30KHMA steel is used: for the production of forgings for General purpose rotors and disks of steam turbines, flanges, gears, shafts, axles, pins, nuts, bolts and various other parts operating at temperatures up to 450−500°C; details of pipeline valves by conducting the heat treatment; tubes for plants of chemical and petrochemical plants with nominal pressure PN=19.6−98 MPa (200−1000 kgf/cm²); pipes, designed for pipes in installations for the production of ammonia with a working pressure of PN=31 MPa (320 kgf/cm²); seamless pipes for the fabrication of parts and structures in motovelotehnika; wire intended for the manufacture of rivets and bolts by cold heading.

Note

Structural steel high quality chromium molybdenum.

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 10702-78, GOST 14955-77, TU 14-1-2118-77, TU 14-11-245-88, TU 14-1-5228-93, TU 14-136-367-2008
Bars and shapes	В22	GOST 1133-71, GOST 8319.0-75, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Processing of metals by pressure. Forgings	В03	GOST 8479-70, OST 26-01-135-81, TU 108.11.653-82
Steel pipes and fittings to them	В62	GOST 8732-78, GOST 9567-75, GOST 12132-66, GOST 23270-89, GOST 30563-98, GOST 30564-98, GOST 8731-87, GOST Р 53383-2009, TU 14-3Р-251-2007, TU 14-159-127-91, TU 14-3-251-74, TU 14-3-309-74, TU 14-3-433-75, TU 14-3-565-77, TU 14-3-473-76, TU 14-159-179-2003, TU 14-134-291-91, TU 14-3-1654-89, TU 14-161-180-99, TU 14-161-149-94
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-5349-97, TU 14-1-1357-75, TU 14-1-4944-90
Thermal and thermochemical treatment of metals	В04	ST ЦКБА 026-2005
Steel wire medium and high carbon	В72	TU 14-4-385-73

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Ti	Mo	W
GOST 4543-71	0.26-0.33	≤0.025	≤0.025	0.4-0.7	0.8-1.1	0.17-0.37	≤0.3	Rest	≤0.3	≤0.05	≤0.03	0.15-0.25	≤0.2
GOST 10702-78	0.26-0.33	≤0.025	≤0.025	0.4-0.7	0.8-1.1	≤0.2	≤0.3	Rest	≤0.3	≤0.05	≤0.03	0.15-0.25	≤0.2
TU 14-161-149-94	0.27-0.32	≤0.013	≤0.018	0.4-0.7	-	0.17-0.37	≤0.25	Rest	≤0.12	-	-	-	-

Fe is the basis.
GOST 4543-71 regulates the content of high-quality steel: P≤0,025%; S≤0.015%; Сu≤0.25%. In accordance with the order, the content of Si = 0.10-0.37% can be established.
According to TU 14-161-149-94, the chemical composition is given for steel grade 30ХМА for casing pipes and couplings for them of hydrogen sulfide-resistant and cold-resistant ones.

Mechanical properties

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa	HRC	HRB
Hot-rolled steel and hot rolled with special surface finish
-	-	-	-	-	-	-	≤217	-	-
Steel calibrated and calibrated with special surface finish
-	-	-	440-640	-	-	-	-	-	-
-	-	-	-	-	-	-	≤229	-	-
Forgings. Hardening + Vacation
≤100	-	≥395	≥615	≥17	≥45	≥481	187-229	-	-
≤100	-	≥440	≥635	≥14	≥40	≥530	197-235	-	-
≤100	-	≥490	≥655	≥16	≥45	≥579	212-248	-	-
Seamless hot deformed tubes in the delivery condition heat treated
	-	≥392	≥588	≥13	-	-	-	-	-
Blank pieces of pipe fittings. Quenching in oil (or water) from 860-880 °C (exposure for 2.5-4.0 hours depending on the thickness and weight of the workpiece) + Vacation, air cooling
≤120	620-640	≥540	≥813	≥16	≥40	≥392	223-262	-	-
Rolled steel. Quenching in water from 880 °C to + Leave at 500 °C (indicated as the place of clippings sample)
100	-	≥700	≥830	≥17	≥65	≥1344	-	≥27	-
Rolled steel. Quenching in oil at 880 °C + Vacation
-	200	≥1320	≥1520	≥12	≥50	≥690	-	≥49	-
A sample with a diameter of 6 mm, length 30 mm, pressed. The rate of deformation of 16 mm/min strain Rate of 0.009 1/s
-	-	≥80	≥130	≥69	≥67	-	-	-	-
Blank pieces of pipe fittings. Quenching in oil (or water) from 860-880 °C (exposure for 2.5-4.0 hours depending on the thickness and weight of the workpiece) + Vacation, air cooling
≤200	640-660	≥395	≥590	≥15	≥40	≥392	187-229	-	-
Rolled steel. Quenching in water from 880 °C to + Leave at 500 °C (indicated as the place of clippings sample)
80	-	≥760	≥890	≥14	≥64	≥1060	-	≥30	-
Rolled steel. Quenching in oil at 880 °C + Vacation
-	300	≥1330	≥1450	≥11	≥51	≥490	-	≥45	-
A sample with a diameter of 6 mm, length 30 mm, pressed. The rate of deformation of 16 mm/min strain Rate of 0.009 1/s
-	-	≥41	≥56	≥64	≥100	-	-	-	-
Blank pieces of pipe fittings. Quenching in oil (or water) from 860-880 °C (exposure for 2.5-4.0 hours depending on the thickness and weight of the workpiece) + Vacation, air cooling
≤80	540-600	640-785	≥880	≥13	≥42	≥588	229-286	-	-
Rolled steel. Quenching in water from 880 °C to + Leave at 500 °C (indicated as the place of clippings sample)
120	-	≥690	≥840	≥18	≥63	≥1158	-	≥25	-
Rolled steel. Quenching in oil at 880 °C + Vacation
-	400	≥1220	≥1370	≥12	≥55	≥690	-	≥42	-
A sample with a diameter of 6 mm, length 30 mm, pressed. The rate of deformation of 16 mm/min strain Rate of 0.009 1/s
-	-	≥14	≥26	≥55	≥100	-	-	-	-
Rolled steel. Quenching in water from 880 °C to + Leave at 500 °C (indicated as the place of clippings sample)
40	-	≥790	≥930	≥13	≥61	≥1158	-	≥30	-
Rolled steel. Quenching in oil at 880 °C + Vacation
-	500	≥1080	≥1130	≥16	≥60	≥1270	-	≥36	-
Couplings for casing pipe serovodoroda and cold-resistant from steel 30KHMA, thermally and thermo-mechanical processed in the state of delivery on the other 14-161-149-94. In the delivery condition the products and the group of strength, the COP or the EU. In the graph given the values of KCU KCV at different temperatures test KCV+20°C/KCV-40°C<</th>
-	-	549-657	≥657	≥16	-	≥785/589	-	-	≤98
Rolled steel. Quenching in oil at 880 °C to + Vacation at 650 °C
-	-	≥590	≥730	≥20	≥70	-	-	-	-
Rolled steel. Quenching in water from 880 °C to + Leave at 500 °C (indicated as the place of clippings sample)
60	-	≥740	≥870	≥16	≥64	≥1246	-	≥31	-
Couplings for casing pipe serovodoroda and cold-resistant from steel 30KHMA, thermally and thermo-mechanical processed in the state of delivery on the other 14-161-149-94. In the delivery condition the products and the group of strength, the COP or the EU. In the graph given the values of KCU KCV at different temperatures test KCV+20°C/KCV-40°C<</th>
-	-	519-617	≥647	≥18	-	≥1177/589	-	-	≤95
Rolled steel. Quenching in oil at 880 °C to + Vacation at 650 °C
-	-	≥490	≥660	≥21	≥70	-	-	-	-
Wire on the other 14-4-385-73 in the delivery condition. Subanguina with pre-annealing to granular pearlite
	-	-	441-638	≥10	-	-	-	-	-
Rolled steel. Quenching in oil at 880 °C to + Vacation at 650 °C
-	-	≥520	≥710	≥21	≥69	-	-	-	-
Long products (wire). Quenching in oil at 880 °C + Vacation at 540 °C, cooling in water
15	-	≥735	≥930	≥12	≥55	≥780	-	-	-
Rolled steel. Quenching in oil at 880 °C to + Vacation at 650 °C
-	-	≥480	≥630	≥22	≥75	-	-	-	-
-	-	≥430	≥500	≥22	≥80	-	-	-	-
Seamless hot deformed tubes for installations high pressure on the other 14-3-433-75 in the state of delivery of heat treated (longitudinal samples)
-	-	≥373	≥588	≥10	-	≥981	-	-	-
Rolled steel. Quenching in oil at 880 °C to + Vacation at 650 °C
-	-	≥340	≥330	≥29	≥89	-	-	-	-
Seamless hot deformed tubes for installations high pressure on the other 14-3-433-75 in the state of delivery of heat treated (longitudinal samples)
-	-	≥255	≥490	-	-	-	-	-	-
Seamless cold-deformed pipes for the chemical and petrochemical industries in the state of delivery (indicate the cutting direction of sample)
-	-	≥392	≥588	≥13	-	≥686	169-217	-	-
-	-	≥392	≥588	≥15	-	≥780	169-217	-	-

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
y	The relative narrowing
KCU	Toughness
HB	Brinell hardness number
HRC	Rockwell hardness (indenter diamond spheroconical)
HRB	Rockwell hardness (indenter steel, spherical)

Physical characteristics

Temperature	Е, HPa	r, kg/m³	l, W/(m · °C)	R, Mr. · m	a, 10^-6 1/°C	С, J/(kg · °C)
0	208	7820	-	230	-	-
20	208	7820	-	230	-	-
100	207	7800	46	-	116	462
200	204	7770	44	-	125	-
300	197	7740	42	-	132	462
400	188	7700	42	-	138	-
500	176	7660	39	-	138	-
600	160	-	37	-	-	-
700	-	-	36	-	143	-
800	-	-	32	-	-	-

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

Technological properties

Name	The value
Weldability	Limited weldability.
Склонность к отпускной хрупкости	Tend not.
Flock-sensitive sensitivity	Insensitive.
Macrostructure and pollution	Contamination of the steel pipe casing and couplings thereto serovodoroda and cold-resistant on the other 14-161-149-94 non-metallic inclusions (OS, OT, SP, CX) must not exceed the average score of 2.5.

Steel 30KHMA

Designation

Description