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Ensinger PEI

Latrobe LSS™ S7 Shock-Resisting Tool Steel (ASTM S7)
Categories: Metal; Ferrous Metal; Alloy Steel; Carbon Steel; Medium Carbon Steel; Tool Steel; Air-Hardening Steel; Oil-Hardening Steel

Material Notes: TLS S7 Shock-Resisting tool steel is an air or oil hardening tool steel that is characterized by very high impact toughness. The combination of strength and high toughness makes S7 tool steel a candidate for a wide variety of tooling applications. TLS S7 tool steel can be used successfully for both cold and hot work applications. It is recommended for cold work tools which require resistance to high impact and shock loading, such as shear blades, swaging dies, gripper dies, chisels, and punches. TLS S7 tool steel is also suitable for hot work tools where the operating temperature does not exceed 1000°F (538°C). For plastic injection molds, TLS S7 tool steel is available as a remelted, mold-quality product. The remelting process minimizes the number and sizes of nonmetallic inclusions in the steel, and thereby enhances the polishability for critical cavity, insert, and other tooling surfaces.

Information Provided by Timken Latrobe Steel.

Timken sold Latrobe in December 2006. They are now Latrobe Specialty Steels Co.

Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Specific Gravity 7.83 g/cc7.83 g/cc
Density 7.83 g/cc0.283 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell C 4141Air Cooled from 941°C, 649°C Temper Temperature
 5353Air Cooled from 941°C, 449°C Temper Temperature
 5757Air Cooled from 941°C, 149°C Temper Temperature
Modulus of Elasticity 207 GPa30000 ksi
Machinability 70 - 75 %70 - 75 %1% Carbon Steel
Charpy Impact 13.6 J10.0 ft-lbV-Notch; Air Cooled from 941°C; 425°C Temper Temperature
 16.3 J12.0 ft-lbV-Notch; Air Cooled from 941°C; 649°C Temper Temperature
 16.9 J12.5 ft-lbV-Notch; Air Cooled from 941°C; 200°C Temper Temperature
 
Thermal PropertiesMetricEnglishComments
CTE, linear  12.4 µm/m-°C
@Temperature 21.0 - 100 °C
6.89 µin/in-°F
@Temperature 69.8 - 212 °F
 13.66 µm/m-°C
@Temperature 21.0 - 500 °C
7.589 µin/in-°F
@Temperature 69.8 - 932 °F
Thermal Conductivity 28.5 W/m-K198 BTU-in/hr-ft²-°F
 
Processing PropertiesMetricEnglishComments
Processing Temperature 710 °C1310 °FCritical Temperaure Ar3
 754 °C1390 °FCritical Temperaure Ar1
 793 °C1460 °FCritical Temperaure Ac1
 838 °C1540 °FCritical Temperaure Ac3
 
Component Elements PropertiesMetricEnglishComments
Carbon, C 0.50 %0.50 %
Chromium, Cr 3.25 %3.25 %
Iron, Fe 93.85 %93.85 %
Manganese, Mn 0.75 %0.75 %
Molybdenum, Mo 1.4 %1.4 %
Silicon, Si 0.25 %0.25 %

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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NTIMK119 / 19466

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