• High strength material of chromium molybdenum
    steel and heat-treat by HRc30.

    ASAN utilize the chromium molybdenum steel
    (SAE4140, SCM 440), made it more stronger by 40% than
    carbon steel(SAE1046, S45C) and realized high strength
    by quenching and tempering.
    (Tensile strength is above 100kgㆍf/㎟)
    Afer Q/T treatment, thread part both pin and box to be induction
    hardened at HRc 50 hardness.
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