HIGH SPEED STEEL M2

M2 High Speed Steel is a tungsten-molybdenum high speed steel with a very much adjusted arrangement reasonable for a wide variety of uses.

This grade is described by balanced combination of abrasion resistance, toughness and good red hardness. Because of its nearly low carbon content, M2 has a great mix of strength properties and abrasion resistance when properly hardened and tempered. M2 is widely used in cutting device, blade and punch and kick and die applications.


World wide, the M2 type is by far the most popular high speed steel having replaced T1 high speed in most applications because of its superior properties and relative economy.



Chemical Composition


Element
Min
Max
Carbon, C0.800.90
Manganese, Mn-.--0.40
Silicon, Si-.--0.40
Molybdenum, Mo4.505.50
Chromium,Cr3.804.50
W5.506.70
V1.602.20

Physical Properties


Properties
Metric
Imperial
Density8.16 g/cm30.294 lb/in3
Melting point4680°C2600°F

Mechanical Properties


Properties
Metric
Imperial
Hardness, Rockwell C (tempered at 1150°F, quenched at 2200°F)6262
Hardness, Rockwell C (as hardened, quenched at 2200°F)6565
Compressive yield strength (when tempered at 300°F)3250 MPa471000 psi
Izod impact unnotched (when tempered at 300°F)67 J49.4 ft-lb
Abrasion (loss in mm3, as-hardened; ASTM G65)25.825.8
Abrasion (loss in mm3, tempered at 1275°F; ASTM G65)77.777.7
Poisson's ratio0.27-0.300.27-0.30
Elastic modulus190-210 GPa27557-30458 ksi

Thermal Properties


Properties
Metric
Imperial
CTE, linear (@20.0 - 100°C/ 68.0 - 212°F)10 μm/m°C5.56 μin/in°F
CTE, linear (@20.0 - 500°C/68.0 - 932°F)12.2 μm/m°C6.78 μin/in°F
CTE, linear (@20.0 - 850°C/68.0 - 1560°F)12.6 μm/m°C7 μin/in°F


Features


   Heat Treatment

   Tempering

   Annealing

   Machinability

   Hardening

   Stress Relieving

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