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Latrobe LSS™ S7 Shock-Resisting Tool Steel (ASTM S7)

Category Metal , Ferrous Metal , Alloy Steel , Carbon Steel , Medium Carbon Steel , Tool Steel , Air-Hardening Steel , Oil-Hardening Steel
Manufacturer Latrobe Steel
Trade Name LSS™
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Latrobe LSS™ S7 Shock-Resisting Tool Steel (ASTM S7).pdf
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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.
Physical Properties Metric English Comments
Specific Gravity 7.83 g/cc
7.83 g/cc
Density 7.83 g/cc
0.283 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell C 41
41
Air Cooled from 941°C, 649°C Temper Temperature
53
53
Air Cooled from 941°C, 449°C Temper Temperature
57
57
Air Cooled from 941°C, 149°C Temper Temperature
Modulus of Elasticity 207 GPa
30000 ksi
Machinability 70 - 75 %
70 - 75 %
1% Carbon Steel
Charpy Impact 13.6 J
10.0 ft-lb
V-Notch; Air Cooled from 941°C; 425°C Temper Temperature
16.3 J
12.0 ft-lb
V-Notch; Air Cooled from 941°C; 649°C Temper Temperature
16.9 J
12.5 ft-lb
V-Notch; Air Cooled from 941°C; 200°C Temper Temperature
Thermal Properties Metric English Comments
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-K
198 BTU-in/hr-ft²-°F
Component Elements Properties Metric English Comments
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 %
Chemical Properties Metric English Comments
Critical Temperature 710 °C
1310 °F
Ar3
754 °C
1390 °F
Ar1
793 °C
1460 °F
Ac1
838 °C
1540 °F
Ac3
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