Toolman Special Steels is proud to produce and offer M3 (1.3344) - a highly alloyed high speed steel for good wear resistance and high hardness. M3 Type II is a tungsten molybdenum high speed tool steel designed to provide the great wear resistance required for severe cutting operations with a raised C and V content. It is used for high performance mills, reamers, broaches for processing hard materials as well as in the area of cold work steel e.g. for piercing dies in the manufacture of nuts.
Steel Properties
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Molybdenum high - speed tool steel.
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Basic chemical composition as M2, with higher V- and C- content
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Very high resistance to wear and to softening
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High resistance of blade and good toughness
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Deep hardening response.
Chemical Composition
| Element | Value |
|---|---|
| C | 1.20 |
| Cr | 4.30 |
| Mo | 5.10 |
| W | 6.40 |
| Co | - |
| V | 3.30 |
Mechanical Properties
| Property | Value |
|---|---|
| Hardness (HBW) | 280 max (Annealed) |
| Quenching and Tempering Hardness (HRC) | 64 min |
Physical Properties
| Property | Value |
|---|---|
| Density (g/cm³) | 8.07 |
Modulus of Elasticity
| Temperature (°C) | kN/mm² |
|---|---|
| 20 | 217 |
Thermal Properties
| Temperature (℃) | Thermal Expansion Coefficient (10^-6/℃) |
|---|---|
| 400 | 12.8 |
| 600 | 13 |
Thermal Conductivity
| Temperature (℃) | Thermal Conductivity (W/m•K) |
|---|---|
| 20 | 19 |
HEAT TREATMENT AND PROCESSES
Heat treatment
| Process | Steps | Temperature | Details | Resulting Hardness |
|---|---|---|---|---|
| Soft Annealing | Heat | 820-860°C | Cool slowly in furnace | Max Brinell hardness of 280 |
| Hardening | 1st Pre-heating | 400°C | ||
| 2nd Pre-heating | 850°C | |||
| 3nd Pre-heating | 850°C and 1050°C | |||
| Harden | 1190-1300°C | Oil or air quenching, or warm bath at 550°C/air | ||
| Tempering | Temper | 540-570°C | At least 3 times | Hardness of 64-66 HR |
| Tempering °C | HRC |
|---|---|
| 200 | 63 |
| 300 | 61 |
| 400 | 61.5 |
| 500 | 63 |
| 525 | 65 |
| 550 | 65.5 |
| 600 | 63 |
| 700 | 47 |
Applications
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Tap drills
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Reamers
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Heavy duty milling cutters
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Dies
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Broach needles hexagon socket punches
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Piercing dies for nut production
Quality Assurance
Our M3 1.3344 steel undergoes rigorous testing and quality control to meet international standards, ensuring consistent performance and reliability. Certificates and test reports are available upon request. Feel free to reach out to us for more information on our M3 1.3344 steel products or to discuss your specific requirements. We're dedicated to providing top-quality steel solutions that meet your needs and exceed your expectations.
Manufacturing Range
| ROUNDS | SQUARES | ||
|---|---|---|---|
| SIZE (MM) | CONDITION | SIZE (MM) | CONDITION |
| 6.00 - 14.00 | CG | 7.2, 8.8, 10.5, 11 | HRA |
| 15.00 - 50.00 | HRAP | 13.5, 14, 17.5, 21 | HRA |
| 52.00 - 405.00 | FAT | 27, 32, 40 | HRA |
| 52.00 - 305.00 | FA |
Flats
| THICKNESS | WIDTH | CONDITION |
|---|---|---|
| 5.00 - 32.00 | 21.00 - 105.00 | HRA |
| 32.00 - 105.00 | 40.00 - 205.00 | FA |