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Ensinger PEI

AISI Type S2 Tool Steel, austenitized 845°C (1550°F), brine quenched to 35 HRC
Categories: Metal; Ferrous Metal; Alloy Steel; Medium Alloy Steel; Tool Steel; Shock-Resisting Steel

Material Notes: Brine quenched sample, 35 HRC. Type S2 is ideal when toughness is a primary requirement. Case hardening gives a hard surface while preserving the core toughness.

Key Words: UNS T41902
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Physical PropertiesMetricEnglishComments
Density 7.83 g/cc0.283 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Knoop 352352Converted from Rockwell C Hardness.
Hardness, Rockwell C 3535
Hardness, Vickers 340340Converted from Rockwell C Hardness.
Tensile Strength, Ultimate 1050 MPa152000 psi
Tensile Strength, Yield 950 MPa138000 psi
Elongation at Break 19 %19 %in 50 mm
Bulk Modulus 160 GPa23200 ksiTypical for steel
Shear Modulus 80.0 GPa11600 ksiTypical for steel
 
Thermal PropertiesMetricEnglishComments
CTE, linear  10.9 µm/m-°C
@Temperature 20.0 - 100 °C
6.06 µin/in-°F
@Temperature 68.0 - 212 °F
 13.0 µm/m-°C
@Temperature 0.000 - 300 °C
7.22 µin/in-°F
@Temperature 32.0 - 572 °F
 14.1 µm/m-°C
@Temperature 0.000 - 500 °C
7.83 µin/in-°F
@Temperature 32.0 - 932 °F
 
Processing PropertiesMetricEnglishComments
Processing Temperature 175 - 425 °C347 - 797 °FTempering Temperature
 845 - 900 °C1550 - 1650 °FHardening Temperature
Annealing Temperature 760 - 790 °C1400 - 1450 °F
 
Component Elements PropertiesMetricEnglishComments
Carbon, C 0.40 - 0.55 %0.40 - 0.55 %
Iron, Fe 97 %97 %As Balance
Manganese, Mn 0.40 %0.40 %
Molybdenum, Mo 0.40 %0.40 %
Phosphorus, P <= 0.030 %<= 0.030 %
Silicon, Si 1.05 %1.05 %
Sulfur, S <= 0.030 %<= 0.030 %
Vanadium, V <= 0.50 %<= 0.50 %

References for this datasheet.

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