1.2083
Data verified1.2083 is a martensitic stainless mold steel (420 type) combining corrosion resistance with high polishability. It is the default choice for molds running corrosive plastics such as PVC, and for medical and food-contact tooling.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.36–0.42 |
| Si | ≤1.00 |
| Mn | ≤1.00 |
| Cr | 12.50–14.50 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Delivery condition | Annealed |
| Hardness (hardened) | 48–54 HRC |
| Density | 7.70 g/cm³ |
| Corrosion resistance | Good (stainless) |
Heat treatment
Anneal 750–800 °C; harden 1000–1050 °C oil/air; temper 200–300 °C for 50+ HRC.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.2083 |
| aisi | 420 |
| jis | SUS420J2 |
| gb | 4Cr13 |
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: PVC and corrosive-plastic molds, medical/food molds, optical and high-gloss tooling, cavity inserts.
Processing: Mirror polishable in ESR quality; machinability moderate; avoid decarburization during hardening — vacuum hardening preferred.
FAQ
- 1.2083 vs S136?
- S136 is Uddeholm’s brand for a 420-type ESR mold steel of the same family as 1.2083; ESR remelted 1.2083 is the comparable generic grade.
- What hardness does 1.2083 reach?
- Typically 48–54 HRC after hardening at 1000–1050 °C and low-temperature tempering.
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Ask for a quotationVisit NasteelSource: DIN / EN published grade ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.