Standard map
Common cross-references
- Legacy DIN
- CK45
- EN
- C45E / 1.1191
- EN
- C45 / 1.0503
- SAE/AISI
- 1045
- JIS
- S45C
- GB
- 45
Grade route 03
CK45 / C45 / AISI 1045round bar
CK45, C45E, C45, and SAE/AISI 1045 are medium-carbon steel designation routes often compared for mechanical parts; the controlling standard still governs the order.
Grade specifications
Confirm the grade and condition before comparing prices.
Cross-references are a starting point. The drawing standard, condition, size and inspection scope define the order.
- 01GradeCK45 / 1045
- 02StandardConfirm standard and edition
- 03ConditionHot rolled / Normalized / Annealed
- 04PartHydraulic rods
- 05ReleaseHeat identity and chemical verification
Supply window
Published specification
- Form
- Round bar
- Diameter
- 20 - 350 mm
- Length
- 3 - 12 m
- Condition
- Hot rolled / Normalized / Annealed
Property reference
Mechanical route
- Property route
- State the product standard, condition, diameter, and required property target
- Test basis
- State the test position, sampling plan, and required result document
Chemistry reference
- Composition basis
- Use the chemistry table for the named CK45, C45E, C45, or SAE 1045 route
- Substitution check
- Compare the full tables before approving S45C or GB 45
Matched components
Connect the material to the part.
Application and release
Key details for your order.
- Machine shafts
- Gears
- Bolts and studs
- Automotive components
- General machinery parts
- Heat identity and chemical verification
- Mechanical properties for the ordered condition
- Dimensions, surface condition and agreed inspection documents
RFQ checks
Questions buyers ask first.
Are CK45, C45, AISI 1045, S45C, and 45# interchangeable?
No. They are related medium-carbon steel designations, but they are not automatically interchangeable. State the controlling standard and edition, then review chemistry, product form, condition, dimensions, testing, and any alternative through written purchaser approval.
Is CK45 / 1045 suitable for hydraulic cylinder rods?
CK45 / 1045 can be reviewed for some cylinder rod routes when strength, straightness, surface condition, machining, and inspection requirements are suitable. Higher-load or fatigue-sensitive routes may require comparison with alloy grades.
Which delivery conditions should CK45 / 1045 buyers specify?
Buyers should specify hot rolled, normalized, annealed, black, peeled, ground, machined, or cut-to-length route where relevant. Add hardness, mechanical-property, tolerance, and surface-condition requirements if they affect the final part.
Technical references
Go deeper only where needed.
Grade RFQConfirm the standard before quotation.
Send the grade standard, size, quantity, condition, application, inspection documents and destination.