HIGH SPEED STEEL M42

M42 is a profoundly cobalt alloyed high speed steel to be utilized when the interest for hot hardness is of great significance.

M42 has a decent machinability and a decent wear resistance.Great cutting performance can be accomplished from tools made in M42 high speed steel. With the high heat treated hardness of up to 70 Rockwell M42 high speed steel also offers excellent wear resistance.




Chemical Composition


Elements
Min
Max
Carbon, C0.700.85
Manganese, Mn0.000.40
Silicon, Si0.000.40
Molybdenum, Mo0.000.00
Chromium,Cr4.505.50
W17.0019.00
V0.801.20
Co4.505.50

Physical Properties


Properties
Metric
Imperial
Density7.81 g/cm30.282 lb/in3

Mechanical Properties


Properties
Metric
Imperial
Hardness, Rockwell C (oil quenched from 1204°C, 5 minutes)64.364.3
Hardness, Rockwell C (oil quenched from 1177°C, 5 minutes)65.565.5
Hardness, Rockwell C(oil quenched from 1163°C)65.865.8
Izod impact unnotched (oil quenched at 1191°C; 510°C temper temperature)13.6 J10.0 ft- lb
Izod impact unnotched (oil quenched at 1191°C; 622°C temper temperature)24.4 J25.8
Machinability (1% carbon steel)35.0 - 40.0%35.0 - 40.0%
Poisson's ratio0.27-0.300.27-0.30
Elastic modulus190-210 GPa27557-30458 ksi


Features


   Heat Treatment

   Tempering

   Annealing

   Machinability

   Hardening

   Stress Relieving

   Quenching

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