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Latrobe Tatmo-VN™ ASTM M7 High Speed Steel

Category Metal , Ferrous Metal , Alloy Steel , Carbon Steel , High Carbon Steel , Tool Steel
Manufacturer Latrobe Steel
Trade Name Tatmo-VN™
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Latrobe Tatmo-VN™ ASTM M7 High Speed Steel.pdf
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Material Notes:
TATMO-VN is an M7 type high speed steel modified by alloy balancing and a nitrogen addition to develop superior hardness response in heat treatment. It is an excellent grade for many cutting tool applications that require an optimum balance of red hardness, edge toughness and wear resistance. The combination of outstanding properties and high hardness response makes Tatmo-VN a logical alternative for cobalt high speed steels in may cutting tool applications. Typical applications for Tatmo-VN high speed steel include twist drills, taps, end mills, reamers and milling cutters.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 7.94 g/cc
7.94 g/cc
Density 7.94 g/cc
0.287 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell C 59.0
59.0
Oil Quenched at 1218°C; 622°C Temper Temperature
63
63
Oil Quenched from 1191°C; 482°C Temper Temperature
63
63
Oil Quenched from 1191°C; 482°C Temper Temperature
63.5
63.5
Oil Quenched at 1218°C; 482°C Temper Temperature
66.1
66.1
Oil Quenched from 1191°C; 538°C Temper Temperature
66.5
66.5
Oil Quenched at 1218°C; 538°C Temper Temperature
Modulus of Elasticity 207 GPa
30000 ksi
Machinability 45 - 50 %
45 - 50 %
1% Carbon Steel
Izod Impact Unnotched 28.5 J
21.0 ft-lb
Oil Quenched at 1218°C; 482°C Temper Temperature
32.5 J
24.0 ft-lb
Oil Quenched at 1218°C; 594°C Temper Temperature
36.6 J
27.0 ft-lb
Oil Quenched at 1218°C; 622°C Temper Temperature
39.3 J
29.0 ft-lb
Oil Quenched at 1191°C; 594°C
42.0 J
31.0 ft-lb
Oil Quenched at 1191°C; 482°C
52.9 J
39.0 ft-lb
Oil Quenched at 1191°C; 622°C
Thermal Properties Metric English Comments
CTE, linear 11.68 µm/m-°C

@Temperature 21.0 - 204 °C
6.489 µin/in-°F

@Temperature 69.8 - 399 °F
13.3 µm/m-°C

@Temperature 21.0 - 538 °C
7.39 µin/in-°F

@Temperature 69.8 - 1000 °F
Component Elements Properties Metric English Comments
Carbon, C 1.02 %
1.02 %
Chromium, Cr 3.75 %
3.75 %
Iron, Fe 82.53 %
82.53 %
Manganese, Mn 0.25 %
0.25 %
Molybdenum, Mo 8.5 %
8.5 %
Silicon, Si 0.30 %
0.30 %
Tungsten, W 1.75 %
1.75 %
Vanadium, V 1.9 %
1.9 %
Chemical Properties Metric English Comments
Critical Temperature 749 °C
1380 °F
Ar3
780 °C
1440 °F
Ar1
824 °C
1520 °F
Ac1
860 °C
1580 °F
Ac3
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