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    Product Introduction
    51Si7 spring steel refers to the special alloy steel for making all kinds of springs and other elastic elements. It can be divided into ordinary alloy spring steel and special alloy spring steel according to its performance requirements and operating conditions. Spring steel has excellent comprehensive performance, spring steel has excellent metallurgical quality (high purity and uniformity), good surface quality (strict control of surface defects and decarbonization), accurate shape and size.
    Chemical Composition
    ElementCSiMnPSN
    content(%)0.47-0.551.5-1.80.5-0.8≤0.045≤0.045≤0.007
    Mechanical Property
    strength of extension Rm/Mpayield strength Rp0.2/Mpaelongation δ/5 %
    1320-157011306
    percentage reduction of area ψ/%notched bar impact strength αkv /JAnnealing Hardness
    HBW
    25/245
    Heat Treatment
    annealing temperature
    /℃normalizing temperature
    /℃quenching temperaturetempering temperature
    /℃
    640-680850-880840-870350-550
    //water cooling/
    Product Application
    51Si7 manufactures all kinds of small section flat spring, round spring, spring, manufacture all kinds of springs, such as automobile, locomotive, tractor plate spring, coil spring manufacture all kinds of springs, such as automobile, locomotive, tractor plate spring, coil spring and so on.
    The Last But Not Least
    51Si7 Spring Steel can be supplied as steel plate/ sheet, round steel bar, steel tube/pipe, steel stripe.Spring Steel
    website:http://www.havens-metal.com/special-steel/spring-steel/

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