Your present location:Home > Products > Spring Steel

GB 55CrMnA | JIS SUP9 | DIN 55Cr3 | ASTM 5155 Spring Steel

Port: Hu nan

engineering steel, cold work tool steel, hot work tool steel, plastic mold steel, spring steel, high speed steel, stainless steel

Alloy Structural Steel, Alloy Tool Steel, Carbon Structural Steel, Carbon Tool Steel, Bearing Steel, Spring Steel ,Stainless Steel, Refractory Steel, Roll Steel, Pinion Steel. Additionally, the company also has the capacity to forge round steel, steel flat, square steel, module, shaft and roller


  • Quick Details

    1: SUP9 steel introduction
        JIS SUP9 Steel is a high quality Cold work Spring Steel, It belong to the high quality high carbon alloy Spring Steel. Oil Quenched & Tempered Hardness is 28-34 HRc. SUP9 steel Annealing delivery hardenss less than 250HB.
    2: SUP9 Steel equivalent
    Country Japan BS China USA
    Standard JIS G4801 EN 10089 GB/T 1222 ASTM A29
    Grade SUP9 55Cr3 55CrMn 5155
    3: SUP9 steel chemical composition
    Grade C Si Mn P S Cr V Ni
    5155 0.51-0.59 0.15-0.35 0.7-0.9 0.035 0.040 0.7-0.9 / /
    55Cr3 0.52-0.59 0.4 0.7-1.0 0.025 0.025 0.7-1.0 / /
    SUP9 0.52-0.60 0.15-0.35 0.65-0.95 0.030 0.030 0.65-0.95 / /
    55CrMnA 0.52-0.60 0.17-0.37 0.65-0.95 0.025 0.020 0.65-0.95 / 0.35
    4: SUP9 steel mechanical properties  

        The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman.

    5: SUP9 steel overviews
    Size Round Dia 6-120mm
    Plate/Flat/Block Thickness
    Heat treatment Normalized ; Annealed ; Quenched ; Tempered
    Surface condition Black; Peeled; Polished; Machined; Grinded; Turned; Milled
    Delivery condition Forged; Hot rolled; Cold drawn
    Test Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. 
    Payment terms T/T;L/C;/Money gram/ Paypal
    Trade terms FOB; CIF; C&F; etc..
    Delivery time 30-45 days
    Application heavy vehicles, tractors, industrial production load, stress and the diameter of the larger plate spring and helical spring

    6: Delivery condition
        For hot rolled bar, usually the delivery condition is hot rolled, annealed, Black surface.
        For hot rolled sheet, usually the delivery conditon is hot rolled, annealed, black surface.