... the toughness of the best toughness and wear resistance alloy steel, set for an organic whole, make the product is wear- ... hammer head adopts chromium, fierce, silicon, rare earth, vanadium, titanium, molybdenum, nickel, boron, etc DuoZhong precious rare metal, use the ... gangue, coke, mining ores of breaking industry hammer make alloy and hammer together wear-resisting strength and toughness to achieve ...