Type 301 (UNS S30100)

Description

Type 301 is an austenitic chromium-nickel stainless steel that is available in the annealed and cold worked conditions. In the annealed condition, Type 301 offers the highest level of stretch formability of any stainless steel and in the heavily cold worked condition offers the highest strength level of any 300 series stainless steel. Type 301 is non-magnetic in the annealed condition but becomes magnetic as a result of cold working.

Type 301 is corrosion resistant in many environments, but the corrosion properties are less than that of 304/304L stainless steel. The susceptibility to carbide precipitation during welding restricts the use of Type 301 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 301
Carbon 0.15
Chromium 16.0-18.0
Nickel 6.0-8.0
Manganese 2.00
Silicon 1.00
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 301
Yield Strength, min. (ksi) 30
Tensile Strength, min. (ksi) 75
Elongation, min. (%) 40
Hardness, max. (Rb) 95

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 25 25
½ Hard 110 150 15 18
¾ Hard 135 175 10 12
Full Hard 140 185 8 9
Physical Properties
Physical properties for Type 301 stainless steel
Property 301
Density, lb/in3 0.285
Modulus of Elasticity, psi 28.0 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 301 stainless steel
301
ASTM A240
ASTM A666
ASME SA240
AMS 5901 (annealed)
AMS 5517 (¼ hard)
AMS 5518 (½ hard)
AMS 5902 (¾ hard)
AMS 5519 (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.