302 Austenitic Stainless Steels

Corrosion Cracking – 302 is the most susceptible of the austenitic stainless steels to stress corrosion cracking in halides because of its relatively low nickel content. Stresses may result from cold deformation of the alloy during forming, or by roller expanding tubes into tube sheets, or by welding operations which produce stresses from the thermal cycles used.

MECHANICAL PROPERTIES

Alloy	Temper	Tensile Strength Minimum (psi)	Yield Strength Minimum 0.2% offset (psi)	% Elongation in 2" Minimum	Notes
302	Annealed	75,000	30,000	40 %	-
302	1/4 Hard	125,000	75,000	10 %	-
302	1/2 Hard	150,000	110,000	9 %	-
302	Full Hard	185,000	140,000	3 %	-

Condition	Yield Strength (ksi) min.	Tensile Strength (ksi) min.	Elongation % min. in 2 in.
<0.015 in.	≥0.015 in.
¼ Hard	75	125	10	12
½ Hard	110	150	9	10
¾ Hard	135	175	5	6
Full Hard	140	185	3	4

Stress levels may be reduced by annealing or stress relieving heat treatments following deformation, thereby reducing sensitivity to halide stress corrosion cracking.

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