As the name implies, high-strength alloy steels are the most prominent property of these steels.

Hard alloy steels are the part of tool steel that contains the most alloying elements.

The main application of hard steels is in metal chipping, however, hard steels are used for turning, milling and cutting on hard objects.

High-strength alloy steels with a hardness (average) of 60 to 70 rackles are among the hardest alloy steels.

1.3207 High-strength alloy steel: This standard of high-strength steel, which contains more tungsten and vanadium in its alloy, has more hardness and strength compared to other standards in the group of high-strength steels.

The special feature and difference of this steel with other tool steels is maintaining hardness and abrasion resistance at working temperature (during cutting), ie about 700 degrees Celsius.

In all standards of high-strength steel, in addition to common elements in steels, elements such as cobalt, chromium, molybdenum, vanadium and tungsten have played an extraordinary role in the structure of steel and high-strength steels have emerged with cutting and machining properties.

This steel is used in the manufacture of lathe and milling tools for roughing and grinding, woodworking tools, high stress cold tools and chipping tools.

Also, this type of steel is used in the production of milling cutters, drilling rigs and tooling tools.

Other metal artifacts made with high-strength steels include drills, electric saws, saw blades, pens, and metal cutting tools.

Chemical composition of 1,3207 steel (by weight percentage)

Si	S	P	Mn	Cr (%)	C (%)
0,45 max	0,030 max	0,030 max	0,40 max	3,80 ～ 4,50	1,20 – 1,35

Fast-moving alloy steels are divided into two categories:

1- Steels containing tungsten

2- Steels containing molybdenum