1.2085 - X33CrS16
| Delivery condition | Description | Hardness |
|---|---|---|
| +A | Soft annealed – only exceptionally available | approx. 200 HB |
| +QT | Quenched and tempered / pre-hardened | approx. 30–35 HRC |
| +N | Nitrided – optional, for higher surface hardness | surface up to 950–1000 HV |
Material number: 1.2085
DIN designation: X33CrS16
According to EN ISO: EN ISO 4957 – cold work tool steel / mould steel
AISI / SAE equivalent: approx. 420F mod.
Steel type: Stainless pre-hardened mould steel with sulphur (S) content
🔩 Properties
Machinability: Good, due to sulphur content
Corrosion resistance: Increased, stainless steel
Polishability: Good
Dimensional stability: Good after heat treatment
⚗️ Chemical composition
| Element | Content [%] |
|---|---|
| C | 0.30–0.36 |
| Cr | 15.5–16.5 |
| Mn | ≤ 1.0 |
| Si | ≤ 1.0 |
| S | 0.10–0.30 |
| Mo | ≤ 0.5 |
🔥 Typical heat treatment
| Process | Temperature (°C) | Medium / Procedure | Result / Purpose |
|---|---|---|---|
| Soft annealing | 740–800 | Slow cooling in furnace, approx. 10 °C/h | Hardness approx. 200 HB, improved machinability |
| Normalizing | 850–880 | Air cooling | Structure homogenization, stress relief |
| Quenching | 980–1050 | Air, oil or warm salt bath, 500–550 °C | Hardness after quenching approx. 50–54 HRC |
| Tempering | 180–300 | Air, 2–3 hours depending on thickness | Hardness after tempering 30–35 HRC, approx. 290–325 HB |
| Nitriding, optional | 480–520 | — | Surface hardness up to 900–1000 HV, increased wear resistance |
| Delivery condition +QT | — | Quenched and tempered | Ready for use, hardness 30–35 HRC |
⚙️ Notes
Steel 1.2085 is most commonly supplied in condition +QT, i.e. quenched and tempered, ready for immediate use.
If processed from the soft condition, slow annealing followed by quenching and tempering according to the table is recommended.
Nitriding is used to extend the service life of moulds and improve resistance to corrosion and wear.
