Chinese stainless spring steel wires was start to use from military products. in the 1960s, we used the spring steel wire introduced from Soviet union; in the 1970s we began to promote the one of English BS S205 standard; in the 1980s, stainless spring steel wire transits from military to civilian goods. By 2000, the batch export of hardware and daily chemical products drives the breed diversification of stainless spring steel wire. At present some stainless spring steel wire in the market are with Chinese characteristics.
Because spring steel wire is delivered with a relatively high tensile strength and through cold-drawn, the carbon and nitrogen are key elements determine the cold pulling strengthen ratem, so we must control the nitrogen and nitrogen. China stainless spring steel wire gradescan meet the requirement of domestic industries.
Stainless spring steel wire's most important technical indicators is tensile strength is the. The stainless steel spring wire can be divided into A, B, C, D, E and F six categories according to the acceptable range of tensile strength. According to the characteristics and usage of various grades, A is suitable for making the spring which stress is low, shape is complex or is high demand for the fatigue life; Group B used for making the spring which stress is higher, shape is relativesimple; Group C's corrosion is same to A, B group, but its anti-fatigue performance is better than the formers; Group D spring steel wire's tensile strength is slightly lower than group A, some of which is widely used in aerospace. E and F group , compared with A, B, C, D, E, spring steel wires’ corrosion resistance is bit poor, but with the strength is higher than the former.