Steel 50

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 50

Steel 50: a brand of steels and alloys. Below is a systematized information on the purpose, chemical composition, types of supplies, substitutes, temperature of critical points, physical, mechanical, technological and casting properties for the Steel 50 grade.

General steel 50

Substitute brand

steel: 45, 50G, 50G2, 55.

Delivery type

Long products, including shaped: GOST 1050−74, GOST 2590−71, GOST 2591−71, GOST 2879−69, GOST 8509−86, GOST 8510−86, GOST 8239−72, GOST 8240−72, GOST 10702 -78. Calibrated bar GOST 7414−75, GOST 8559−75, GOST 8560−78, GOST 10702−78. Polished bar and silver bar GOST 14955−77, GOST 10702−78. Thick sheet GOST 1577−81, GOST 19903−74. Thin sheet GOST 16523−70. Tape GOST 10234−77, GOST 1530−78, GOST 2284−79, GOST 21996−76. Strip GOST 1577−81, GOST 103−76, GOST 82−70. Wire GOST 17305−71. Forgings and forged billets GOST 8479−70, GOST 1131−71. Rolls OST 24.013.21−85, GOST 5399−69, OST 24.013.04−83.

Application

after normalization with tempering and quenching with tempering — gear wheels, rolling rolls, rods, heavily loaded shafts, axles, tires, lightly loaded springs and springs, plowshares, track pins, gearbox clutches, nozzle bodies and other parts operating on friction.

Chemical composition of steel 50

Chemical element	%
Silicon (Si)	0.17−0.37
Manganese (Mn)	0.50−0.80
Copper (Cu), no more	0.25
Arsenic (As), no more	0.08
Nickel (Ni), no more	0.25
Sulfur (S), no more	0.040
Carbon (C)	0.47−0.55
Phosphorus (P), no more	0.035
Chromium (Cr), no more	0.25

Mechanical properties of steel 50

Mechanical properties at elevated temperatures

test t, ° C	σ _0.2, MPa	σ _B, MPa	δ ₅ ,%	ψ,%
Sample 10 mm in diameter, 50 mm long, deformed. Deformation rate 5 mm / min. Strain rate 0.002 1 / s.
700	87	115	39	97
800	45	81	45	100
900	sixteen	50	43	100
1000	eleven	36	35	100
1100	8	28	41	100
1200	8	22	49	100

Mechanical properties of rolled products

Heat treatment, delivery condition	Section, mm	σ _B, MPa	δ ₅ ,%	δ ₄ ,%	ψ,%
Hot rolled steel, forged, calibrated and silver grade 2 after normalization	25	630	fourteen		40
Calibrated steel of the 5th category after work-hardening.		660	6		thirty
Calibrated steel grade 5 after annealing or high tempering		560	12		40
Annealed or highly tempered sheets	80	580	17
Hot rolled sheet	<2	540−720		12
Hot rolled sheet	2−3.9	540−720		thirteen
Cold rolled sheet	<2	540−720		thirteen
Cold rolled sheet	2−3.9	540−720		fourteen

Mechanical properties of forgings

Heat treatment, delivery condition	Section, mm	σ _0.2, MPa	σ _B, MPa	δ ₅ ,%	ψ,%	KCU, J / m ²	HB
Normalization
KP 275	100−300	275	530	17	38	34	156−197
KP 315	<100	315	570	17	38	39	167−207

Mechanical properties depending on the tempering temperature

vacation t, ° С	σ _0.2, MPa	σ _B, MPa	δ ₅ ,%	ψ,%	KCU, J / m ²	HB
Workpiece diameter 40 mm. Hardening 840 ° C, water
400	600	830	fourteen	50	64	240
500	530	760	fifteen	56	88	215
600	450	680	17	64	139	190
Workpiece diameter 60 mm. Hardening 840 ° C, water
400	550	770	fourteen	48	56	217
500	490	710	fifteen	55	70	200
600	420	630	19	63	108	180

Mechanical properties depending on the section

Section, mm	σ _0.2, MPa	σ _B, MPa	δ ₅ ,%	ψ,%	KCU, J / m ²
Hardening 850 ° C, water. Vacation 580−600 ° С, air.
50	530	760	fifteen	50	59
120	470	740	thirteen	40	39
160	450	740	thirteen	40	39
200	430	720	thirteen	35	20
Normalization 830−860 ° C, air. Vacation 580−650 ° C, air or oven.
101−200	305	610	sixteen	38	34
201−300	305	610	fourteen	33	29
301−500	295	590	12	thirty	25
501−800	285	570	12	28	20

Technological properties of steel 50

Forging temperature

Beginning 1250, end 800. Sections up to 400 mm are cooled in air.

Weldability

Hard to weld. Welding methods for RDS and KTS. Heating and subsequent heat treatment is recommended.

Machinability by cutting

In the hot-rolled state at HB 196−202 and σ _B = 640 MPa, K _{υ tv.spl.} = 1,0 and K _{υ b.st.} = 0.7.

Tendency to release ability

Not inclined.

Flock sensitivity

Insensitive.

Temperature of critical points of steel 50

Critical point	° C
Ac1	725
Ac3	760
Ar3	750
Ar1	690
Mn	300

Impact strength of steel 50

Impact strength, KCU, J / cm ²

Delivery status, heat treatment	+20	-20	-50	-60
Quenching 850 С, water. Vacation 600 С	78	66	51
Hardening 850 С, oil. Vacation 450 С	49			37

Endurance limit steel 50

σ _-1, MPa	τ _-1, MPa	n	σ _B, MPa	σ _0.2, MPa	Heat treatment, steel condition
421		1E + 6	840		Hardening 785 C, oil. Vacation 425 S.
279	167				Normalization 850 C. Vacation 630 C.
468			870	560	Hardening 785 C. Oil. Vacation 315 C.

Hardenability of steel 50

Hardening 840 C. Hardness for strips of hardenability HRCe.

Distance from the end, mm / HRC _e
1.5	3	4.5	6	7.5	nine	fifteen	eighteen	21
46.5−57	40.5−53.5	29.5−50.5	26−40.5	24−35	23−30.5	20−29	28.5	27

Heat treatment	Crit. Diam. in water, mm	Crit. Diam. in oil, mm	Crete. hardness, HRCэ
Quenching 850 C.		ten	46−51
Tempering 840 C.	20		38−58

Physical properties of steel 50

Test temperature, ° С	20	100	200	300	400	500	600	700	800	900
Normal elastic modulus, E, GPa	216	213	207	200	180	171	154	136	123
Torsional shear elastic modulus G, GPa	88	87	84	81	71	67	61	54	49
Density of steel, pn, kg / m ³	7810
Thermal conductivity coefficient W / (m ° С)	48	48	47	44	41	38	35	31	27
Ud. electrical resistance (p, Nom. m)	272
Test temperature, ° С	20−100	20−200	20−300	20−400	20−500	20−600	20−700	20−800	20−900	20−1000
Linear expansion coefficient (a, 10−6 1 / ° С)	11.2	12.0	12.8	13.4	13.9	14.2	14.5	13.4
Specific heat (C, J / (kg ° C))	487	500	517	533	559	584

Steel 50

Description

Steel 50

General steel 50

Chemical composition of steel 50

Mechanical properties of steel 50

Mechanical properties at elevated temperatures

Mechanical properties of rolled products

Mechanical properties of forgings

Mechanical properties depending on the tempering temperature

Mechanical properties depending on the section

Technological properties of steel 50

Temperature of critical points of steel 50

Impact strength of steel 50

Endurance limit steel 50

Hardenability of steel 50

Physical properties of steel 50

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Steel 50

Description

Steel 50

General steel 50

Chemical composition of steel 50

Mechanical properties of steel 50

Mechanical properties at elevated temperatures

Mechanical properties of rolled products

Mechanical properties of forgings

Mechanical properties depending on the tempering temperature

Mechanical properties depending on the section

Technological properties of steel 50

Temperature of critical points of steel 50

Impact strength of steel 50

Endurance limit steel 50

Hardenability of steel 50

Physical properties of steel 50

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