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Description

Type 201 is an austenitic chromium-nickel-manganese stainless steel that was developed in the 1950’s due to worldwide nickel shortages. In the Type 201 composition, manganese and nitrogen are partially substituted for nickel. T201 addresses the volatility of nickel prices while offering comparable corrosion resistance and formability to T301 and T304 and has become a viable lower cost alternative to these austenitic grades. Type 201 can be used in many applications because of its wide range of mechanical properties in the annealed and cold worked condition. Type 201 is non-magnetic in the annealed condition but becomes magnetic as a result of cold working.


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

Element201
Carbon0.15
Chromium16.0-18.0
Nickel3.5-5.5
Manganese5.50-7.50
Silicon1.00
Nitrogen0.25
Phosphorus0.060
Sulfur0.030
* Maximum, unless range is indicated

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

Property201
Yield Strength, min. (ksi)45
Tensile Strength, min. (ksi)95
Elongation, min. (%)40
Hardness, max. (Rb)100

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

ConditionYield Strength
(ksi) min.
Tensile Strength
(ksi) min.
Elongation % min. in 2 in.
<0.015 in.≥0.015 in.
¼ Hard751252525
½ Hard1101501518
¾ Hard1351751012
Full Hard14018589

Physical Properties
Physical properties for Type 201 stainless steel


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Property201
Density, lb/in30.283
Modulus of Elasticity, psi28.6 x 106
Coefficient of Thermal Expansion, 68-212˚F, /˚F9.2 x 10-6
Thermal Conductivity, Btu/ft hr ˚F9.4
Specific Heat, Btu/lb ˚F0.12
Electrical Resistivity, Microohm-in27.0

Standards
Typical standards for Type 201 stainless steel

201
ASTM A240
ASTM A666
ASME SA240

Product Packaging

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