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Ensinger PEI

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Crucible Steel 440C Chromium Steel
Categories: Metal; Ferrous Metal; Stainless Steel; T 400 Series Stainless Steel

Material Notes: Crucible 440C is a hardenable chromium steel. It has one of the highest attainable hardnesses of the corrosion and heat resisting grades. This grade is magnetic at all times.

Information provided by Crucible Industries

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Physical PropertiesOriginal ValueComments
Density 0.276 lb/in³
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 230
Hardness, Rockwell C 59as quenched
 51
@Tempering Temp. 538 °C
 54
@Tempering Temp. 316 °C
 55
@Tempering Temp. 427 °C
 56
@Tempering Temp. 204 °C
 59
@Tempering Temp. 100 °C
Tensile Strength, Ultimate 110 ksi
Tensile Strength, Yield 65.0 ksi
Elongation at Break 14 %in 2"
Reduction of Area 25 %
Modulus of Elasticity 29000 ksi
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.0000599 ohm-cm
 
Thermal PropertiesOriginal ValueComments
CTE, linear 5.70 µin/in-°F
@Temperature 0.000 - 100 °C
 6.00 µin/in-°F
@Temperature 0.000 - 316 °C
Specific Heat Capacity 0.110 BTU/lb-°F
Thermal Conductivity 168 BTU-in/hr-ft²-°F
Melting Point 2500 - 2700 °F
Solidus 1370 °C
Liquidus 1480 °C
 
Component Elements PropertiesOriginal ValueComments
Carbon, C 0.95 - 1.2 %
Chromium, Cr 16 - 18 %
Iron, Fe >= 79.1 %as balance
Manganese, Mn <= 1.0 %
Molybdenum, Mo <= 0.75 %
Phosphorus, P <= 0.40 %
Silicon, Si <= 1.0 %
Sulfur, S <= 0.030 %

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