T4 Steels Tool
T4 Steels is proud to produce and offer T4 (1.3255) - AISI T4 tool steel is one of tungsten type high speed tool steel, which belongs to ASTM A600 specification, the standard for high speed tool steel materials. ASTM T4 tool steel is similar to T1 Tool Steel materials, but with 4.25~5.75% cobalt added to increase heat resistance. The red hardness of T4 steel and the high temperature hardness is a little higher than T1 tool steel. AISI T4 tool steel is a deep hardening alloy capable of Rockwell C 64 hardness.
Steel Properties
- High duty High-Speed-Steel on tungsten base.
- Deep hardening response
- Good toughness and cutting capability
Applications
- Cutting tools
- Broaches and Cold extrusion punches
- Turning
- Planing and Milling cutters for roughing work
- Grey cast iron
- Chill castings NF metals & non-metal material
Quality Assurance
Our T4 1.3255 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 T4 1.3255 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.
| Element | Value (%) |
|---|---|
| C | 0.81 |
| Cr | 4.30 |
| Mo | 0.65 |
| W | 18.00 |
| Co | 4.80 |
| V | 1.50 |
| Property | Value |
|---|---|
| Hardness (HB) | 265 max (Annealed) |
| Quenching and Tempering Hardness (HRC) | 64 – 65 |
| Poisson's ratio | 0.27 – 0.30 |
| Property | Value |
|---|---|
| Density (g/cm³) | 8.7 |
| Temperature (°C) | kN/mm² |
|---|---|
| 20 | 217 |
| Temperature (°C) | Coefficient (10⁻⁶/°C) |
|---|---|
| 500 | 11.3 |
| 600 | 11.4 |
| Temperature (°C) | Conductivity (W/m·K) |
|---|---|
| 20 | 19 |
| Process | Temperature (°C) / details | Additional info |
|---|---|---|
| Soft Annealing | 820–850°C | slow cool to 550°C, then air cool · Max Brinell hardness 265 |
| Stress Relieving | 600–650°C | hold 1 hour, air cool · removes machining stresses |
| Hardening | 1260–1290°C | quench in oil, air, or 550°C bath · hardness after quench 63–66 HRC |
| Tempering | 560–580°C (2x) | hardness after tempering 64–65 HRC |
| Tempering °C | HRC |
|---|---|
| 100 | 65 |
| 200 | 63 |
| 250 | 62 |
| 300 | 61.5 |
| 400 | 62.5 |
| 500 | 65 |
| 550 | 65.5 |
| 600 | 63 |
| 650 | 55 |
⚡ Steel Weight Calculator
Precision Weight Calculator for Steel Sections