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
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.
<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.  © 2014 RMP Inc.. All rights reserved.