CK45 / C45 / AISI 1045 medium carbon steel round bar.

CK45 (EN 1.1191) is widely used for mechanical components that need strength, wear resistance, and practical post-processing.

CK45 / C45 / AISI 1045 medium carbon steel round bar.

Choose the CK45 / 1045 route by machining, rod use, and inspection needs

CK45 / C45 / AISI 1045 should be reviewed as a medium-carbon steel route for machinability, rod preparation, straightness, surface condition, delivery condition, and certificate requirements.

  • State whether CK45, C45, AISI 1045, or another standard controls the order
  • Review hot rolled, normalized, annealed, peeled, turned, or ground routes separately
  • Connect hydraulic rods, shafts, gears, and mechanical parts to surface and tolerance needs
  • Confirm inspection, MTC, traceability, packing, destination, and drawings during RFQ review

CK45, C45, AISI 1045, S45C, and 45# cross-reference grades

State the required standard first, then list acceptable equivalents so the medium carbon steel route, machining expectation, and inspection wording are not confused during supplier review.

  • EN C45 / 1.1191
  • AISI 1045
  • JIS S45C
  • GB 45#

CK45 / 1045 delivery condition and machining route

Buyers should clarify whether the order is hot rolled, normalized, annealed, black, peeled, ground, cut to length, or machined, because the route affects downstream turning and finishing.

  • Hot rolled / normalized / annealed condition
  • Black, peeled, ground, or machined surface route
  • Cut-to-length or machining allowance if required
  • Hardness or mechanical target if specified

CK45 / 1045 applications for shafts, rods, gears, bolts, and machined parts

CK45 / 1045 is commonly reviewed when buyers need practical machinability, medium carbon steel strength, wear resistance, and processing flexibility for general mechanical components.

  • Machine shafts and general shafts
  • Cylinder rods and guide rods
  • Gears, bolts, and studs
  • General machinery and automotive parts

Inspection and RFQ details for CK45 / 1045 round bar

Before quotation, state standard, size, quantity, delivery condition, surface route, machining needs, application, MTC requirement, dimensional inspection, packing, and destination.

  • Chemical composition and mechanical testing if required
  • Dimensional and surface condition review
  • MTC and traceability requirement
  • Packing, destination, and drawings when available

Production route

Start with a likely route

Use this page as a starting point. Load the route, then adjust each selection to match your order.

Starting point only. The exact route depends on grade, dimensions, application, specification, and order requirements.

  1. 01
    Heat treatmentReview during RFQ
  2. 02
    Surface processingPeeled or turned
  3. 03
    InspectionOrder-specific standard checks
  4. 04
    PackingExport protection and marking
Load this route

CK45 / 1045 buyer questions before RFQ

What is CK45 / C45 / AISI 1045 round bar used for?

CK45 / C45 / AISI 1045 round bar is commonly reviewed for shafts, gears, bolts, studs, cylinder rods, machined blanks, and general machinery parts where medium carbon steel and practical machining are suitable.

When should buyers compare CK45 / 1045 with 42CrMo4?

Compare CK45 / 1045 with 42CrMo4 when the part may need either a medium carbon steel route or a higher-strength Cr-Mo alloy route. Load, surface condition, heat treatment, and inspection needs should guide the review.

What should buyers send for CK45 / 1045 quotation review?

Send grade standard, acceptable equivalent names, diameter, length, quantity, delivery condition, surface route, machining allowance if required, application, inspection documents, packing, and destination.

CK45 / 1045 quotation questions

Are CK45, C45, AISI 1045, S45C, and 45# interchangeable?

They are commonly discussed as medium carbon steel cross-reference names, but buyers should state the required project standard first. Chemistry, condition, mechanical targets, and inspection requirements should still be reviewed by order.

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.

CK45 / C45 / AISI 1045 standards, machinability, delivery condition, and inspection points.

Review common cross-reference grades, chemical and mechanical data, normal delivery conditions, typical machine-part uses, and RFQ requirements.

Grade focusCK45 / 1045
Key pointGood machinability for general machine parts.
Suitable useCommonly chosen when the buyer wants a practical round bar for turning and finishing.
Review focusPractical carbon steel for everyday industrial machining.

CK45 / 1045 cross-reference grades

Cross-reference grades must be confirmed against the required project standard before quotation.

EN
C45 / 1.1191
ASTM
AISI 1045
DIN
CK45
JIS
S45C
GB
45#

CK45 / 1045 chemical composition

C
0.42 - 0.50
Si
0.17 - 0.37
Mn
0.50 - 0.80

CK45 / 1045 mechanical properties

Tensile strength
≥ 600 MPa
Yield strength
≥ 355 MPa
Elongation
≥ 16%

CK45 / 1045 supply specifications

Form
Round bar
Diameter
20 - 350 mm
Length
3 - 12 m
Condition
Hot rolled / Normalized / Annealed
Machine shafts
Gears
Bolts and studs
Automotive components
Note
General machinery parts

CK45 / 1045 manufacturing options

  • Hot rolled or normalized supply
  • Rough machining support

CK45 / 1045 procurement summary

  • Practical carbon steel for everyday industrial machining.
  • The clean version below keeps the sourcing details buyers actually use in first-round technical review.
Detailed RFQ guidanceOpen details

CK45 / 1045 technical overview

  • CK45 (EN 1.1191) / C45 / AISI 1045 is a medium carbon steel widely used for mechanical components requiring good strength and wear resistance. The material offers good machinability and can be heat treated to improve mechanical properties.

CK45 / 1045 chemical composition

Mechanical testing
Dimensional inspection
Surface condition review
Need CK45 / 1045 round bar quotation review?
Note
Tell us the size, quantity, and application and we will reply with a practical supply option.

Send a CK45 / C45 / AISI 1045 round bar requirement for review.

Include diameter, length, quantity, condition, machining needs, application, inspection requirements, and destination.

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