Steel 9Х4М3Ф2АГСТ (ЭК42)

Designation

Name	The value
Designation GOST Cyrillic	9Х4М3Ф2АГСТ
Designation GOST Latin	9X4M3F2AGCT
Transliteration	9H4M3F2AGST
By chemical elements	9Cr4Mo3V2NMnСTi

Name	The value
Designation GOST Cyrillic	ЭК42
Designation GOST Latin	EK42
Transliteration	EhK42
By chemical elements	-

Description

9Х4М3Ф2АГСТ steel is used: for the manufacture of cutting and threading tools for machining high-strength and high-temperature materials; tool, working with high impact loads; tools for machining carbon and low alloy steels, cast iron and nonferrous metals.

Note

The high speed steel with increased strength and increased tendency to decarburization and combustion of the molybdenum.

Standards

Name	Code	Standards
Bars and shapes	В32	TU 14-19-95-90

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	N	V	Ti	Mo
TU 14-19-95-90	0.87-0.97	≤0.03	≤0.03	0.55-0.75	4-4.5	0.5-0.7	≤0.5	Rest	0.04-0.1	1.6-2.1	0.1-0.25	2.7-3.2

Fe is the basis.
According to TU 14-19-95-90, the steel is introduced by calculation and chemical analysis is not determined: boron - by 0.0030%, REM - by 0.080% and calcium by 0.080%. In the finished metal, deviations in chemical composition are allowed by mass fraction: carbon ± 0.030%, silicon ± 0.050%, manganese ± 0.10%, chromium ± 0.30%, molybdenum + 0.10 / -0.050%, vanadium ± 0, 10%, titanium ± 0.010%, nitrogen ± 0.010%. A residual mass fraction of tungsten not exceeding 0.60% is allowed.

Physical characteristics

Temperature	r, kg/m³
20	8300

A description of the physical symbols

Name	Description
r	Density

Technological properties

Name	The value
Macrostructure and pollution	Requirements to the surface quality, macrostructure, depth bezoperatsionnogo layer hot-rolled and forged bars on the other 14-19-95-90 must meet the requirements of GOST 19265. Depth bezoperatsionnogo layer of bars is determined according to GOST 1763 method M (etching in 4% solution of nitric acid in ethyl alcohol).
Microstructure	Grain size of austenite steel after quenching should be not larger than 8 rooms. The austenite grain control on the samples after quenching in oil with 1205-1220 °C. the holding Time for hardening samples - according to GOST 19265.
Particularities of production of goods	Bars hot rolled and forged on the other 14-19-95-90 are supplied in the annealed condition according to the mode of the manufacturer, with hardness not exceeding 269 HB (indentation diameter not less than 3.7 mm). Hardness of the samples after quenching and two-three times of the holiday must be at least 62 HRC. To control the hardness after quenching the samples subjected to heat treatment regime: Quenching in oil with 1205-1220 °C, two to three-fold vacation at 550-560 °C with exposure for 1 hour and subsequent air cooling. The holding time for hardening of the samples must meet the requirements of GOST 19265.
Sanding behaviour	Satisfactory.