Toolman Special Steels is proud to produce and offer T1 (1.3355) - one of the original tungsten high speed steels, although all tungsten steel grades are used to a limited extent because of the cost and questionable availability of tungsten. T1 high speed steel is an air or oil hardening tool steel which has good comprehensive performance. The material exhibits excellent wear resistance and resistance to softening. It also offers good toughness, effective cutting performance, and a strong response to deep hardening.
Steel Properties
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Tungsten high - speed tool steel
Very high resistance to wear and to softening
Good toughness and cutting capability
Deep hardening response
Chemical Composition
| Element | Value |
|---|---|
| C | 0.75 |
| Cr | 4.10 |
| Mo | - |
| W | 18.00 |
| Co | - |
| V | 1.10 |
Mechanical Properties
| Property | Value |
|---|---|
| Hardness (HBW) | 230 - 300 (Annealed) |
| Quenching and Tempering Hardness (HRC) | 62-66 |
Physical Properties
| Property | Value |
|---|---|
| Density (g/cm³) | 8.7 |
Modulus of Elasticity
| Temperature (°C) | kN/mm² |
|---|---|
| 20 | 217 |
Thermal Properties
| Temperature (℃) | Thermal Expansion Coefficient (10^-6/°C) |
|---|---|
| 500 | 11.8 |
| 600 | 12 |
Thermal Conductivity
| Temperature (℃) | Thermal Conductivity (W/m•K) |
|---|---|
| 20 | 19 |
HEAT TREATMENT AND PROCESSES
Heat treatment
| Process | Temperature (°C) | Procedure Details | Cooling Method |
|---|---|---|---|
| Soft Annealing | 850-900 | Heat to 850 - 900°C | Cool slowly in furnace to about 700°C, then air cool |
| Stress Relieving | 600-700 | Heat to 600-700°C, hold for 2 hours | Cool in still air |
| Hardening | 2nd Step: 850-900 | Heat to 1210-1240°C for high hardness, 1190-1210°C for toughness | |
| Tempering | 540-620 | Heat to 540-620°C, hold for at least 2 hours per 25 mm thickness, usually triple tempering | Cool in still air |
Applications
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Turning
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Planing and Slotting Tools
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Taps
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Spiral Drills
Threading Dies
Profile Cutting Tools
Broaching tools
Reamers
Quality Assurance
Our T1 1.3355 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 T1 1.3355 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 |