30KHGS steel is used: for the manufacture of various upgradable parts: shafts, axles, gears, brake bands of motors, flanges, housings plating, blades, compressor machines, levers, tappets, responsible welded structures, fasteners, operating at alternating loads; seamless drill pipes used in geological core drilling.

Note

Structural steel quality chromonemata.

Standards

Name	Code	Standards
Sheets and strips	В23	GOST 103-2006
Bars and shapes	В32	GOST 1051-73, GOST 4543-71, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-1-2118-77, TU 14-11-245-88, TU 14-1-1271-75, TU 14-136-367-2008
Bars and shapes	В22	GOST 1133-71, GOST 8319.0-75, GOST 2590-2006, GOST 2591-2006
Steel pipes and fittings to them	В62	GOST 7909-56
Processing of metals by pressure. Forgings	В03	GOST 8479-70, ST ЦКБА 010-2004
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-4944-90
Sheets and strips	В33	TU 14-1-4118-86, TU 14-1-4118-2004

Mechanical properties

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d₄	d₁₀	y, %	KCU, kJ/m²	HB, MPa	HRC
Forgings. Normalization
100	-	≥395	≥615	≥17	-	-	≥45	≥579	187-229	-
Quenching in oil with 860-880 °C + vacation at 200-250 °C air cooling
≤30	-	≥1270	≥1470	≥7	-	-	≥40	-	-	43-51
Quenching in oil at 880 °C to + vacation at 600 °C, cooling in water
120-160	-	≥580	≥750	≥14	-	-	≥50	≥765	≤210	-
A rod with a diameter of 20-70 mm. Quenching in oil at 880 °C + vacation
-	200	≥1570	≥1700	≥11	-	-	≥44	≥863	-	-
Quenching in oil at 880 °C to + vacation at 560 °C, air cooling
-	-	950	1050	13	-	-	56	510	-	-
Quenching in oil with 860-880 °C + vacation at 540-560 °C, cooling in water or oil
40-60	-	≥690	≥880	≥9	-	-	≥45	≥579	≤225	-
Quenching in oil at 880 °C to + vacation at 600 °C, cooling in water
160-180	-	≥510	≥710	≥13	-	-	≥45	≥481	≤200	-
A rod with a diameter of 20-70 mm. Quenching in oil at 880 °C + vacation
-	300	≥1520	≥1630	≥11	-	-	≥54	≥677	-	-
Quenching in oil at 880 °C to + vacation at 560 °C, air cooling
-	-	840	1000	13	-	-	48	1236	-	-
Quenching in oil at 880 °C + vacation at 540 °C, cooling in water
≤25	-	≥835	≥1080	≥10	-	-	≥45	≥432	-	-
Quenching in oil at 880 °C to + vacation at 600 °C, cooling in water
25-40	-	≥820	≥930	≥12	-	-	≥51	≥677	≤275	-
A rod with a diameter of 20-70 mm. Quenching in oil at 880 °C + vacation
-	400	≥1320	≥1420	≥12	-	-	≥56	≥481	-	-
Quenching in oil at 880 °C to + vacation at 560 °C, air cooling
-	-	820	950	11	-	-	50	1216	-	-
Quenching in oil at 880 °C + vacation at 600 °C, cooling in water
25-40	-	≥820	≥930	≥12	-	-	≥51	≥677	-	-
Quenching in oil at 880 °C to + vacation at 600 °C, cooling in water
40-80	-	≥730	≥860	≥14	-	-	≥50	≥765	≤250	-
A rod with a diameter of 20-70 mm. Quenching in oil at 880 °C + vacation
-	500	≥1140	≥1220	≥15	-	-	≥56	≥765	-	-
Quenching in oil at 880 °C to + vacation at 560 °C, air cooling
-	-	780	900	16	-	-	69	922	-	-
Quenching in oil at 880 °C + vacation at 600 °C, cooling in water
40-80	-	≥730	≥860	≥14	-	-	≥50	≥765	-	-
Quenching in oil at 880 °C to + vacation at 600 °C, cooling in water
80-120	-	≥670	≥820	≥14	-	-	≥50	≥765	≤235	-
A rod with a diameter of 20-70 mm. Quenching in oil at 880 °C + vacation
-	600	≥940	≥1040	≥19	-	-	≥62	≥1344	-	-
Quenching in oil at 880 °C to + vacation at 560 °C, air cooling
-	-	650	690	21	-	-	84	706	-	-
Flats on the other 14-1-4118-2004
	-	-	490-740	-	≥14	≥16	-	-	-	-
The sample is diameter 5 mm, length 25 mm. Laminated. The rate of deformation of 2 mm/min strain rate 0,0013 1/p [81]
-	-	-	175	59	-	-	51	-	-	-
-	-	-	85	62	-	-	75	-	-	-
-	-	-	53	84	-	-	90	-	-	-
-	-	-	37	71	-	-	90	-	-	-
-	-	-	21	59	-	-	90	-	-	-
-	-	-	10	85	-	-	90	-	-	-

Description mechanical marks

Name	Description
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	Limit short-term strength
d₅	Elongation after rupture
d₄	Elongation after rupture
d₁₀	Elongation after rupture
y	The relative narrowing
KCU	Toughness
HB	Brinell hardness number
HRC	Rockwell hardness (indenter diamond spheroconical)

Physical characteristics

Temperature	Е, HPa	G, HPa	r, kg/m³	l, W/(m · °C)	R, Mr. · m	a, 10^-6 1/°C	С, J/(kg · °C)
0	194	84	7850	-	210	-	-
20	194	-	7850	-	210	-	-
100	185	82	7830	37	-	12	493
200	173	79	7800	41	-	125	504
300	169	75	7760	38	-	129	512
400	166	71	7730	37	-	132	533
500	156	66	7700	36	-	136	554
600	-	62	7670	35	-	136	584
700	-	54	-	34	-	-	622
800	-	47	-	32	-	139	622
1000	-	-	-	-	-	-	693

A description of the physical symbols

Name	Description
Е	The normal elasticity modulus
G	Modulus of elasticity shear torsion
r	Density
l	Coefficient of thermal conductivity
R	UD. the resistivity
a	The coefficient of linear expansion

Technological properties

Name	The value
Weldability	limited weldability. Welding methods: SMAW, ADS submerged arc and gas protection, ARDS, ESW. Recommended heating and subsequent heat treatment, the CCC without restriction.
Склонность к отпускной хрупкости	inclined
The temperature of forging	Start - 1240 °C, the end - of 800 °C. the cross Sections up to 50 mm are cooled in stacks in the air, 51-100 mm - in boxes.
Flock-sensitive sensitivity	sensitive

Steel 30KHGS

Designation

Description