AISI/SAE M2 High speed Steel
AISI/SAE M2 is a Tungsten Molybdenum general purpose high speed steel. M2 High Speed Steel is characterised by having small and evenly distributed carbides, giving well balanced toughness, wear resistance and red hardness properties. Capable of acheiving 64-66 HRC after treatment. It is by far the most popular high speed steel for most applications because of its superior properties such as its bending strength, toughness, edge holding and thermo plasticity. M2 High Speed Steel is a great allrounder with good machinability, in this respect it is superior to the high alloyed cold work steels.
| AISI/SAE M2 High Speed Steel - Typical Chemical Analysis wt % | ||||
| C | Cr | Mo | W | V |
| 0.85 | 4.20 | 5.00 | 6.40 | 1.80 |
Applications for AISI/SAE AISI/SAE M2 High speed steel
Typical applications for AISI/SAE M2 High Speed Steel include Shear blades, woodworking tools, circular saw segments, metal cutting tools, milling cutters, mould liners, saws, and knives.
Soft Annealing AISI/SAE M2 high speed steel
In order to avoid decarburization, M2 High Speed Steel should be annealed in a controlled neutral atmosphere, ie a vacume furnace
Heat rate 222°C per hour to 840°C - Soak thoroughly at heat - Furnace cool 28°C per hour to 538°C - Continue cooling in furnace or air.
Aproximate annealed hardness 241 HB Max.
Machineability of m2 high speed steel
M2 is classified as a medium machinability tool steel in the annealed condition. it has a machinability rating of 65% when compared to a 1% carbon steel rated at 100.
| AISI/SAE M2 High Speed Steel Steel - Mechanical Properties at ambient temperature | ||||||
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Tempered at 620°C - Quenched at 1205°C - Hardness 62 HRC As Hardened - Quenched at 1205°C - Hardness 65 HRC Compressive yeild strength - Tempered at 150°C - 3250 MPa Izod impact unnotched - Tempered at 150°C - 67 J Abrasion - Loss in mm³ as hardend - ASTM G65 - 25.8mm³ |
Forging AISI/SAE M2 High Speed steel
Pre heat slowly and uniformly 850-900°C - The heat should then be increased more quickly to the forging temprature of 1050-1150°C - If during forging the temprature of the material should drop below 880-900°C reheating will be necessary. Cool the M2 very slowly after forging
Hardening AISI/SAE M2 High Speed STeel
Pre heat the material in two steps - 450-500°C then 850-900°C - Continue heating to the final hardening temprature of 1200-1250°C
Follow by quenching in oil or brine.
If quenching in oil remove the the component(s) from the oil at approximately 500°C then cool in air.
Tempering AISI/SAE M2 High Speed STeel
Tempering temperature: 3 x 1 Hour at 540-560°C
Heat Treatment Advise of AISI/SAE M2 High Speed STeel
Treatment temperatures, including the rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each 1.3343 High Speed Steel component. other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance for the heat treatment of M2 High Speed Steel.
| AISI/SAE M2 High Speed Steel - Physical properties | ||||||
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Density - 8138 kg/m³ Modulus of elasticity - (10³ x N/mm²) : 217 Specific Gravity - 815 Thermal conductivity. (W/m/°K): 19.0 Electric resistivity. (Ohm mm²/m): 0.54 Specific heat capacity. (J/g.K): 0.46 Magnetisable. Yes |
Welding of AISI/SAE M2 High Speed steel
We recommend specialist advice to be sought
Disclaimer
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustrations to enable the reader to make their own evaluations. They are not intended to either express or imply the suitability for these or any other purposes
