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Features and application: a high surface hardness, wear resistance and fatigue strength, and has good heat resistance and corrosion resistance, hardenability is not high. For the production of high wear resistance, high fatigue strength and considerable strength, high dimensional accuracy after the nitride parts, such as imitation mode, cylinder liner, gear, high pressure valves, boring bar, worm, grinding spindle and so on. However, part of a larger size should not be used.
Chemical Composition: Carbon C: 0.35 ~ 0.42 ,Si Si: 0.20 ~ 0.45 ,Manganese Mn: 0.30 ~ 0.60 ,S S: to allow the residual content ≤ 0.035 ,P P: ≤ 0.035 to allow the residual content ,Chromium Cr: 1.35 ~ 1.65 ,Ni-Ni: ≤ 0.030 to allow the residual content ,Copper Cu: ≤ 0.030 to allow the residual content ,Mo Mo: 0.15 ~ 0.25
Mechanical Properties:
Tensile strength σb (MPa): ≥ 980 (100)
Yield strength σs (MPa): ≥ 835 (85)
Elongation δ5 (%): ≥ 14
Reduction of area ψ (%): ≥ 50
Impact energy Akv (J): ≥ 71
Impact toughness αkv (J/cm2): ≥ 88 (9)
Hardness: ≤ 229HB
Sample size: Sample size is 30mm rough
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