C50
1.0540Medium-high carbon unalloyed steel between C45 and C55. Good strength and wear resistance after QT. Used for springs, axles, shafts, coupling parts, and machine components where moderate hardness is sufficient without alloy steel cost.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI 1050 | G10500 | REF |
| 🇪🇺 | EN | Europe | C50 | 1.0540 | 100% |
Sources: ASTM A29, EN 10083-2:2006
Chemical composition comparison (wt%)
Side-by-side: C50 (EN 10083-2) vs C50 (EN) (EN 10083-2:2006)
| Element | C50 (EN 10083-2) | C50 (EN) | Overlap |
|---|---|---|---|
| C | — | 0.47–0.55% | — |
| Si | — | 0–0.4% | — |
Mechanical properties
Compatibility verdict
C50 and C50: 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.
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