F	440

Mechanical Properties – Temper = A
Tensile Strength (psi x 10³)	85
Yield Strength (psi x 10³)	40
Elongation ( % )	50
Hardness	B85(Rockwell)

Mechanical Properties – Temper = H/2
Tensile Strength (psi x 10³)	125
Yield Strength (psi x 10³)	95
Elongation ( % )	25
Hardness	C20(Rockwell)

Mechanical Properties – Temper = H
Tensile Strength (psi x 10³)	165
Yield Strength (psi x 10³)	135
Elongation ( % )	8
Hardness	C30(Rockwell)