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DIN C45 / AISI 1045 Equivalent Grade
C45 Steel
C45 is a widely used medium carbon steel known for its good balance of strength, machinability, and wear resistance in normalized or heat-treated conditions. Equivalent to DIN 1.0503, AISI 1045, and JIS S45C, it is commonly selected for shafts, pins, bolts, couplings, axles, and general engineering parts that require more strength than low-carbon steels. C45 also responds well to induction hardening and flame hardening where improved surface durability is required.
Key Features
- Higher strength than low-carbon engineering steels
- Good machinability in normalized and annealed condition
- Suitable for induction and flame hardening
- Good wear resistance after surface hardening
- Cost-effective for general mechanical components
Main Applications
- Shafts, pins, and spindles
- Gears, couplings, and connecting parts
- Studs, bolts, and fasteners
- Axles, crank parts, and machine components
- General engineering and agricultural equipment parts
International Standards Comparison
| ASTM | SAE/AISI | EN Name | JIS | IS |
|---|---|---|---|---|
| A29 | 1045 | C45 / 1.0503 | S45C | 45C8 |
Chemical Composition (Typical Analysis in %)
| C | Si | Mn | P (max) | S (max) |
|---|---|---|---|---|
| 0.42-0.50 | 0.15-0.35 | 0.50-0.80 | 0.040 | 0.040 |
Material Properties
- Surface Hardening: Performs well under induction and flame hardening processes.
- Strength Balance: Offers a dependable balance of toughness, strength, and machinability.
- Heat Treatment: Responds well to normalization, tempering, and surface hardening cycles.