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AK Steel 444 Ferritic Stainless steel
Categories: Metal; Ferrous Metal; Ferritic; Stainless Steel; T 400 Series Stainless Steel

Material Notes: AK Steel 444 is a low-carbon, low nitrogen, ferritic stainless steel that provides pitting and crevice corrosion resistance superior to most ferritic stainless steels. Applications requiring superior corrosion resistance and resistance to chloride stress corrosion cracking are ideal for this alloy. Current uses include food processing, brewery and wine-making equipment; hot-water tanks and heat exchanger tubing and automotive components.

Information provided by AK Steel

Key Words: UNS S44400
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Physical PropertiesOriginal ValueComments
Density 7.75 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Rockwell B <= 90
Tensile Strength, Ultimate >= 414 MPa
Tensile Strength, Yield 360 MPa
@Strain 0.2 %
Elongation at Break >= 20 %in 2 inches
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.0000570 ohm-cm
 
Thermal PropertiesOriginal ValueComments
CTE, linear 11.0 µm/m-°C
@Temperature 0.000 - 100 °C
Specific Heat Capacity 0.427 J/g-°C
@Temperature 0.000 - 100 °C
Thermal Conductivity 26.8 W/m-K
@Temperature 100 °C
 
Component Elements PropertiesOriginal ValueComments
Carbon, C <= 0.025 %
Chromium, Cr 17.5 - 19.5 %
Iron, Fe >= 74.105 %As Remainder
Manganese, Mn <= 1.0 %
Molybdenum, Mo 1.75 - 2.5 %
Nickel, Ni <= 1.0 %
Other, total 0.20 - 0.80 %
Phosphorus, P <= 0.040 %
Silicon, Si <= 1.0 %
Sulfur, S <= 0.030 %

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Overview of materials for T 400 Series Stainless Steel

NAKS100 / 14703

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