Form of Supply
All sizes are available (both flat and round).
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M-2
M-2 High Speed Steel
It is a tungsten molybdenum HSS. It is a cold
forming and cutting tool, mainly used for producing machine tool bits. It is
a high carbon version of M1 Tool Steel. Due to it’s uniformly
distributed carbides, it has high wear resistance. High toughness with good
cutting edge retention are it’s main characteristics.
Applications
Applications
- Cutting tools
- Knives
- Punches
- Twist drills
- Reamers
- Broaching tools
- Taps
- Die applications
- Reamers
- Milling tools
- Metal saw
- For cold forming tools such as extrusion rams and dies
- Cutting tools
- Plastic moulds with elevated wear resistance and screws
- Countersinks
Typical Analysis :
Forging
M2 steel component is slowly and uniformly pre-heated to 850-900°C and then the heat is increased till forging temperature of 1050-1150°C. If during the forging the temperature of the material drops below 880-900°C, Re heating is necessary if temperature of the M2 material gets below 880-900°C . After forging,slowly the M2 component should be cooled down.
Annealing
Annealing should be done after hot working and before the component is re hardened. M2 high speed steel is heated to 850°C at a rate of no more than 220°C per hour. Always hold at temperature for one hour / 25mm of thickness (with minimum two hours ). Then slowly it is cooled in the furnace. Annealed hardness>= 248 Brinell
Stress Relieving
Stress Relieving is done in order to minimize the distortion< if the tools made from this steel are heavily machined or are ground.The component is heated to 675-725°C ,soaked well (2hours approx.)and cooled in the air. Then the finishing of the tool is done.
Hardening
M2 steel is preheated in 2 steps- firstly at 450-500°C then 850-900°C. Then it is heated to the final hardening temperature ,i.e.,1200-1250°C . NOTE: Donot allow the component to stand too long at hardening temperature. Quenching is done in warm oil or brine. If quenching done in brine lets the tools to equalize, then quenching in air is done. If the quenching is done in oil, then remove the M2 component from the oil at 500°C and then cool in air. Vacuum hardening can also be done.
Tempering
The component needs to be tempered immediately after quenching.Uniform heating to the selected tempering temperature is done and it must be held for at least two hours (one hour per 25mm of total thickness). Double tempering is recommended and for the tools that are cut by wire EDM,we recommend triple tempering .
Physical Properties
Final Grinding : It needs to be done in good condition using a suitable dressing tool.Wet grinding is preferable.
Heat Treatment : This procedure will vary according to the shape and size of M2 tool component.Rate of heating,rate of cooling and soaking time depends on M2 shape and size.Other factors like type of furnace,medium for quenching etc also matter.
| Carbon | Chromium | Iron | Manganese | Molybdenum | Phosphorus | Silicon | Sulphur | Tungsten | Vanadium |
| 0.78 – 1.0% | 3.75 – 4.5% | Balance | 0.15 – 0.4% | 4.5 – 5.5% | 0.03 max% | 0.2 – 0.45% | 0.03 max% | 5.5 – 6.75% | 1.75 – 2.2% |
Forging
M2 steel component is slowly and uniformly pre-heated to 850-900°C and then the heat is increased till forging temperature of 1050-1150°C. If during the forging the temperature of the material drops below 880-900°C, Re heating is necessary if temperature of the M2 material gets below 880-900°C . After forging,slowly the M2 component should be cooled down.
Annealing
Annealing should be done after hot working and before the component is re hardened. M2 high speed steel is heated to 850°C at a rate of no more than 220°C per hour. Always hold at temperature for one hour / 25mm of thickness (with minimum two hours ). Then slowly it is cooled in the furnace. Annealed hardness>= 248 Brinell
Stress Relieving
Stress Relieving is done in order to minimize the distortion< if the tools made from this steel are heavily machined or are ground.The component is heated to 675-725°C ,soaked well (2hours approx.)and cooled in the air. Then the finishing of the tool is done.
Hardening
M2 steel is preheated in 2 steps- firstly at 450-500°C then 850-900°C. Then it is heated to the final hardening temperature ,i.e.,1200-1250°C . NOTE: Donot allow the component to stand too long at hardening temperature. Quenching is done in warm oil or brine. If quenching done in brine lets the tools to equalize, then quenching in air is done. If the quenching is done in oil, then remove the M2 component from the oil at 500°C and then cool in air. Vacuum hardening can also be done.
Tempering
The component needs to be tempered immediately after quenching.Uniform heating to the selected tempering temperature is done and it must be held for at least two hours (one hour per 25mm of total thickness). Double tempering is recommended and for the tools that are cut by wire EDM,we recommend triple tempering .
Physical Properties
| Physical properties | Metric | Imperial |
| Density | 8.16 g/cm3 | 0.294 lb/in3 |
| Melting Point | 4680°C | 2600°F |
Final Grinding : It needs to be done in good condition using a suitable dressing tool.Wet grinding is preferable.
Heat Treatment : This procedure will vary according to the shape and size of M2 tool component.Rate of heating,rate of cooling and soaking time depends on M2 shape and size.Other factors like type of furnace,medium for quenching etc also matter.
