Type 301 (UNS S30100) Stainless Steel

Type 301 (UNS S30100) Stainless Steel

Type 301 (UNS S30100) Stainless Steel 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...
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Type 301 (UNS S30100) Stainless Steel

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)


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