(%): Carbon chromium molybdenum manganese nickel tungsten vanadium silicon aluminum C Cr Mn Ni WV Al0.95 0.6 1.2 0.6 0.11 4. After hardening and tempering, the high surface hardness and the good match of the toughness of the machine body are small imprint modulus gauge, measuring tool lathe thimble guide sleeve, ejector rod, small/medium drill bit and tapping pinion, piston, nozzle , Cam high-quality non-deformation wear-resistant oil steel, high hardness, never deformed. 190HB
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