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Latrobe LSSâ„¢ H12 Hot Work Tool Steel (ASTM H12)

Category Metal , Ferrous Metal , Alloy Steel , Tool Steel , Hot Work Steel
Manufacturer Latrobe Steel
Trade Name LSS™
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Latrobe LSSâ„¢ H12 Hot Work Tool Steel (ASTM H12).pdf
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Material Notes:
TLS H12 hot work tool steel is a 5% chromium, general-purpose hot work steel that is characterized by excellent impact toughness. It contains less vanadium than the widely-used H13 hot work tool steel, and the tungsten content provides better temper resistance. TLS H12 hot work tool steel is a deep-hardening, air-hardening steel that exhibits minimal size change during heat treatment. It has good resistance to thermal fatigue cracking (heat checking) and excellent resistance to gross cracking and thermal shock when water cooled in service. TLS H12 hot work tool steel is recommended for hot tooling applications where maximum resistance to cracking is required. Such applications include hot punches, die casting dies, forging dies, hot shear blades, hot gripper dies, and extrusion tooling.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 7.68 g/cc
7.68 g/cc
Density 7.67 g/cc
0.277 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell C 53
53
Air Cooled from 982°C, 45 minutes
54
54
Air Cooled from 1010°C, 45 minutes
55
55
Air Cooled from 1038°C, 45 minutes
Modulus of Elasticity 207 GPa
30000 ksi
159 GPa

@Temperature 538 °C
23000 ksi

@Temperature 1000 °F
186 GPa

@Temperature 204 °C
27000 ksi

@Temperature 400 °F
Machinability 75 - 80 %
75 - 80 %
1% Carbon Steel
Charpy Impact 23.0 J
17.0 ft-lb
V-Notch; Air Cooled from 1010°C; 649°C Temper Temperature
31.2 J
23.0 ft-lb
V-Notch; Air Cooled from 1010°C; As Quenched
33.9 J
25.0 ft-lb
V-Notch; Air Cooled from 1010°C; 172°C Temper Temperature
Thermal Properties Metric English Comments
CTE, linear 11.7 µm/m-°C

@Temperature 27.0 - 204 °C
6.50 µin/in-°F

@Temperature 80.6 - 399 °F
14.0 µm/m-°C

@Temperature 260 - 649 °C
7.78 µin/in-°F

@Temperature 500 - 1200 °F
Thermal Conductivity 18.9 W/m-K

@Temperature 27.0 °C
131 BTU-in/hr-ft²-°F

@Temperature 80.6 °F
25.6 W/m-K

@Temperature 204 °C
178 BTU-in/hr-ft²-°F

@Temperature 399 °F
27.9 W/m-K

@Temperature 760 °C
194 BTU-in/hr-ft²-°F

@Temperature 1400 °F
Component Elements Properties Metric English Comments
Carbon, C 0.35 %
0.35 %
Chromium, Cr 5.0 %
5.0 %
Iron, Fe 90.65 %
90.65 %
Manganese, Mn 0.30 %
0.30 %
Molybdenum, Mo 1.4 %
1.4 %
Silicon, Si 1.0 %
1.0 %
Tungsten, W 1.3 %
1.3 %
Vanadium, V 0.30 %
0.30 %
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