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ATI Allegheny Ludlum Stainless Steel Type 201, 10% Cold Work (UNS S20100)
Categories: Metal; Ferrous Metal; Stainless Steel; T S20000 Series Stainless Steel

Material Notes: Allegheny Ludlum Type 201 and 201L have the greatest tonnage of the Cr-Ni-Mn steels (200 series). Type 201 provides advantages over the 18-8 grades in certain applications. Lower cost manganese and nitrogen additions are partial substitutes for nickel making them more economical alloys. Because they possess a very desirable combination of economy plus good mechanical properties and corrosion resistance properties, they have been used in a wide variety of consumer and transportation applications.

This austenitic structure achieves significant strengthening through cold working of the material to produce the transformation to a stronger martensitic structure. Type 201 is resistant to a wide variety of mild to moderately corrosive media.

Typical applications for Types 201 and 201L are cookware bodies/lids, hose clamps, piston rings, transit car structural member, transit car roofing/siding, thermal window spacers, air bag containers, and truck trailer posts and door frames.

Information provided by Allegheny Ludlum Corporation.

Vendors: Visit metalmen for your metals needs. Products include special chemistry, tight tolerances, custom tempers, odd dimensions/forms, and small quantities. Phone 1-800-767-9494.

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Physical PropertiesOriginal ValueComments
Density 7.86 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Rockwell C 28.5
@Temperature 23.0 °C
 28.5
@Temperature 23.0 °C
Tensile Strength, Ultimate 856 MPa
@Temperature 23.0 °C
 902 MPa
@Temperature 23.0 °C
Tensile Strength, Yield 645 MPa
@Temperature 23.0 °C
 678 MPa
@Temperature 23.0 °C
Elongation at Break 31.3 %
@Temperature 23.0 °C
 32 %
@Temperature 23.0 °C
Modulus of Elasticity 210 GPa
Compressive Yield Strength 441 MPa
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.0000670 ohm-cm
Magnetic Permeability 1.048D.C. Permeability (m at 200 H)
 
Thermal PropertiesOriginal ValueComments
CTE, linear 16.6 µm/m-°C
@Temperature 20.0 - 100 °C
 18.0 µm/m-°C
@Temperature 20.0 - 316 °C
 18.0 µm/m-°C
@Temperature 20.0 - 358 °C
 20.3 µm/m-°C
@Temperature 20.0 - 871 °C
Specific Heat Capacity 0.502 J/g-°C
@Temperature 0.000 - 100 °C
Thermal Conductivity 16.3 W/m-K
@Temperature 100 °C
 23.0 W/m-K
@Temperature 500 °C
Melting Point 1400 - 1455 °C
Solidus 1400 °C
Liquidus 1455 °C
 
Component Elements PropertiesOriginal ValueComments
Carbon, C <= 0.15 %
Chromium, Cr 16 - 18 %
Iron, Fe 72 %as balance
Manganese, Mn 5.5 - 7.5 %
Nickel, Ni 3.5 - 5.5 %
Nitrogen, N <= 0.25 %
Silicon, Si <= 1.0 %

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NL2012 / 17810

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