C85S
1.1269Highest-carbon unalloyed spring strip steel — C 0.83-0.90%. Maximum achievable hardness (HRC 62-65) and fatigue strength in the cold-rolled spring strip series. Used for the most demanding flat spring applications where maximum hardness is critical: saw blades, scraper blades, precision springs, and high-frequency reed valves. Higher C than C67S (0.65-0.72%) and C75S (0.70-0.80%).
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI 1085 (approximate) | — | REF |
| 🇪🇺 | EN | Europe | C85S / 1.1269 | 1.1269 | 100% |
Sources: ASTM A29, EN 10132-4
Chemical composition comparison (wt%)
Side-by-side: C85S (EN 10132-4) vs C85S / 1.1269 (EN) (EN 10132-4)
| Element | C85S (EN 10132-4) | C85S / 1.1269 (EN) | Overlap |
|---|---|---|---|
| C | — | 0.83–0.9% | — |
| Si | — | 0.15–0.35% | — |
Mechanical properties
Compatibility verdict
C85S and C85S / 1.1269: 100% composition match
Related materials
C45
1.0503Medium carbon unalloyed quality steel. Good machinability and moderate strength after heat treatment. Widely used for shafts, spindles, pins, studs, and general machine parts.
S355JR
1.0045High-strength low-alloy structural steel with minimum yield strength of 355 MPa. Standard grade for bridges, buildings, cranes, and general structural applications. Impact tested at +20°C (JR).
S235JR
1.0038General-purpose structural steel with minimum yield strength of 235 MPa. The most common structural steel grade in Europe for general construction, frames, and non-critical structural applications.
Export this comparison as PDF
Professional datasheet with equivalents, composition, and properties. Ready for your QM documentation.
Download PDF — €4.90Included with PRO subscription