Your present location:Home > Products > Engineering Steel

GB 40Cr | JIS SCr440 | DIN 41Cr4(1.7035) | ASTM 5140 Engineering 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: 40Cr steel introduction
        GB 40CR alloy Steel is a high quality Quenched and Tempered Alloy Structural steel, It belong to the high quality low carbon,Low alloy chromium, molybdenum, nickel case hardening steel. Oil Quenched & Tempered Hardness is 28-34 HRc. GB 40CR steel Annealing delivery hardenss less than 250HB.40CR With a lower carbon content range, So GB 40CR alloy steel have good weldability.
    2: 40Cr  Steel equivalent
    Country Japan Germany Britain USA China Australia
    Standard JIS G4105 DIN EN 10250 BS970 ASTM A29 GB/T 3077 AS 1444
    Grade SCr440
    / 5140
    3: 40Cr steel chemical composition
    Grade C Si Mn P S Cr Ni Cu
    5140 0.38~0.45 0.35-0.43 0.6~0.9 0.025 0.025 0.9~1.2 0.12 0.017
    0.38 - 0.43 0.15 - 0.35
    0.6~0.9 0.03
    0.9~1.2 0.25 0.3
    0.38 - 0.45
    0.6 - 0.9
    0.9 - 1.2
    / /
    0.37~0.44 0.17~0.37
    / /
    4: 40Cr 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: 40Cr steel overviews
    Size Round Dia 6-1200mm
    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 40Cr alloy steels are used for the fastening piece, machine elements, sleeve gear Extrusion dies and diecasting for alumium, Mandgnesium allay mostly, for copper alloy could use mechaincal press forhing of steel, gears, shafts, spindles, crankshafts, sleeves, pins, connecting rods, screws, nuts, intake valves, etc.

    6: Delivery condition
        For hot forged  bar, usually the delivery condition is hot forged, annealed/QT, rough turned/Black surface.
        For hot rolled bar, usually the delivery condition is hot rolled, annealed/QT, Black surface.
        For hot forged block, usually the delivery condition is hot forged, annealed/QT, milled surface/Black surface
        For hot rolled plate, usually the delivery condition is hot rolled, annealed/QT, black surface.

        For cold drawn bar, usually the delivery condition is cold drawn, annealed/QT, peeled/black surface