DIN 17222 C67 1.0603 Cold Rolled Steel Strips for Springs

Cold rolled steel strip for springs is distinguished by high dimensional accuracy and good surface quality and, in the cold rolled + hardened + tempered condition (H + A) offers the possibility of achieving high values of hardness, tensile strength and elastic limit.

C67 1.0603 Introduce

C67 1.0603 steel is an unalloyed medium carbon engineering steel which has 0.65%-0.72% Carbon. C67 steel with low hardening capacity designed for less loaded springs, periodically working for oil hardening.

C67 1.0603 Dimensions and permissible deviations

Thickness: 0.1 to 4mm; Tolerances: +/- 0.008 to 0.11 mm

Width: 10 to 600mm; Tolerances: +/- 0.15 to 0.60mm

C67 1.0603 Equivalent Grade

C67 1.0603 Chemical composition

C67 1.0603 Treatment condition on delivery

Cold rolled + soft annealed : G

Cold rolled + hardened + tempered : H + A

C67 1.0603 Mechanical properties in the cold rolled + soft annealed condition G

C67 1.0603 Tensile strength in the cold rolled + hardened + tempered condition (H + A)

C67 1.0603 Vickers hardness in the cold rolled + hardened + tempered condition (H + A)

C67 1.0603 Surface condition

Strip to be supplied in the

1 cold rolled + soft annealed G or

2 cold rolled + soft annealed + cold rolled (G + K) condition

must have a bright, metallically clean surface.

Cold rolled + hardened + tempered (H + A) strip is supplied, as agreed at the time of ordering, with

1 grey-blue (GR),

2 bright (8K),

3 polished (P) or

4 polished and colour-tempered (P & AF) surface.

C67 1.0603 Types of heat treatment

Approximate values for heat treatment and minimum hardness values in the hardened condition of cold rolled steel strips for springs

C67 1.0603 Acceptance testing and test certificates

EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.