DIN 17222 67SiCr5 1.7103 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.

67SiCr5 1.7103 Introduce

67SiCr5 1.7103 steel is an alloyed medium carbon engineering steel which has 0.62%-0.72% Carbon and 0.4%-0.6% Cr. 67SiCr5 1.7103 is a Spring Steel which is manufactured in Rod, Bar and coil.

67SiCr5 1.7103 Equivalent Grade

67SiCr5 1.7103 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

67SiCr5 1.7103 Chemical composition

67SiCr5 1.7103 Treatment condition on delivery

Cold rolled + soft annealed : G

Cold rolled + hardened + tempered : H + A

67SiCr5 1.7103 Mechanical properties in the cold rolled + soft annealed condition G

67SiCr5 1.7103 Tensile strength in the cold rolled + hardened + tempered condition (H + A)

67SiCr5 1.7103 Vickers hardness in the cold rolled + hardened + tempered condition (H + A)

67SiCr5 1.7103 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.

67SiCr5 1.7103 Types of heat treatment

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

67SiCr5 1.7103 Acceptance testing and test certificates

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