Chemical Composition
The chemical composition of T15 tool steels is outlined in the following table.
| Element | Content (%) |
|---|---|
| Tungsten, W | 11.75-13 |
| Cobalt, Co | 4.75-5.25 |
| Vanadium, V | 4.50-5.25 |
| Chromium, Cr | 3.75-5 |
| Carbon, C | 1.50-1.60 |
| Molybdenum, Mo | 1 (max) |
| Nickel, Ni | 0.3 |
| Copper, Cu | 0.25 |
| Manganese, Mn | 0.15-0.40 |
| Silicon, Si | 0.15-0.40 |
| Phosphorus, P | 0.03 |
| Sulfur, S | 0.03 |
Physical Properties
The table below shows the physical properties of T15 tool steels.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 8.19 g/cm3 | 0.295 lb/in3 |
Mechanical Properties
The mechanical properties of T15 tool steels are displayed in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Elastic modulus | 190-210 GPa | 27557-30457 Ksi |
| Izod impact unnotched | 27.1 – 46.1 J | 20.0 – 34.0 ft.lb |
| Abrasion (loss in mm3, tempered at 1025°F; ASTM G65 ) | 8 | 8 |
| Abrasion (loss in mm3, tempered at 1275°F; ASTM G65 ) | 32.3 | 32.3 |
| Hardness, Rockwell C (tempered at 1275°F) | 46.5 | 46.5 |
| Hardness, Rockwell C (tempered at 1025°F) | 67.5 | 67.5 |
Thermal Properties
The table below outlines the thermal properties of T15 tool steels.
| Properties | Conditions | ||
|---|---|---|---|
| T (ºC) | Treatment | ||
| Thermal expansion | 9.9 x 10-6/ºC | 20-200 | – |
| Thermal conductivity | 20.9 x W/m-K | 100 | – |
