KUSHAL METAL & STEEL INDUSTRIES

TOUGHNESS The impact value at room and high temperature is higher than that of SKH51 and SKD7. Excellent in thermal shock resistance and toughness. Test Condition  T.P, Size 10 angle x 55mm 2U Notch SOFTENING RESISTANCE OF SURFACE OF NITRIDED LAYER Superior in softening resistance compared to SKD62 and SKD7 after nitriding (tuffriding) and O being held 600 C for 100 hours. STANDARD HEAT TREATMENT Recommended Condition Quenching Tempering Hardness O 1040~1100 C Oil, Pressurized gas cooling O 540~650 C Air cooling x 2 times 45~55 (HRC) HARDNESS CURVE BY QUENCHING & TEMPERING