Steel 30ХН2МА

VSt6ps VSt5sp VSt3kp VSt4kp VSt6sp VSt2kp Vst4ps St0 VSt2ps VSt3ps VSt5ps VSt2sp VSt3sp 18К 08ps 10ps 15К 18kp 20ps 35 55 05kp 08Ю 15kp 20 (20А) 22К 40 58 (55ПП) 08 10 (Art. 10) 12К 15pc 20К 25 45 60 08kp 10kp 15 16К 20kp 30 50 0cB 60С2 60C2XA 50XFA 60C2A 60C2CHFA 65C2VA 85 55XGR 65 70C3A 55С2 60Г 60C2H2A 65Г 70 75 SHKH15 SHKH15SG SH4 А12 А20 A40G А30 10XNDP 14G2AF 15G2AFDps 17GS 18G2AFps 09Г2 10G2BD 10ХСНД 12GS 15G2SFD 16GS 35GS 14CGS 15ХСНД 20ХГ2Ц 09G2S 10G2S1 14Г2 16G2AF 17G1S 25G2S 10Г2 14X2GMR 15KHF 18CR2N4MA 20Г 20X2H4A 20XGR 20KHN2M (20KHNM) 30Г 30CGS 30CRNI2MA 34CRNI3M 35Х 38CR2N3M 38XA 38CMA 3CR3M3F 40Х 40XFA 45CRN 50Г2 12XH2 15Х 20KHGSA 20XHN3A 25CGSA 30KHGSA 30CRNI2MOVA 33HS 35KHN1M2FA 38CR2NM 40Г 40CR2H2MA 40CRN 45Г 45CRNI2MOVA 50Х 12XH2A 18CGT 20CRNR 20CRNI4FA 25CGT 30Х 30CGSN2A 30KHN3A 34CRNI1M 35Г 36CR2NI2MOVA 38KH2NMF 38CRN 38CRNI3MA 40Г2 40CRNI2MA 45Г2 47GT 50XH 12CR2N4A 12XHN3A 15Г 18CR2N4VA 20Х 20XH 20XNR 30CGT 30ХН3М2ФА 35Г2 35CGSA 38CR2H2MA 38CRNI3MOVA 40HS 45Х 50Г

Description

Steel 30ХН2МА

Steel 30ХН2МА: brand of steels and alloys. Below is the systematized information on the purpose, chemical composition, types of supplies, substitutes, temperature of critical points, physical, mechanical, technological and casting properties for the grade — Steel 30XH2MA.

General information about steel 30ХН2МА

Delivery type

Circle 30xn2ma, long products, including shaped: GOST 4543−71, GOST 2590−71, GOST 2591−71, GOST 2879−69. Calibrated bar GOST 7417−75, GOST 8559−75, GOST 8560−78, GOST 1051−73. Polished bar and silver bar GOST 14955−77. Strip GOST 103−76. Forgings and forged billets GOST 1133−71, GOST 8479−70.

Application

Crankshafts, connecting rods, critical bolts, studs, discs, sprockets and other critical parts operating under difficult loading conditions at normal, low and high temperatures.

Chemical composition of steel 30ХН2МА

Chemical element	%
Silicon (Si)	0.17−0.37
Manganese (Mn)	0.30−0.60
Copper (Cu), no more	0.30
Molybdenum (Mo)	0.20−0.30
Nickel (Ni)	1.25−1.65
Sulfur (S), no more	0.025
Carbon (C)	0.27−0.34
Phosphorus (P), no more	0.025
Chromium (Cr)	0.60−0.90

Mechanical properties of steel 30ХН2МА

Section, mm	σ _0.2, MPa	σ _B, MPa	δ ₅ ,%	ψ,%	KCU, J / m ²
Bar. Hardening 860 ° C, oil. Vacation 530 ° С, air.
fifteen	785	980	ten	45	78
Forgings. Hardening. Vacation.
100−300	540	685	thirteen	40	49

Mechanical properties at elevated temperatures

test t, ° C	σ _0.2, MPa	σ _B, MPa	δ ₅ ,%	ψ,%	KCU, J / m ²
Forgings with a section of 80 mm. Hardening. High vacation.
20	1100	1200	fifteen	60	125
200	950	1100	sixteen	63	120
400	800	950	20	75	100
500	700	800	20	80	70
600	450	540	thirty	93	105

Mechanical properties depending on the tempering temperature

vacation t, ° С	σ _0.2, MPa	σ _B, MPa	δ ₅ ,%	ψ,%	KCU, J / m ²
Hardening 850 ° С, oil. Exposure on vacation 1 h.
200	1550	1750	ten	60	125
300	1450	1600	thirteen	62	90
400	1300	1400	eleven	60	100
500	1100	1200	fifteen	65	125
600	900	1000	19	70	200

Mechanical properties depending on the section

Section, mm	σ _0.2, MPa	σ _B, MPa	δ ₅ ,%	ψ,%	KCU, J / m ²	HB
Rods. Normalization 860 ° C, water. Vacation 680 ° C. Hardening 850 ° С, oil. Vacation 600−620 ° С, water.
40	900	1000	12	62	150	300
80	800	930	thirteen	63	140	275
120	700	850	fifteen	62	120	250
160	720	850	fifteen	57	95	245
200	600	800	sixteen	55	80	240
240	600	800	17	53	75	230

Mechanical properties additional data

σ _0.2, MPa	σ _B, MPa	ψ,%	KCU, J / m ²	HB
after quenching at 1150 ° C and HTMO. HTMO: 500 ° С, deformation 50%, oil. Vacation 200 ° С, 4 h.
1760	2050	20	36	540
after quenching at 1150 ° C and HTMO. NTMO: 700 ° C, deformation 50%, oil. Vacation 200 ° С, 4 h.
1620	1860	25	35	500
after quenching at 1150 ° C and HTMO. НТМО: 900 ° С, deformation 50%, oil. Vacation 200 ° С, 4 h.
1550	1760	40	40	460

Technological properties of steel 30ХН2МА

Forging temperature

Early 1200, late 800. Slow cooling. For large sections, anti-flake treatment is carried out.

Temperature of critical points of steel 30ХН2МА

Critical point	° C
Ac1	730
Ac3	775
Mn	340

Endurance limit of steel 30ХН2МА

σ _-1, MPa	τ _-1, MPa	n	σ _B, MPa	Heat treatment, steel condition
456	230	1E + 7	1060	Hardening 850 C, holding 1.5 h, oil. Vacation 560 С, exposure 2 h. Delta10 = 9%, psi = 55%, KCU = 87 J / cm2
500		1E + 7	1800	Hardening 850 C, holding 1.5 h, oil. Vacation 560 С, exposure 2 h. Delta10 = 6%, psi = 45%, KCU = 33 J / cm2

Hardenability of steel 30ХН2МА

Distance from the end, mm / HRC _e

Heat treatment	Crit. Diam. in oil, mm	Crete. hardness, HRCэ
Hardening 850 С, oil.	75	49−56

Physical properties of steel 30ХН2МА

Test temperature, ° С	20	100	200	300	400	500	600	700	800	900
Normal elastic modulus, E, GPa	204	201	194	186	182	171	159
Torsional shear elastic modulus G, GPa	80	79	76	72	69	67	61
Density of steel, pn, kg / m ³	7850

Steel 30ХН2МА

Description