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Latrobe LSSâ„¢ 420 Supreme Plastic Mold Steel (AISI 420)

Category Metal , Ferrous Metal , Stainless Steel , Tool Steel , Mold 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 LSSâ„¢ 420 Supreme Plastic Mold Steel (AISI 420).pdf
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Material Notes:
TLS 420 Supreme is a specially-refined, mold-quality stainless steel that is engineered to provide supreme polishability, good corrosion resistance, and good wear resistance. TLS 420 supreme is manufactured using special melting and remelting techniques. These special melting practices along with proprietary forging practices result in the highest levels of microcleanliness and a homogeneous microstructure. TLS 420 Supreme is the material of choice for the manufacture of plastic molding tools that require the highest lens-quality polished finishes. Typical applications include molds for compact disks (CDs), medical laboratory equipment, optical lenses, and other components, which require critical surface finishes.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 7.75 g/cc
7.75 g/cc
Density 7.75 g/cc
0.280 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell C 52
52
Air Cooled from 982°C, 30 minutes
55.5
55.5
Air Cooled from 1010°C, 30 minutes
56.5
56.5
Air Cooled from 1038°C, 30 minutes
Modulus of Elasticity 200 GPa
29000 ksi
Machinability 55 - 60 %
55 - 60 %
1% Carbon Steel
Izod Impact Unnotched 13.6 J
10.0 ft-lb
Air Cooled from 1010°C; 393°C Temper Temperature
20.3 J
15.0 ft-lb
Air Cooled from 1010°C; 593°C Temper Temperature
Thermal Properties Metric English Comments
CTE, linear 10.2 µm/m-°C

@Temperature 20.0 - 100 °C
5.67 µin/in-°F

@Temperature 68.0 - 212 °F
11.7 µm/m-°C

@Temperature 20.0 - 538 °C
6.50 µin/in-°F

@Temperature 68.0 - 1000 °F
Thermal Conductivity 22.84 W/m-K

@Temperature 20.0 °C
158.5 BTU-in/hr-ft²-°F

@Temperature 68.0 °F
23.93 W/m-K

@Temperature 199 °C
166.1 BTU-in/hr-ft²-°F

@Temperature 390 °F
24.95 W/m-K

@Temperature 399 °C
173.2 BTU-in/hr-ft²-°F

@Temperature 750 °F
Component Elements Properties Metric English Comments
Chromium, Cr 13.6 %
13.6 %
Iron, Fe 84.87 %
84.87 %
Manganese, Mn 0.45 %
0.45 %
Other 0.38 %
0.38 %
Silicon, Si 0.40 %
0.40 %
Vanadium, V 0.30 %
0.30 %
Chemical Properties Metric English Comments
Critical Temperature 802 °C
1480 °F
Ac1
863 °C
1590 °F
Ac3
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