AISI M2 High Speed Steel | 1.3343 | SKH51 |M2 Tool Steel | W6Mo5Cr4V2

The M2 steel is a High Speed Tool Steel. It is known for its balanced combination of abrasion resistance, toughness and good red hardness. it is a tungsten-molybdenum high speed steel, M2 high speed tool steel is used in a variety of applications and worldwide. M2 tool steel is the most popular high speed steel because of its superior qualities. As a result of its low carbon content, M2 high speed tool steel has an outstanding combination of toughness properties and abrasion resistance when correctly hardened and tempered.

Related Specifications ASTM A600-1999 | GB/T9943-1988｜JIS G4403-2000

Related Specifications and Equivalent of ASTM M2 high speed tool steel with others HHS Material Standard

Country American Germany Japanese Chinese
Standard ASTM A600-1999 DIN 17350-1980 JIS G4403-2000 GB/T 9943-2008
Grades M2 1.3343 SKH51 W6Mo5Cr4V2

 

Chemical Composition contrast of ASTM M2 high speed tool steel with other Equivalent HSS steel Material

Grade NO. C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Mo(%) V(%) W(%)
M2 0.78～0.88 0.20～0.45 0.15～0.40 ≤0.030 ≤0.030 3.75～4.50 4.50～5.50 1.75～2.20 5.50～6.75
1.3343 0.86～0.94 ≤0.45 ≤0.40 ≤0.030 ≤0.030 3.80～4.50 4.70～5.20 1.70～2.00 6.00～6.70
SKH51 0.80～0.88 ≤0.45 ≤0.40 ≤0.030 ≤0.030 3.80～4.50 4.70～5.20 1.70～2.10 5.90～6.70
W6Mo5Cr4V2 0.80～0.90 0.20～0.45 0.15～0.40 ≤0.030 ≤0.030 3.80～4.40 4.50～5.50 1.75～2.20 5.50～6.75

 

Form of Supply

ASTM/AISI M2 high speed steel, we can supply the M2 steel round bar, M2 steel flat bar, M2 steel plate and M2 steel square block. M2 high speed tool steel round bar can be sawn to your required lengths as one offs or multiple cut pieces. M2 high speed tool steel Rectangular pieces can be sawn from flat bar or plate to your specific sizes. M2 Ground tool steel bar can be supplied, providing a quality precision finished bar to tight tolerances.

Regular size and Tolerance

1) Hot Rolled round bar
Diameter
(mm)		 Diameter Tolerance
(mm)		 Diameter
(mm)		 Diameter Tolerance
(mm)
6.4～15.8 -0.038 ～0.038 181～<206.2 0～1.6
15.8～<77.6 0～0.10 206.2～<257 0～2.4
77.6～<103 0～0.15 257～<307.7 0～3.2
103～<181 0～0.78 ≥307.7 0～4.7
2) Hot Rolled steel plate
Thickness
(mm)		 Thickness Tolerance
(mm)		 Thickness
(mm)		 Thickness Tolerance
(mm)
≤25.4 -0.41～0.79 >127～152 -1.60～2.39
>25.4～76 -0.79～1.19 >178～254 -1.98～3.18
>76～127 -1.19～1.60 >254～305 -2.39～3.96

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

Heat treatment related specifications of ASTM M2 high speed tool steel

  • Annealing of M2 HSS tool steel material  

ASTM M2 high speed tool steel annealing is recommended before Re-hardening. Heating the M2 high speed tool steel to 850°C , The rate of less than 220°C per hour. Keep at temperature for 1 hour per inch(25.4mm) of thickness (with 2 hours being Min). Cool slowly in the heat treatment furnace . The annealed hardness should be 248 HB(Brinell) or lower.

  • Stress Relieving of M2 HSS tool steel material  

For get good Machinability, the Stress Relieving is very important. When ASTM M2 high speed tool steel are heavily machined or ground for tools products.it is recommended to stress relieve after machined and prior to hardening to Min the possibility of distortion. For stress relieve heating the component to 680-720°C and soak well about approximately 2 hours, then put in air cool. The tools products can be finish machined before heat treatment.

  • Hardening of M2 tool steel HSS material

First Pre-heating M2 steel to 460-500°C, then heating 860-900°C. Third continue heating to 1200-1250°C for hardening temperature and ensure the component is heated through. Care must be taken not to allow the component to remain too long at the hardening temperature. The last Quench in warm oil or brine. If quenching in brine allow the tools to equalize, then complete the quench in air. If quenching in oil remove the component from the oil at about 510°C ,then air cool. The vacuum hardening alos is suitable for M2 high speed steel -M2 HSS material.

  • Tempering of M2 high speed tool steel material(HSS steel)

Tempering for M2 steel. Double tempering is mandatory and for tools cut by wire EDM triple tempering is strongly recommended if can. After quenching, the temper the component immediately . Uniformly and thoroughly heating to the selected tempering temperature and hold for at least 2 hours (one hour per inch(25.4mm)of total thickness).

Temperature (°C) 300 400 500 550 600 650
Hardness
(°C)		 62 63 64 65 64 61

Applications

M2 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, and knives.

Processing

M2 High Speed tool steel round bar and flat sections can be cut to your required sizes. M2 High Speed ground steel bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. M2 High Speed steel also is available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.

Contact

Contact our experienced sales team to help you with your M2 High Speed Steel questions.by Email or Telphone. The questions will be reply in 24 hours.

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