... hardness,resistant to oxidation, high temperature,acid and alkali,B: Electroplated emery wheels and moulds;C: Moulds with optical fiber or nylon ... toughness,excellent flexural strength,It is strong breaking tenacity resistant to high speed repetitive impact.YWN15: The alloy is for ... withstand high speed impact of automatic moulds .In addition to the advantages of F23,It has a better abrasion resistance ...