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C45 (CK45) Annealed Spring Steel

C45 (CK45)

C45 (CK45) Annealed Spring Steel

The C45 material, produced in cold-rolled and annealed forms, is generally supplied in two mechanical property ranges: annealed and tempered.

The untreated material is referred to as annealed, while the heat-treated material is referred to as tempered. Previously known as C45 Grade Spring Steel under German DIN standards, this material was redefined as CK45 Grade Spring Steel under the European Norm while maintaining the same technical specifications.

Technical Specifications of CK45 Grade Annealed Spring Steel

CK45 Grade Annealed Spring Steel is produced in cold-rolled form according to the EN 10132-3 standard and is identified under work number 1.1191. It is typically supplied in its annealed form and can also be used in its tempered form after heat treatment by users in their processes.

Our company supplies this material in slit coil or strip steel form, both in annealed and tempered variants, according to your specifications.

Applications of CK45 Grade Annealed Spring Steel

CK45 Grade Annealed Spring Steel is widely used in automotive, white goods, electronics, and construction industries.

Standard Comparison

EN 10132 UNI DIN AFNOR BS SAE/AISI
C45E C45 CK45 XC45 CS45 1045

Chemical Compositions %

C Mn Si P max. S max. Cr max. Ni max. Mo max. V
0,42-0,50 0,50-0,80 0,40 0,035 0,035 0,40 0,40 0,10 --

Mechanical Properties

Rm max N/mm² HV max. A% (Lo80 min)
570 165 18

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