EN C45 (1.0503): Medium Carbon Steel for Shafts and Gears
EN 10083-2 · Published: 2026-06-03 · Updated: 2026-06-03
EN C45 is a medium carbon steel containing approximately 0.45% carbon, widely used for shafts, axles, gears, and bolts. In the normalized condition it machines well; after quenching and tempering it achieves high strength and hardness suitable...
EN C45 is a medium carbon steel containing approximately 0.45% carbon, widely used for shafts, axles, gears, and bolts. In the normalized condition it machines well; after quenching and tempering it achieves high strength and hardness suitable for wear-resistant components.
Quick Facts
| Category | Carbon Steel |
| Standard | EN 10083-2 |
| Density | 7.85 g/cm³ |
| Yield Strength | 370 MPa (normalized) |
| Tensile Strength | 630-780 MPa (quenched+tempered) |
Global Equivalents & Cross-Reference
Related Materials
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Frequently Asked Questions
Can C45 be welded?
C45 has limited weldability due to its carbon content. Preheating to 200-300°C is required, and post-weld stress relief is recommended. For welded applications, consider C22 (0.22% C) or a low-alloy alternative.
References & International Standards
- ASTM International. Standard Specifications for Steel & Metal Alloys. astm.org
- International Organization for Standardization (ISO). Metallic Materials — Cross-Reference Database. iso.org
- American Iron and Steel Institute (AISI). Steel Grade Designations & Equivalents. steel.org
- European Committee for Standardization (CEN). EN Steel Standards & Numbering System. cencenelec.eu