CS70 Carbon Spring Steel


CS70 is a grade within BS1449. 

It is the equivalent to C67S and AISI /SAE 1070. 

Considered a high carbon steel is used in the manufacture of springs,In the annealed condition (normally 185 vpn max)  it can be pressed, formed etc. and is normally hardened and tempered after shaping operations. We hold stock from 0.20mm through to 3.25mm. Whilst we can supply single sheets our minimum quantity for strip in coil is 10 kilos

An alternative grade for light spring manufacturing, without the necessity to heat treat after forming is 301 spring temper stainless. BSS stock a wide range of 301. If you need more information call us.


Carbon0.65-0.75%Phosphorous0.045% max
Manganese0.50-0.90%Sulphur0.045% max

Our Range

Stock sheets available for next day despatch
  • 150mm x 0.25 x 1000mm
  • 355mm x 0.30 x 1000mm
  • 325mm x 0.40 x 1000mm
  • 300mm x 0.40 x 2000mm
  • 310mm x 0.50 x 1000mm
  • 330mm x 0.50 x 2000mm
  • 300mm x 0.71 x 2000mm
  • 300mm x 0.80 x 2000mm
  • 300mm x 0.90 x 1000mm
  • 300mm x 1.00 x 1000mm
  • 330mm x 1.20 x 1000mm
  • 300mm x 1.20 x 2000mm
  • 300mm x 1.50 x 2000mm
  • 300mm x 1.60 x 2000mm
  • 215mm x 1.80 x 1000mm
  • 320mm x 2.03 x 1200mm
  • 320mm x 2.03 x 2438mm
  • 300mm x 2.50 x 2000mm
  • 310mm x 2.64 x 2000mm
  • 300mm x 3.00 x 2000mm
  • 300mm x 3.25 x 2438mm
  • 300mm x 3.25 x 1220mm
  • 1220mm x 4.00 x 1220mm HS pickled annealed *
  • 1600mm x 6.00 x 1600mm HS pickled annealed *

Thicker material available in C75 hot rolled pickled and oiled up to 8.30mm. Call for availability.

We can also supply CS70 slit from coil

* 7/10 days delivery