International general plastic mould steel, vacuum degassing and ESR resmelting with low sulfur and gas, and excellent mirror surface smoothing property; prehardened delivery to save time after 100% inspection by ultra sonic machine to safeguard its quality;Widely used in such hot plastic injection or vacumm drawing moulds and press moulds main fittings for high load machine mould , constructure accessories, appereance design of TV,Washing Machine, Referigerature, Water Pot.