SKS4 SKS4 chrome silicon steel is based on adding a certain amount of tungsten and the formation of the steel, because the quenching of tungsten help save more fine grain, leaving the tempering condition to obtain high toughness. SKS4 than 4CrW2Si steel and steel with high quenching hardness 5CrW2Si steel and some high-temperature strength. To withstand shock loads typically used in the manufacture of high wear resistance but requires tools such as pneumatic tools, chisels and punch Bureau mold, cold shear blades, punch with the die edge, pneumatic hammers and other tools.

Chemical composition

　　SKS4 chemical composition of steel　

C	Si	Mn	Cr	W	P	S
0.55~0.65	0.50~0.80	≤0.40	1.00~1.30	2.00~2.70	≤0.030	≤0.030

Physical properties

　　SKS4 critical temperature of steel

Critical point	Ac1	Ac3	Ms
Temperature (approximate) / ℃	775	810	280

SKS4 the thermal processing of steel

　　SKS4 thermal processing