STANDARD STEEL GRADES FOR SPRINGS

We have a wide range of spring grades, all from simple to high demanding applications. Thanks to our tight chemistries we supply equal properties delivery after delivery.

See our product leaflet for spring wire rod where we show some of our standard grades. We can also supply customized grades to your unique requirements:

Wire rod, Spring

OPTIMUM WIRE ROD FOR SPRINGS

To get best possible properties for spring wire rod, following parameters are important:

  • Tight chemistry for identical properties
  • Mechanical properties and deformation hardening
  • Corrosion properties
  • Surfaces
  • Dimension tolerances 

CONDITIONS

  • Direct cooling (DK)                  ASTM 10-13
  • ”In line”-annealing (DST)         ASTM 5-8
  • Pit furnace (SG)                      ASTM 3-6

Our standard procedure is to supply wire rod in pickled condition.

DIMENSIONS

General information about our wire rod:

Standard
5 – 18 mm (.197” – .709”) in increments of 0.5 mm (.020”).
There are minimum order quantities (MOQ) for some dimensions.

Tolerance
5.0 – 10.0 mm (.197” – .394”)       +/-0.15 mm (+/-.006”)
>10.0 -18.0 mm (>.394” – .709”)     +/-0.20 mm (+/-.008”)

Ovality
 Max 60% of the total tolerance span.

Surface classes
Class 3 is the standard class which has a max defect depth of 0.10 mm (.004”) for dimensions < 10 mm (< .394”) and 1% of the diameter for dimensions > 10 mm (> .394”).

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