Small Quantities of Spring Steel Strip

Having recognised a “gap” in the steel supply market BSS Steelstrip is now able to offer small quantities of spring steel strip from stock.Whilst steel mills regularly insist on minimum order quantities of up to 5 tons, and stockholders upwards of a ton, we have recognised the need of smaller engineering companies who may require as little as a single sheet to complete a project, or to replace a part in an ageing piece of plant.

It can be frustrating and time consuming for an engineer to spend hours on the telephone trying to source small quantities of spring steel, only to find the supplier loses interest the moment he realises the small quantity involved. To be honest it’s as a big a problem often for the supplier as for the customer! Not for us!

Here at BSS we won’t turn you away, we are pleased to hear from you and pleased to help. We can supply from 1 sheet to half a ton. Just email us your enquiry; we will make our best offer. Material is delivered worldwide by TNT with “online tracking”, and to make the process even easier you can pay by credit card!

Sourcing small quantities of spring steel need not be a “painful” experience call us on 01709 820070 or email us today atbss@steelstrip.co.uk


We stock three basic grades of spring steel in the soft condition (annealed), which can be formed prior to heat treatment or ready hardened material (hardened and tempered), which is more suitable for flat springs, blades etc.
Grade Carbon Manganese Silicon S P Condition hardness Range * Thickness
CS70 0.65/0.75 0.50/0.90 0.05/0.35 0.030 max 0.030max Annealed Normally 185 vpn max .0.030/3.25mm
CS80 0.75/0.85 0.50/0.90 0.05/0.35 0.030 max 0.030max Hardened 430-490 vpn 0.025/3.25mm
CS95 0.90/1.00 0.30/0.60 0.05/0.35 0.030 max 0.030max Hardened 530-625 vpn 0.05/1.63mm
* The hardness ranges are for guidance only as the hardness’s vary according to thickness . you can find a hardness conversion chart here.

In addition to carbon spring steels we hold stock of stainless temper rolled spring steels in type 301 and 420 hardened and tempered.

Type 301 has a good corrosion resistance due to a content of 17 % Chromium and 7 % Nickel. A high tensile strength is obtained by cold rolling. Compared to Alloy 1.4301 (AISI 304) a much higher tensile strength of more than 2000 N/mm² can be reached. Because of this, 1.4310 is suitable for stainless feeler gauge stock, precision foils, stainless springs and parts of higher strength. This alloy is little magnetic and can not be held by magnetic tables of grinding machines.

Grade 420 stainless steel is a higher carbon version of 410; like most non-stainless steels it can be hardened by heat treatment. It contains a minimum of 12 per cent chromium, just sufficient to give corrosion resistance properties. It has good ductility in the annealed condition but is capable of being hardened up to Rockwell Hardness 50HRC, the highest hardness of the 12 per cent chromium grades. Its best corrosion resistance is achieved when the metal is hardened and surface ground or polished.

Grade Carbon Manganese Silicon S P Cr Ni Hardness Thickness
Type 301 0.15 max 2.00 max 0.75 max 0.030 max 0.030max 16.0/18.0 6.0/8.0 .0.01/3.00mm
420 S37 0.15 min 1.00 max 1.00 max 0.030 max 0.030max 12.0/14.00 48/52 RC 0.50/3.00mm