C45 / CK45 / SAE 1045 Carbon Steel
C45 / CK45 / SAE 1045 Carbon Steel is supplied for mechanical engineering and serial production applications where the grade, delivery condition, dimensional tolerance and traceability must be specified together. Erkal Haddecilik supplies cut-to-length steel from Bursa subject to stock.
C45 / 1.0503 is a separate grade record. The historical DIN designation Ck45 is associated with C45E / 1.1191. SAE 1045 is an indicative international comparison, not automatic interchangeability. Verify chemistry, P/S limits, product standard, section and delivery condition. Lucefin C45E (rev. 2024)
Key properties
- C45 and C45E are distinct grades; historical Ck45 refers to C45E.
- SAE 1045 is a conditional comparison, not an automatic substitute.
Typical applications
- Shafts and axles selected against loading and delivery condition.
- Machine parts whose required hardness and heat treatment are specified.
C45 — producer EN reference composition
| Element | Range |
|---|---|
| C | 0,42–0,50 % |
| Si | 0,10–0,40 % |
| Mn | 0,50–0,80 % |
| P | ≤0,045 % |
| S | ≤0,045 % |
This table summarizes the EN reference row for C45 in the Ovako datasheet. It is not an acceptance table for other standard names mentioned on this page. Specify the complete standard and check the delivery certificate.
Values may vary by product standard or variant; the material certificate is the basis for purchasing specifications.
Heat treatment guide
| Process | Temperature | Note |
|---|---|---|
| Normalizing | approximately 840–870 °C | Air cooling |
| Hardening | depending on the application | Water/oil selection depends on the process |
| Tempering | according to target hardness | According to section and mechanical requirements |
Heat treatment values are indicative; the process specification must be established separately for the part section, furnace, cooling medium and target mechanical properties.
Technical selection note
Steel grades must not be considered exact equivalents based on similar names alone. Chemical composition, mechanical properties, product standard, delivery condition and heat treatment requirements must be verified against the certificate.
Frequently Asked Questions
Technical selection note
Material equivalence, mechanical properties and heat treatment must be verified against the applicable standard and material certificate before critical use.