Steel of the Urals. Rolled metal Ekaterinburg. Sale of tool alloy steels Ekaterinburg :: Characteristics of steel 30ХМА, GOST 4543-71, GOST 2590-2006

General characteristics of steel grade 30ХМА

The heat-resistant relaxation grade 30ХМА belongs to low-alloy medium-carbon steels. It has little flake sensitivity and is not prone to temper brittleness .

30ХМА is characterized by a pronounced uneven distribution of phosphorus and sulfur throughout the thickness of the rolled product. To lower the threshold of cold brittleness and increase the mechanical properties of this grade, alloying elements are introduced into 30KhMA , which form solid solutions and chemical compounds with carbon, iron and other elements and change its properties. In addition, to increase corrosion resistance , a small amount of copper is added to it.

Steel grade 30ХМА is chrome-molybdenum and has limited weldability by manual and automatic submerged arc welding and gas protection. Preheating and subsequent heat treatment are recommended.


Substitute:	35ХМ
GOST standards:	GOST 8479-70, GOST 1133-71, GOST 8319.0-75, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006, GOST 103-2006, GOST 1051-73, GOST 4543-71, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 10702-78, GOST 14955-77, GOST 8732-78 (ST SEV 1481-78), GOST 9567-75, GOST 12132-66, GOST 23270-89 (ISO 2938- 74), GOST 30563-98, GOST 30564-98, GOST 8731-87, GOST R 53383-2009
Application:	general purpose forgings, shafts, rotors and disks of steam turbines, flanges, fasteners with operating temperatures up to 450 degrees, long products

Read more about the use of 30XMA here >>

Steel 30ХМА

Total information

Substitute

Steel 35XM, Steel 35XRA

Type of delivery

Long products, including shaped steel: GOST 4543-71, GOST 259071, GOST 2591-71, GOST 2879-69. Calibrated rod GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 1051-73.
Polished rod and silver GOST 14955-77.

Strip GOST 103-76.

Forgings and forged blanks GOST 1133-71, GOST 8479-70.

Purpose

Gears, shafts, axles, studs, nuts, and various other parts operating at temperatures up to 450-500°C.

Chemical composition (according to GOST 4543-2016)

Chemical element	%
Carbon (C)	0.26-0.33
Silicon (Si)	0.17-0.37
Copper (Cu), no more	0.30
Molybdenum (Mo)	0.15-0.25
Manganese (Mn)	0.40-0.70
Nickel (Ni), no more	0.30
Phosphorus (P), no more	0.025
Chromium (Cr)	0.80-1.10
Sulfur (S), no more	0.025

Mechanical properties

Heat treatment, delivery condition	Section, mm	σ0.2, MPa	σB, MPa	δ5, %	ψ, %	KCU, J/m2	HB
Bar. Hardening 880 °C, low. Temperature 540 °C, water or oil.
15	735	930	12	55	78
Forgings. Hardening. Vacation.
KP 395	<100	395	615	17	45	49	187-229
KP 440	100-300	440	635	16	45	59	197-235
KP 440	100-300	440	635	14	40	54	197-235
KP 490	<100	490	655	16	45	59	212-248

Mechanical properties at elevated temperatures

test t, °C	σ0.2, MPa	σB, MPa	δ5, %	ψ, %	KCU, J/m2
Hardening 880 °C, oil. Vacation 650 °C
260	590	730	20	70	186
200	490	660	21	70
300	520	710	21	69	206
400	480	630	22	75	199
500	430	500	22	80	142
600	340	330	29	89	142
Sample 6 mm in diameter, 30 mm long, pressed. Deformation speed 16 mm/min. Strain rate 0.009 1/s
800	80	130	69	67
1000	41	56	64	100
1200	14	26	55	100

Mechanical properties depending on tempering temperature

holiday t, °С	σ0.2, MPa	σB, MPa	δ5, %	ψ, %	KCU, J/m2	HRСе
Hardening 880 °C, oil.
200	1320	1520	12	50	69	49
300	1330	1450	11	51	49	45
400	1220	1370	12	55	69	42
500	1080	1130	16	60	127	36

Mechanical properties depending on the section

Heat treatment, delivery condition	Section, mm	σ0.2, MPa	σB, MPa	δ5, %	ψ, %	KCU, J/m2	HRСе
Hardening 880 °C, oil. Vacation 500 °C.
Place of sample cutting - center	40	650	820	17	71	147	27
Place of sample cutting - center	60	630	800	17	69	157	27
Sample cutting location - 1/2R	80	660	790	17	67	137	25
Sample cutting location - 1/2R	100	610	780	18	64	147	25
Sample cutting location - 1/3R	120	620	750	16	63	137
Quenching 880 °C, water. Vacation 500 °C.
Place of sample cutting - center	40	790	930	13	61	118	30
Place of sample cutting - center	60	740	870	16	64	127	31
Sample cutting location - 1/2R	80	760	890	14	64	108	30
Sample cutting location - 1/2R	100	700	830	17	65	137	27
Sample cutting location - 1/3R	120	690	840	18	63	118	25

Critical point temperature

Critical point	°C
Ac1	757
Ac3	807
Ar3	763
Ar1	693

Impact strength

Impact strength, KCU, J/cm2

Delivery condition, heat treatment	-20	-40	-60
Hardening 880 C, oil. Holiday 350 C.	42
Hardening 880 C, oil. Holiday 550 C.	147	108

Endurance limit

σ-1, MPa	n	Heat treatment, steel condition
407	1E+7	Quenching 870 °C, water. Vacation 600 °C
366	HB 260. Hardening 880 °C, oil. Vacation 560 °C
304	HB 212. Hardening 880 °C, oil. Vacation 650 °C

Hardenability

Hardening 880 C. Hardness for hardenability strips HRCе.

Distance from the end, mm / HRC e
1.5	3	4.5	6	9	12	15	18	21	24
49.5-54	48-53	46-52	43.5-51	37-48	33.5-44.5	30-39.5	28-37.5	26.5-35.5	24-34.5

Physical properties

Test temperature, °C	20	100	200	300	400	500	600	700	800	900
Modulus of normal elasticity, E, GPa	208	207	204	197	188	176	160
Density, ρn, kg/cm3	7820	7800	7770	7740	7700	7660
Thermal conductivity coefficient W/(m °C)	46	44	42	42	39	37	36	32
Ud. electrical resistance (ρ, NΩ m)	230
Test temperature, °C	20- 100	20- 200	20- 300	20- 400	20- 500	20- 600	20- 700	20- 800	20- 900	20- 1000
Linear expansion coefficient (α, 10-6 1/°С)	11.6	12.5	13.2	13.8	14.3
Specific heat capacity (s, J/(kg °C))	462

Foreign analogues of Steel 30ХМА

Legend

Mechanical properties
σB	temporary tensile strength (tensile strength), MPa
σ0.2	conditional yield strength, MPa
σcom	compressive strength, MPa
σco0.2	compressive yield strength, MPa
σ0.05	elastic limit, MPa
σben	bending strength, MPa
σ-1	endurance limit during bending test with a symmetrical loading cycle, MPa
δ5, δ4, δ10	relative elongation after rupture, %
ψ	relative narrowing, %
ν	relative shift, %
ε	relative settlement at the appearance of the first crack, %
τK	ultimate torsional strength, maximum shear stress, MPa
τ-1	endurance limit during torsion testing with a symmetrical loading cycle, MPa
KCU and KCV	impact strength, determined on a sample with concentrators of the U and V types, J/cm2
HRСе and HRB	Rockwell hardness (scale C and B respectively)
HB	Brinell hardness
H.V.	Vickers hardness
HSD	Shore hardness
Physical properties
E	normal modulus of elasticity, GPa
G	modulus of elasticity in torsional shear, GPa
ρn	density, kg/m3
λ	thermal conductivity coefficient, W/(m∙°C)
ρ	electrical resistivity, Ohm∙m
α	linear thermal expansion coefficient, 10-61/°С
With	specific heat capacity, J/(kg∙°С)

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Chemical composition in % of material 30ХМА

C	Si	Mn	Ni	S	P	Cr	Mo	Cu
0.26 — 0.33	0.17 — 0.37	0.4 — 0.7	up to 0.3	up to 0.025	up to 0.025	0.8 — 1.1	0.15 — 0.25	up to 0.3

The temperature of the critical points of the material is 30ХМА.

Ac1 = 757, Ac3(Acm) = 807

Mechanical properties at T=20oC of material 30ХМА.

Assortment	Size	Eg.	sв	sT	d5	y	KCU	Thermal change
—	mm	—	MPa	MPa	%	%	kJ/m2	—
Bar	F 15	930	735	12	50	880	Quenching 880oC, oil, Tempering 540oC, water,

The hardness of the material is 30ХМА after annealing,

HB 10 -1 = 229 MPa

Physical properties of the material 30ХМА.

T	E 10- 5	a 10 6	l	r	C	R 10 9
hail	MPa	1/Grad	W/(m deg)	kg/m3	J/(kg deg)	Ohm m
20	2.08	7820	230
100	2.07	11.6	46	7800	462
200	2.04	12.5	44	7770
300	1.97	13.2	42	7740
400	1.88	13.8	42	7700
500	1.76	14.3	39	7660
600	1.6	37
700	36
800	32
T	E 10- 5	a 10 6	l	r	C	R 10 9

Technological properties of material 30ХМА.

Weldability:	limited weldability.
Flock Sensitivity:	sensitive.
Tendency to temper brittleness:	not inclined.

Remaining metal steel 30ХМА for March-April 2021.

Name	brand	size	remainder	price
Circle	30ХМА	105mm	1,634	155000
Pipe	30ХМА	108×10mm	0,237	125000
Pipe	30ХМА	108×9mm	1,135	125000
Round forging	30ХМА	110×125mm	1	106000
Pipe	30ХМА	127×10mm	2,73	125000
Circle	30ХМА	130mm	3,185	118000
Pipe	30ХМА	133×12mm	0,575	92000
Circle	30ХМА	14.7mm	0,345	119688,3
Circle	30ХМА	140mm	1,01	100000
Circle	30ХМА	14mm	0,79	92000
Circle	30ХМА	160mm	5,423	121000
Circle	30ХМА	16mm	0,33	100000
Circle	30ХМА	170mm	2,76	100000
Circle	30ХМА	18.5mm	0,929	119688,3
Pipe	30ХМА	180×36mm	5,333	165000
Circle	30ХМА	180mm	0,228	100000
Circle	30ХМА	18mm	1,211	155000
Circle	30ХМА	190mm	3,791	121000
Round forging	30ХМА	195×70mm	1	111000
Circle	30ХМА	20.5mm	0,52	119688,3
Circle	30ХМА	200mm	1,245	121000
Circle	30ХМА	20mm	0,281	118000
Circle	30ХМА	210mm	1,22	100000
Pipe	30ХМА	219×36mm	5	157700
Circle	30ХМА	22.5mm	0,585	111599,8
Circle	30ХМА	22mm	0,239	100000
Circle	30ХМА	240mm	9,119	133000
Circle	30ХМА	24mm	1,38	100000
Circle	30ХМА	25mm	2,583	155000
Round forging	30ХМА	260×70mm	1	111000
Circle	30ХМА	260mm	1,23	123000
Round forging	30ХМА	260mm	0,64	104260
Circle	30ХМА	270mm	0,275	121000
Pipe	30ХМА	273×17mm	1,739	111000
Circle	30ХМА	2870mm	5,6	123000
Circle	30ХМА	28mm	0,285	92000
Circle	30ХМА	290mm	14,759	167500
Round forging	30ХМА	300×330mm	0,405	106000
Square	30ХМА	300mm	5,014	160000
Round forging	30ХМА	300mm	0,64	104260
Sheet	30ХМА	30mm	1,304	107000
Round forging	30ХМА	310×460mm	0,625	106000
Circle	30ХМА	310mm	7,595	167500
Circle	30ХМА	320mm	2,403	175000
Circle	30ХМА	32mm	0,2	92000
Circle	30ХМА	330mm	0,426	175000
Circle	30ХМА	340mm	0,25	123000
Circle	30ХМА	350mm	5,691	175000
Round forging	30ХМА	360mm	9,58	143000
Circle	30ХМА	36mm	0,46	92000
Circle	30ХМА	370mm	1,71	175000
Round forging	30ХМА	370mm	4,79	143000
Round forging	30ХМА	380mm	6	143000
Circle	30ХМА	390mm	2,993	175000
Round forging	30ХМА	390mm	5,97	143000
Round forging	30ХМА	395×5730mm	5,8	113000
Round forging	30ХМА	400×5890mm	5,8	113000
Circle	30ХМА	400mm	3,959	175000
Round forging	30ХМА	400mm	5,84	133000
Pipe	30ХМА	406×13mm	1,11	93300
Circle	30ХМА	415mm	6,11	175000
Round forging	30ХМА	415mm	5,172	223500
Hexagon	30ХМА	41mm	2,392	106000
Round forging	30ХМА	420mm	2,56	143000
Circle	30ХМА	430mm	16,47	175000
Round forging	30ХМА	430mm	7,65	143000
Circle	30ХМА	4440mm	1	123000
Round forging	30ХМА	445mm	2,55	143000
Circle	30ХМА	450mm	4,89	175000
Circle	30ХМА	45mm	0,305	92000
Round forging	30ХМА	460mm	7,64	143000
Round forging	30ХМА	465mm	5,75	143000
Circle	30ХМА	470mm	12,38	175000
Round forging	30ХМА	480mm	6,43	133000
Circle	30ХМА	490mm	0,2	123000
Round forging	30ХМА	495mm	3,76	143000
Circle	30ХМА	500mm	5,5	123000
Round forging	30ХМА	500mm	6,62	133000
Square	30ХМА	50mm	0,45	92000
Circle	30ХМА	510mm	0,64	98000
Round forging	30ХМА	510mm	10,25	143000
Round forging	30ХМА	525mm	5,93	143000
Round forging	30ХМА	530mm	4,96	143000
Round forging	30ХМА	540mm	8,25	133000
Circle	30ХМА	550mm	5,56	123000
Round forging	30ХМА	550mm	6,81	143000
Round forging	30ХМА	553mm	2,3	145000
Circle	30ХМА	560mm	3,797	175000
Round forging	30ХМА	560mm	7,08	143000
Round forging	30ХМА	580mm	4,9	143000
Round forging	30ХМА	590×3690mm	8,24	113000
Round forging	30ХМА	590mm	5,64	143000
Circle	30ХМА	60mm	1,294	92000
Circle	30ХМА	620mm	6,71	123000
Round forging	30ХМА	620mm	8,12	143000
Circle	30ХМА	63mm	1,526	118000
Round forging	30ХМА	640mm	8,4	133000
Round forging	30ХМА	650mm	1,07	145000
Round forging	30ХМА	660mm	8,51	113000
Circle	30ХМА	665mm	6,74	123000
Round forging	30ХМА	665mm	1,21	145000
Circle	30ХМА	680mm	1,06	123000
Round forging	30ХМА	680mm	8,58	143000
Circle	30ХМА	700mm	0,365	123000
Round forging	30ХМА	700mm	16,78	143000
Round forging	30ХМА	705×2920mm	8,7	113000
Circle	30ХМА	70mm	1,444	92000
Round forging	30ХМА	720×2690mm	8,51	113000
Round forging	30ХМА	720×2900mm	8,7	113000
Round forging	30ХМА	720×3040mm	8,7	113000
Round forging	30ХМА	720mm	7,12	143000
Round forging	30ХМА	725mm	8,51	113000
Round forging	30ХМА	735×2820mm	8,51	113000
Pipe	30ХМА	73×9mm	2,76	123000
Round forging	30ХМА	740mm	0,7	160000
Round forging	30ХМА	750mm	8,63	143000
Circle	30ХМА	75mm	0,632	92000
Round forging	30ХМА	790mm	15	143000
Round forging	30ХМА	800×1340mm	6,92	113000
Round forging	30ХМА	800mm	8,67	143000
Circle	30ХМА	80mm	0,56	92000
Circle	30ХМА	85mm	1,678	155000
Circle	30ХМА	930mm	5,42	123000
Round forging	30ХМА	930mm	5,22	143000
Circle	30ХМА	95mm	0,301	92000