M42 High Speed Steel

M35- high speed steels
Hot Work Tool Steel waiting in the Otai Warehouse

M42 High speed steel china supplier and and stockholders. Otai Special steel is supplier in round bar, plate, flat, square M42 tool steel material.

The M42 High Speed Steel is known for its balanced combination of abrasion resistance, toughness and good red hardness.M42 is a tungsten-molybdenum high speed steel. it is used in a variety of applications and worldwide. M42 steel is the most popular high speed steel because of its superior qualities. it?has an outstanding combination of toughness properties and abrasion resistance when correctly hardened and tempered.

M42 steel properties Related Specifications ASTM A600-1999 JIS G4403 GB/T 9943 DIN W N-r 17350

Chemical composition and M42 tool steel?equivalent grade

Grade NO. C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Mo(%) V(%) W(%) Co(%)
?M2-ASTM A681 1.05~1.15 0.15~0.65 0.15~0.40 ≤0.030 ≤0.030 3.50~4.25 9.00~10.00 0.95~1.35 1.15~1.85 7.75~8.75
1.3247-DIN 17350 1.05~1.12 ≤0.45 ≤0.40 ≤0.030 ≤0.030 3.60~4.40 9.00~10.0 1.00~1.30 1.20~1.80 7.50~8.50
SKH59-JIS G4403 1.05~1.15 ≤0.70 ≤0.40 ≤0.030 ≤0.030 3.50~4.50 9.00~10.00 0.90~1.30 1.20~1.90 7.50~8.50
W2Mo9Cr4VCo8-GB/T 9943 1.05~1.15 0.15~0.65 0.15~0.40 ≤0.030 ≤0.030 3.50~4.25 9.00~10.00 0.95~1.35 1.15~1.85 7.75~8.75


Form of Supply

For M42 high speed steel supply, we can supply the?round bar, flat bar, plate and square block. M42 Diameters can be sawn to your required lengths as one offs or multiple cut pieces. Rectangular pieces can be sawn from flat bar or plate to your specific sizes. Ground tool steel bar can be supplied, providing a quality precision finished bar to tight tolerances.


M42 High Speed Steel is used high production machine work and is used for various cutting tool, knife and punch and die applications. Some of these applications include Twist drills, taps, milling cutters, reamers, broaches, saws, cold work steel ?tools.

Regular size and Tolerance

M42 tool steel Round bar: Diameter 2mm-800mm

M42 tool steel Plate: thickness 1mm-800mm x 100-810m

High speed steel M42 Flat / square bar: Thickness 1mm-200mm x 1mm-200mm

Others have not specified size, pls contact our?experienced sales team.


Properties of HSS M42 tool steel

  • Machanical & Physical Properties?of M42 molybdenum high speed tool steel
Density of M42 high tool steel HSS ?Mechanical Properties of M42 steel
Metric Imperial Hardness, Rock C, Oil quenched 64-66 HRc
7.81 kg/cm3 0.282 lb/in3 Izod impact unnotched,Temper 13-25 J
Machinability (1% carbon steel) Poisson’s ratio 0.27-0.30
35.0 – 40.0% Elastic modulus 190-210 GPa


M42 High Speed steel round bar and flat sections can be cut to your required sizes. M42 High Speed ground steel bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. M42 High Speed steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.


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