En31

    #18nicrmo5 us equivalent

    #c45 equivalent material

    #c45 steel equivalent

    #sae 8620

    #ck45 steel

    #en31

    #sae 52100

    #sa 105

    #en8d chemical composition

    #20mn2

    #mild steel round bar specification

    #bright bar drawing

    #20mn2 chemical composition

    #is 2062