Type 302 (UNS S30200)

Description

Type 302 is an austenitic chromium-nickel stainless steel that is available in the annealed and cold worked conditions. Type 302 is a higher carbon, earlier version of Type 304 stainless steel, and many 302 applications have switched to Type 304 with the improvements in melting technology. Type 302 is non-magnetic in the annealed condition but becomes magnetic as a result of cold working.

Type 302 is corrosion resistant in many environments, and the corrosion properties are similar to that of 304/304L stainless steel. The susceptibility to carbide precipitation during welding restricts the use of Type 302 in some applications and 304L is used because of its lower carbon content for welded applications.

Chemical Composition
Chemical Composition (wt%) limits as specified in ASTM A240 and ASME SA240*

Element	302
Carbon	0.15
Chromium	17.0-19.0
Nickel	8.0-10.0
Manganese	2.00
Silicon	0.75
Nitrogen	0.10
Phosphorus	0.045
Sulfur	0.030

* Maximum, unless range is indicated

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Mechanical Properties
Mechanical property requirements for annealed product as specified in ASTM A240 and ASME SA240

Property	302
Yield Strength, min. (ksi)	30
Tensile Strength, min. (ksi)	75
Elongation, min. (%)	40
Hardness, max. (Rb)	92

Mechanical property requirements for cold worked flat rolled products as specified in ASTM A666

Condition	Yield Strength (ksi) min.	Tensile Strength (ksi) min.	Elongation % min. in 2 in.
Condition	Yield Strength (ksi) min.	Tensile Strength (ksi) min.	<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

Physical Properties
Physical properties for Type 302 stainless steel

Property	302
Density, lb/in3	0.29
Modulus of Elasticity, psi	29.0 x 10⁶
Coefficient of Thermal Expansion, 68-212˚F, /˚F	9.2 x 10^-6
Thermal Conductivity, Btu/ft hr ˚F	9.4
Specific Heat, Btu/lb ˚F	0.12
Electrical Resistivity, Microohm-in	27.4

Standards
Typical standards for Type 302 stainless steel

302

ASTM A240

ASTM A666

ASME SA240

AMS 5515 (annealed)

AMS 5516 (annealed)

AMS 5903 (¼ hard)

AMS 5904 (½ hard)

AMS 5905 (¾ hard)

AMS 5906 (full hard)

Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein.

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