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Ensinger PEI

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AISI Type W1 Tool Steel, water quenched at 775°C (1425°F), tempered 350°C (660°F)
Categories: Metal; Ferrous Metal; Carbon Steel; High Carbon Steel; Tool Steel; Water-Hardening Steel

Material Notes: The highest quality, water hardening carbon tool steel, controlled for hardenability and subject to the most rigid tests to ensure maximum uniformity in performance, with a composition held to closest limits.

Key Words: UNS T72301
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Physical PropertiesOriginal ValueComments
Density 7.83 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 498Converted from Rockwell C Hardness.
Hardness, Knoop 558Converted from Rockwell C Hardness.
Hardness, Rockwell C 50 - 51370°C temper
Hardness, Vickers 531Converted from Rockwell C Hardness.
Tensile Strength, Ultimate 1680 MPa
Tensile Strength, Yield 1500 MPa
Elongation at Break 3.5 %
Modulus of Elasticity 205 GPa
Bulk Modulus 160 GPaTypical for steels.
Poissons Ratio 0.28
Machinability 40 %Based on AISI 1212 steel = 100%
Shear Modulus 80.0 GPa
Charpy Impact, Unnotched 86.0 J
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.0000300 ohm-cmat 20ºC
 
Thermal PropertiesOriginal ValueComments
CTE, linear 10.4 µm/m-°C
@Temperature 20.0 - 100 °C
 12.2 µm/m-°C
@Temperature 0.000 - 300 °C
 13.8 µm/m-°C
@Temperature 0.000 - 500 °C
Specific Heat Capacity 0.461 J/g-°C
@Temperature 0.000 - 100 °C
Thermal Conductivity 48.0 W/m-K
 
Processing PropertiesOriginal ValueComments
Processing Temperature 175 - 345 °CTempering Temperature
 760 - 845 °CHardening Temperature
Annealing Temperature 740 - 790 °C
 
Component Elements PropertiesOriginal ValueComments
Carbon, C 0.70 - 1.5 %usually 0.90% to 1.10%
Chromium, Cr <= 0.15 %
Iron, Fe 97.2 - 99.2 %As Balance
Manganese, Mn 0.10 - 0.40 %
Molybdenum, Mo <= 0.10 %
Phosphorus, P <= 0.025 %
Silicon, Si 0.10 - 0.40 %
Sulfur, S <= 0.025 %
Tungsten, W <= 0.15 %
Vanadium, V <= 0.10 %

References for this datasheet.

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AISI Type W5 Tool Steel
Overview of materials for Water-Hardening Steel

MSTW1B / 14107

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