T15
Data verifiedT15 combines high carbon, about 5% vanadium and 5% cobalt on a 12% tungsten base — the wear-resistance flagship of the conventional T-series. It serves abrasive cutting and cold work where M4-class steels wear too fast.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 1.50–1.60 |
| Si | ≤0.40 |
| Mn | ≤0.40 |
| Cr | 3.75–5.00 |
| W | 11.75–13.00 |
| V | 4.50–5.50 |
| Co | 4.75–5.25 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Delivery condition | Annealed |
| Hardness (hardened) | 64–67 HRC |
| Density | 8.20 g/cm³ |
| Wear resistance | Extreme (5% vanadium + cobalt) |
Heat treatment
Preheat 850 °C; harden 1205–1230 °C; triple temper 540–560 °C.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.3202 |
| aisi | T15 |
| jis | SKH10 |
| gb | W12Cr4V5Co5 |
Compare side by side: T15 vs T1 · T15 vs M4
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Form tools, broaches, milling cutters for abrasive steels, cold work punches, powder-compaction tools.
Processing: Very difficult to grind; CBN essential. Often superseded by PM grades (which are T15-like chemistries made by powder metallurgy).
Need T15 from stock?
Steel.Wiki is sponsored by Shenzhen NewAsia Special Steel (Nasteel), a special-steel stockholder in Shenzhen stocking mold, tool and alloy steels with EN 10204 3.1 certification.
Ask for a quotationVisit NasteelSource: ASTM A600 / EN ISO 4957 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.