AISI 1045 / C45 Medium Kohlenstoffstahl: Properties & Heat Treatment
ASTM A29 / EN 10083-2 · Published: 2026-05-24 · Updated: July 2026
AISI 1045 (C45) is a medium-carbon steel with 0.43-0.50% carbon content, offering higher strength and hardness than mild steels while retaining reasonable machinability. Widely used for shafts, gears, axles, bolts, and studs requiring moderate...
AISI 1045 (C45) ist ein medium-carbon steel mit 0.43-0.50% carbon content, offering higher strength und hardness als mild steels while retaining reasonable machinability. Widely used für shafts, gears, axles, bolts, und studs requiring moderate wear widerstand. In der normalized condition, es machines well bei 170-210 HB. Durch-hardening durch quenching in wasser oder öl und tempering yields 28-35 HRC für allgemein engineering verwenden. Induction hardening können produce surface hardness von 55-60 HRC für localized wear widerstand ohne affecting core toughness.
Quick Facts
| Kategorie | Kohlenstoffstahl |
| Norm | ASTM A29 / EN 10083-2 |
| Density | 7.85 g/cm³ |
| Yield Strength | 450 MPa (65 ksi) Q&T |
| Tensile Strength | 630 MPa (91 ksi) Q&T |
Global Equivalents & Cross-Reference
| Alternative Norm / Güte | Action |
|---|---|
| EN C45 | Compare |
| DIN 1.0503 | Compare |
| JIS S45C | Compare |
| GB 45 | Compare |
| ISO C45E4 | Compare |
Verwandt Materials
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Frequently Asked Questions
Können C45 steel sein welded?
C45 hat limited weldability due zu sein higher carbon content, welche increases hardenability und cracking risk in der HAZ. Wenn welding ist notwendig, preheat zu 200-300°C, verwenden niedrig-hydrogen electrodes, maintain interpass temperature, und post-weld stress-relieve bei 550-650°C. C45 ist generally nicht recommended für kritisch welded structures—consider 4140 oder 4340 für weldable medium-carbon applications.
References & International Standards
- ASTM International. Norm Specifications für Stahl & Metal Alloys. astm.org
- International Organization für Standardization (ISO). Metallic Materials — Cross-Referenz Database. iso.org
- American Iron und Stahl Institute (AISI). Stahl Güte Designations & Equivalents. steel.org
- European Committee für Standardization (CEN). EN Stahl Standards & Numbering System. cencenelec.eu