Type 302 (UNS S30200) Stainless Steel

Type 302 (UNS S30200) Stainless Steel

Type 302 (UNS S30200) Stainless Steel 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...
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Type 302 (UNS S30200) Stainless Steel

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


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


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


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