1.2550
Data verified1.2550 (60WCrV7) is the European tungsten shock-resisting tool steel, the close counterpart of AISI S1. It is a staple for chisels, punches and shear blades across European shops.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.55–0.65 |
| Si | 0.50–0.80 |
| Mn | 0.15–0.45 |
| Cr | 0.90–1.20 |
| W | 1.80–2.10 |
| V | 0.10–0.20 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Delivery condition | Annealed |
| Hardness (hardened) | 50–58 HRC |
| Density | 7.85 g/cm³ |
| Toughness | High (shock-resisting class) |
Heat treatment
Harden 860–900 °C oil; temper 200–450 °C by impact duty.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.2550 |
| aisi | S1 (close) |
| gb | 6CrW2Si (near) |
Compare side by side: 1.2550 vs S1 · 1.2550 vs S7
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Chisels, punches, rivet sets, shear blades, pneumatic tool bits, blanking tools for thick stock.
Processing: Forgiving oil hardening with deep hardenability; silicon content aids tempering resistance.
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Ask for a quotationVisit NasteelSource: 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.