Spring steel with a precisely tailored yield strength

Unparalleled elasticity

Our high-performance spring steels are used in applications requiring parts capable of reliably absorbing and re-exerting force. A good example of such applications are the spring diaphragms found in automobiles or the retractor springs in seat belt systems, which are tempered and re-rolled.

The elasticity of the spring steel plays an important role in the functionality of these dynamically highly loaded parts. It determines how much force the material is able to absorb without being permanently deformed. The yield strength represents the maximum force which the material can absorb and subsequently release while still returning to its original shape.

Perfectly tailored yield strength

Yield strength is an important parameter which we are capable of calibrating to a precise degree thanks to our experience combining chemical composition, cold rolling and heat treatment. When it comes to spring steels, we are able to manufacture various high-performance materials with yield strengths (Rp0.2) of up to 2,800 MPa (406 ksi).

Our products withstand countless millions of loading and unloading cycles over the course of their service lives. In several cases, such as those described above, these parts perform safety-related functions. Get in touch with us to discuss exactly what you need. We will manufacture a customized spring steel to perfectly meet your project requirements.

Spring steels – EN 10132-4

Standard Annealed to spherodized cementite Annealed to spherodized cementite-dead soft
Material-No. AISI JIS EN Yield strength
[MPa]
(max.)
Tensile strength
[MPa]
(max.)
HBW
(max.)
Yield strength
[MPa]
(max.)
Tensile strengt
[MPa]
(max.)
HBW
(max.)
1.1231 1070 SK7 C67S 380 580 180 330 550 171
1.1248 1075 SK6 C75S 400 610 189 345 570 177
1.1269 1086 SK5 C85S 405 620 192 355 580 180
1.1217 C90S 420 630 195 365 590 183
1.1274 1095 SK4
SK3
C100S 430 640 198 380 600 186
1.1224 C125S 440 650 202 400 620 192
1.2002 SK2 125Cr2 450 660 205 385 640 198
1.2235 80CrV2 390 600 186 345 570 177
1.5026 9255 56Si7 420 620 192 360 580 180
1.5634 75Ni8 450 660 205 400 630 195
1.8159 6150 SUP10 51CrV4 380 580 180 330 550 171
1.8161 58CrV4 390 590 183 350 560 174

You have any questions concerning our steel materials or would like to send us an e-mail?