The Tool Steel


• The tool steel is subdivided into:
o the tool carbon steel;
o the tool alloyed steel;
o The high speed tool steel;
• The range of products of the tool steel is in the following conformity:

• hot-rolled rounds per GOST 2590-88 ;
• hot-rolled squares per GOST 2591-88 ;
• forged rounds and squares per GOST 1133-88 ;
• hot-rolled strips per GOST 4405-75 .

The Carbon Tool Steel

Carbon tool steel is produced per GOST 1435-74 .
Carbon tool steel is marked with the letter , this denoting a carbon steel, and a number to indicate the carbon content in centesimal percentage. The high quality steel is marked with letter A at the end of the grade designation. For example: 12 contains 1,2% and belongs to the high quality steels, grades: 7, 8, 9, 10, 11,12 13.
Applications: The carbon tool steel is used to manufacture tools ( the drills, tapping tools, rimmers, files and etc.), operating under light cutting conditions (low-speed, the tool is heated not more than 2000 C). The main disadvantage of the carbon tool steel is that they have low heat resistance hence rapidly weakening when heated.
The welding capacity: The carbon tool steel is not used for welding.

Alloyed Tool Steel (including die steel)

Is manufactured as per GOST 5950-2000.
The grades: 9, , 12, 121, 45 and etc.
The steels 12, 121, 45 refers to the types of die steels.
The letters and digits in the grade designation denotes: the digit – the average carbon content in percent decimals, X – Chromium doped, B – Wolframium doped, – Manganese doped. The quantity of chromium, wolframium and manganese in steel is defined by GOST.
The steel 9 are interchangeable. The steel 9 is the substitute of grade 65.
Applications: is used to manufacture cutting tools (tap-screw, drill bits, dies, rimmers, milling cutters, broaches), as well as press tools for more essential application, than tools made from carbon tool steel.
The welding capacity: the tool alloyed steel is not used for welding.

The Tool Fast-machined Steel

Is manufactured as per GOST 19265-73.
The grades: 18, 65, 95 and etc.
The letters and digits in grades designation denote: P-fast-machined, Digit – the Wolframium content in percent decimals, M, K – molybdenum or cobalt doped, its quantity is defined by GOST.
Application: the fast-machined steel is used for cutting tools. They are heat-resistant (600-6500 depending on composition and method of processing), extreme hardness and durability at high temperature and resistance to plastic strain.
The welding capacity: is used for butt-seam welding of steels 45 and 40.
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