Main Chemical Component: C:0.20~0.40 Si:0.20~0.60 Mn:1.00~2.00 Cr:2.00~2.80 Mo:0.15~0.30 Hardness:150~220HB Application: Crawler wheel,die,gear, mould etc. Welding flux: SJ203 Nantong Ace welding produces all kinds of overlaying hardfacing flux cored welding wire for steel works, for electric factory, for mining machine, for mould, for valve, for sugar mill, for digger etc. we have the ability to develop new type of wires or copy the models.