Steel 40X (40ХА)

06X1 steel 06X1F steel 06XGR steel 06XF steel 07Cr3HNMuA steel Steel 08GDNF (SL-2; 08GDNFL) 08Cr2G2FA steel Steel 08KhMFCH (08KhMFCH) Steel 08KhMHA (08KhMCH) Steel 09GSFA (09GSF) Steel 09N2MFBA (09N2MFBA-A) Steel 09SFA (09SF) 09ХГ2НАБч steel Steel 09KhN2MD (AB2-SH1) Steel 09KhN3MD (AB3) Steel 09KhN4MD (AB4) Steel 10G2 (10G2A) Steel 10GN (10GNA) Steel 10Х1С2М Steel 10Х2ГНМ (10Х2ГНМА) Steel 10Х2М1 (10Х2М1А) 10Х3ГНМЯА steel Steel 10ХН3МД (АБ2-Ш2) Steel 12G1P Steel 12Х2Н4А (ЭИ83) Steel 12Х2НВФА (ЭИ712) Steel 12Х2НВФМА (ЭП506; ЭИ712М) Steel 12Х2НМ1ФА Steel 12Kh2NMFA Steel 12ХГН2МФБДАЮ (VS-4) 12XHNM steel 12CrNiMoV Steel 12KhN steel 12XH2 steel 12XH2A steel Steel 12KhN2MD (AB1) 12KhN3A steel 12XHN3MD steel (AB2; 12XHN3MDF) 12XHN4MBD steel (AB2P) Steel 138 IZ-2 13H2HA steel Steel 13H5A Steel 13Х3НВМ2Ф (DI45; VKS-4) Steel 13ХГМРБ 13CrNi2MoD steel 13CrNi2MoFd steel Steel 13KhGSN1MD Steel 13KhFA (13KhF) Steel 14N2MFD (14N2MFDA) Steel 14Х2ГМР Steel 14Х2Н3МА 14Cr3GMu steel Steel 14ХГ2САФД Steel 14ХГН Steel 14ХГНН2МДАФБ (14ХГНМДАФБ) Steel 14ХГННМДФБРТ (14ХГНМД) Steel 14KhGSN2MA (EP176; DI3A) Steel 14ХН3МА Steel 15G (15G1) 15GUT steel Steel 15H2M (15NM) 15H3MA steel 15X steel 15Kh1SMFB steel 15Cr2Hn2TA steel Steel 15Kh2HN2TRA 15KhA steel 15CrNi2MaFach steel 15CrNi2TA steel (15CrNi2TA) 15KhGNM steel (15KhGNMA) 15KhMFA steel (15KhMF) 15KhN3 steel 15Cr steel 15KhSMFB steel (EP79) 15KhFA steel (15KhF) Steel 16G2 Steel 16Х2Н3МФБАЮ (16Х2Н3МФАБ; VKS7) Steel 16Х3НВФМБ (VKS-5; DI39) Steel 16ХГ (АЦ16ХГ) Steel 16ХГТА (ЭИ274) Steel 16ХН3МА 16KhSN steel Steel 17H3MA 17KhG steel Steel 18Г2ХФЯД Steel 18Kh2H4VA Steel 18Kh2H4MA 18CrNiG Steel 18ХГН2МФБ steel 18KhGT steel 18XH2T steel 18KhN3MA steel 18KhNVA steel Steel 18KhNMFD (18KhNMFDA) Steel 19Х2НВФА (ЭИ763) Steel 19Kh2NMFA Steel 19KhGN Steel 19ХГНМА (19ХГНМ) Steel 19ХГСС Steel 20G (20G1) Steel 20G2 Steel 20G2AF (20G2AFps) 20G2P steel 20GUT steel Steel 20H2M (20NM) Steel 20F (20FA) 20X steel Steel 20X2MA Steel 20X2MFA Steel 20X2H4A Steel 20Х2Н4МФ (20Х2Н4МФА) Steel 20Kh3NMF (20Kh3NMFA) 20XHNM steel 20KhGNMT steel (20KhGNMTA) Steel 20ХГНР 20XHNTR steel 20XGR steel 20KhGSA steel Steel 20ХГСР 20XM steel 20KhN steel Steel 20KhN2M (20KhNM) 20KhN3A steel 20KhN3MFA steel (20KhN3MF) 20KhN4FA steel 20KhNR steel 20KhFA steel (20KhF) Steel 21N5A (EI56) Steel 21Х2НВФА Steel 21Х2НМФА Steel 22KhGNMA (22KhGNM) 22XHNM steel Steel 23G2D Steel 23Х2НВФА (ЭИ659) Steel 23Х2НМФА Steel 23KhN2M Steel 24G2 Steel 24Kh3MF (24Kh3MFA) 24CrNiM Steel Steel 25G (25G2) 50G steel Steel 50G2 50X steel 50KhN steel 5XHNM2 steel 85GF steel AK32 steel AK33 steel AK34 steel AK35 steel AK36 steel AK37 steel AK48 steel AK49 steel AK50 steel Steel 25H Steel 25H3A Steel 25Kh2H4VA Steel 25Х2Н4МА Steel 25ХГ2СФР 25KhGM steel Steel 25KhGNMA (25KhGNM) Steel 25KhGNMT (25KhGNMTA) 25KhGSA steel Steel 25KhGT 25CrM steel Steel 25KhN3 Steel 25KhNTZ Steel 26G1 Steel 26Х1МА (26Х1М) Steel 26Х2НВМБР (KVK-26) Steel 26KhGM Steel 26ХГМФ (26ХГМФА) Steel 26KhMA (26KhM; 25KhM) Steel 27XGR Steel 30G (30G1) 30G1P steel Steel 30G2 30T steel 30X steel Steel 30X2H2VFA Steel 30X2H2VFMA Steel 30Kh2NVA Steel 30Kh2NVFA Steel 30Kh2NVFMA Steel 30Kh2NMA Steel 30Х2НМФА (30Х2НМФ) Steel 30Kh3MF 30Kh3MFSA steel 30Kh3NVA steel 30CGS steel 30KhGSA steel 30KhGT steel 30XM steel 30KhMA steel Steel 30KhN2VA Steel 30KhN2VFA Steel 30KhN2MA (30KhNMA) 30KhN2MFA steel 30KhN3A steel 30KhN3M steel Steel 30KhNMFA (30KhNVFA) 30KhRA steel Steel 30ХСНВФА (ВП30) Steel 32G2 Steel 32G2S Steel 32Х2НВМБР (KVK-32) Steel 33Kh3SNMVFA (SP33; EP613) Steel 33XHN3MA Steel 33HS Steel 34KhN1VA (0KhN1V) Steel 34KhN3M Steel 35G Steel 35G1P Steel 35G2 Steel 35X Steel 35Cr2YuF Steel 35CrNi2 35KhGSA steel Steel 35CrM Steel 35KhN2F Steel 35KHN3MA (35KHN3M) Steel 36G2S Steel 36G2SR Steel 36Х2Н2МФА (36ХН1МФА) Steel 37G2S Steel 37Х2НВМБР (КВК-37) 37KhN3A steel 38Cr2MuA steel (38Cr2MuA) Steel 38Kh2H2VA Steel 38Kh2H2MA (38KhNMA) 38X2H3M steel 38X2HM steel 38Kh2NMF steel 38Kh2Yu (38Kh2YuA) steel 38KhA steel 38KhGM steel 38KhGN steel 38CrNiM steel 38KhGSA steel (38KhGS) Steel 38KhM (42KhM) 38KhMA steel 38KhN3VA steel 38KhN3MA steel 38HS steel Steel 38KhFR (40KhFR) 40G steel Steel 40G2 Steel 40GR (40G1P) Steel 40Kh (40KhA) Steel 40X2H2VA Steel 40X2H2MA Alloy 40Kh3M2FA (USP-40) 40KhGNM steel 40KhGSMA steel 40KhGTR steel Steel 40KhMFA (40KhMF) 40KhN steel Steel 40KhN2VA (40KhNVA) Steel 40KhN2MA (40KhNMA) 40KhR steel 40HS steel 40KhSN2MA steel Steel 40KhFA (40KhF) Steel 42Х2НВМБР (KVK-42) Steel 42Х2НМБР (ABO70Н) Steel 42KhMFA (42KhMF) Steel 44Х2НМБР (ABO70В) 45G steel Steel 45G2 45X steel 45KhN steel 45KhN2MFA steel (45KhNMFA) Steel 47GT 48KhN3M steel

Designation

Name	The value
Designation GOST Cyrillic	40Х
Designation GOST Latin	40X
Transliteration	40H
The chemical elements	40Cr

Name	The value
Designation GOST Cyrillic	40ХА
Designation GOST Latin	40XA
Transliteration	40HA
The chemical elements	40Cr

Description

Steel 40KH is used: for the manufacture of hot rolled plates; axes, shafts, shaft-gears, pistons, rods, crankshaft and Cam shafts, rings, spindles, mandrels, spreader bars, gear rims, bolts, axles, bushings and other upgrade parts high strength; the parts of pipeline fittings from rolled steel; forged blanks and forgings (requires heat treatment: quenching in oil (or water in oil) and tempering in air or in oil); billet flywheels of diesel engines; solid-rolled rings for different purposes; of forgings of shafts of compressors and gas turbines (steel 40ХА); seamless drill pipes used in geological core drilling; blank discs of steam turbines with a working temperature up to 350 °C; billet shafts and solid-forged rotors of stationary and transport steam turbines; of pipes used in aircraft.

Note

Structural steel high-quality chrome.

Standards

Name	Code	Standards
Sectional and shaped rolling	В32	GOST 1051-73, GOST 4543-71, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 10702-78, GOST 14955-77, GOST В 5160-89, OST 1 92049-76, TU 14-1-5414-2001, TU 3-1053-86, TU 108.11-927-87, TU 14-1-1237-75, TU 14-1-2118-77, TU 14-1-2218-77, TU 14-1-2995-80, TU 14-1-3563-83, TU 14-1-5167-92, TU 14-11-245-88, TU 14-1-3011-80, TU 14-1-4032-85, TU 14-1-1271-75, TU 14-1-5228-93, TU 14-136-367-2008
Sheets and stripes	В33	GOST 1577-93, TU 14-1-1409-75, TU 14-1-1579-75, TU 14-1-2506-78, TU 14-1-4043-85, TU 14-1-4118-86, TU 14-1-5036-91, TU 14-1-4118-2004
Pipes steel and connecting parts to them	В62	GOST 7909-56, GOST 8732-78, GOST 8734-75, GOST 9567-75, GOST 23270-89, GOST 24950-81, GOST 8733-87, GOST 8731-87, GOST Р 53383-2009, TU 14-3-1443-86, TU 14-3-439-76, TU 14-3-473-76, TU 14-3Р-51-2001, TU 14-3Р-50-2001, TU 14-3-1654-89
Sheets and stripes	В23	GOST 82-70, GOST 19903-74, GOST 103-2006, GOST 19903-90
Sectional and shaped rolling	В22	GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 8319.0-75, GOST 9234-74, GOST 11474-76, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Metal forming. Forgings	В03	GOST 8479-70, OST 5Р.9125-84, TU 108-1028-81, TU 108-1029-81, TU НЗЛ 342-89, TU 0306.018-80, ST ЦКБА 010-2004
Bulls. Blanks. Slabs	В31	OST 3-1686-90, TU 108.1154-84, TU 14-1-1672-76, TU 14-1-2022-77, TU 14-1-4944-90
Thermal and thermochemical treatment of metals	В04	ST ЦКБА 026-2005

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Ti	Mo	W
TU 108-1029-81	0.36-0.44	≤0.022	≤0.025	0.5-0.8	0.8-1.1	≤0.37	≤0.25	The rest	≤0.25	-	-	-	-
TU 14-1-4118-2004	0.36-0.44	≤0.035	≤0.035	0.5-0.8	0.8-1.1	0.17-0.37	≤0.3	The rest	≤0.3	≤0.05	≤0.03	≤0.15	≤0.2
TU НЗЛ 342-89	0.36-0.44	≤0.025	≤0.025	0.5-0.8	0.8-1.1	0.17-0.37	≤0.25	The rest	≤0.3	-	-	-	-
GOST 10702-78	0.36-0.44	≤0.035	≤0.035	0.5-0.8	0.8-1.1	≤0.2	≤0.3	The rest	≤0.3	≤0.05	≤0.03	≤0.15	≤0.2

Fe is the basis.
According to GOST 4543-71, GOST 10702-78 and TU 14-1-4118-86, the chemical composition is given for steel grade 40X.
According to GOST 4543-71 the content in high-quality steel is regulated: P≤0,025%; S≤0.025%; Сu≤0.30%; in high-grade 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.
TU NZL 342-89 chemical composition is given for steel grade 40XA.
According to TU 108-1028-81 and TU 108-1029-81 the chemical composition is given for steel grade 40ХА. In the workpieces, deviations in the content of the elements indicated in the table are allowed: carbon ± 0.010%, silicon + 0.030%.
In the manufacture of blanks with discs with hub heights from 450 to 650 mm, the content of phosphorus and sulfur in steel should not be more than 0.018% of each; for metal VDP and ELP, the deviation of manganese content +0.10% / - 0.15% is allowed. In the ESR steel, the sulfur content should not be more than 0.015%. When casting steel without evacuation, for the manufacture of disc blanks with a hub height of more than 300 mm, hydrogen content in the metal must be determined. The results of determination of the hydrogen content are not acceptance-delivery and, at the request of the consumer, are to be entered in the procurement certificate.

Mechanical characteristics

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_B, MPa	d₅, %	d₄	d₁₀	y, %	kJ/m², кДж/м²	Brinell hardness number, MPa	HRC
Steel calibrated and calibrated with special surface finish
-	-	-	≥690	≥5	-	-	≥40	-	-	-
-	-	-	-	-	-	-	-	-	≤207	-
-	-	-	-	-	-	-	-	-	≤207	-
Forgings. Hardening + Vacation
500-800	-	≥275	≥530	≥13	-	-	≥30	≥290	156-197	-
300-500	-	≥315	≥570	≥12	-	-	≥30	≥290	167-207	-
500-800	-	≥315	≥570	≥11	-	-	≥30	≥290	167-207	-
300-500	-	≥345	≥590	≥14	-	-	≥38	≥490	174-217	-
100-300	-	≥395	≥615	≥15	-	-	≥40	≥540	187-229	-
300-500	-	≥395	≥615	≥13	-	-	≥35	≥490	187-229	-
100	-	≥395	≥615	≥17	-	-	≥45	≥590	187-229	-
100-300	-	≥440	≥635	≥14	-	-	≥40	≥540	197-235	-
100	-	≥440	≥635	≥16	-	-	≥45	≥590	197-235	-
100-300	-	≥490	≥655	≥13	-	-	≥40	≥540	212-248	-
100	-	≥490	≥655	≥16	-	-	≥45	≥590	212-248	-
Forgings. Normalization
500-800	-	≥245	≥470	≥15	-	-	≥30	≥340	143-179	-
300-500	-	≥275	≥530	≥15	-	-	≥32	≥290	156-197	-
100-300	-	≥315	≥570	≥14	-	-	≥35	≥340	167-207	-
100	-	≥315	≥570	≥17	-	-	≥38	≥390	167-207	-
100-300	-	≥345	≥590	≥17	-	-	≥40	≥540	174-217	-
100	-	≥345	≥590	≥18	-	-	≥45	≥590	174-217	-
Forged billet shafts of compressors and gas turbines, heat-treated in the delivery condition on the other NZL 342-89 (longitudinal samples, in the column of the delivery condition specified strength)
≤500	-	≥343	≥568	≥17	-	-	≥35	≥441	-	-
Seamless hot deformed tubes in the delivery condition
	-	-	≥657	≥9	-	-	-	-	≤269	-
Forgings. Quenching in oil or water from 840-860 °C + Vacation at 580-650 °C, cooling in water or air
101-200	-	≥490	≥655	≥15	-	-	≥45	≥590	212-248	-
Hot-rolled steel and hot rolled with special surface heat-treated
	-	-	-	-	-	-	-	-	≤179	-
Forgings. Hardening in water from 850 °C + Vacation
-	200	≥1560	≥1760	≥8	-	-	≥35	≥290	-	-
Billet shafts and rotors of steam turbines on the other 108-1029-81 (in the delivery condition specified strength and direction and place the cuttings sample)
-	-	≥343	≥569	≥17	-	-	-	≥390	-	-
A sample with diameter 10 mm, length 50 mm forged and annealed. The rate of deformation of 5 mm/min strain rate of 0.002 1/s
-	-	≥140	≥175	≥33	-	-	≥78	-	-	-
Forgings. Quenching in oil or water from 840-860 °C + Vacation at 580-650 °C, cooling in water or air
201-300	-	≥440	≥635	≥14	-	-	≥40	≥540	197-235	-
Forgings. Hardening in water from 850 °C + Vacation
-	300	≥1390	≥1610	≥8	-	-	≥35	≥200	-	-
Billet shafts and rotors of steam turbines on the other 108-1029-81 (in the delivery condition specified strength and direction and place the cuttings sample)
-	-	≥324	≥540	≥13	-	-	-	≥390	-	-
A sample with diameter 10 mm, length 50 mm forged and annealed. The rate of deformation of 5 mm/min strain rate of 0.002 1/s
-	-	≥54	≥98	≥59	-	-	≥98	-	-	-
Blank pieces of pipe fittings according to ST CKBA 026-2005. Quenching in oil (or water in oil) from 840-870 °C (exposure for 2.5-4.0 hours depending on thickness and weight of the workpiece) + Vacation, air cooling or oil
120	600-620	≥490	≥655	≥13	-	-	≥40	≥490	212-248	-
Forgings. Quenching in oil or water from 840-860 °C + Vacation at 580-650 °C, cooling in water or air
301-500	-	≥345	≥590	≥14	-	-	≥38	≥490	174-217	-
Forgings. Hardening in water from 850 °C + Vacation
-	400	≥1180	≥1320	≥9	-	-	≥40	≥490	-	-
A sample with diameter 10 mm, length 50 mm forged and annealed. The rate of deformation of 5 mm/min strain rate of 0.002 1/s
-	-	≥41	≥69	≥65	-	-	≥100	-	-	-
Blank pieces of pipe fittings according to ST CKBA 026-2005. Quenching in oil (or water in oil) from 840-870 °C (exposure for 2.5-4.0 hours depending on thickness and weight of the workpiece) + Vacation, air cooling or oil
200	620-660	≥440	≥635	≥14	-	-	≥40	≥539	197-235	-
Forgings. Hardening in water from 850 °C + Vacation
-	500	≥910	≥1150	≥11	-	-	≥49	≥690	-	-
A sample with diameter 10 mm, length 50 mm forged and annealed. The rate of deformation of 5 mm/min strain rate of 0.002 1/s
-	-	≥24	≥43	≥68	-	-	≥100	-	-	-
Blank pieces of pipe fittings according to ST CKBA 026-2005. Quenching in oil (or water in oil) from 840-870 °C (exposure for 2.5-4.0 hours depending on thickness and weight of the workpiece) + Vacation, air cooling or oil
25	130-200	≥1274	≥1470	≥7	-	-	≥25	≥294	-	46.4-53.1
Forgings. Hardening in water from 850 °C + Vacation
-	600	≥720	≥860	≥14	-	-	≥60	≥1470	-	-
A sample with diameter 10 mm, length 50 mm forged and annealed. The rate of deformation of 5 mm/min strain rate of 0.002 1/s
-	-	≥11	≥26	≥68	-	-	≥100	-	-	-
Blank pieces of pipe fittings according to ST CKBA 026-2005. Quenching in oil (or water in oil) from 840-870 °C (exposure for 2.5-4.0 hours depending on thickness and weight of the workpiece) + Vacation, air cooling or oil
30	400-420	≥880	≥1078	≥7	-	-	≥35	≥392	-	36.7-43.5
A sample with diameter 10 mm, length 50 mm forged and annealed. The rate of deformation of 5 mm/min strain rate of 0.002 1/s
-	-	≥11	≥24	≥70	-	-	≥100	-	-	-
Blank pieces of pipe fittings according to ST CKBA 026-2005. Quenching in oil (or water in oil) from 840-870 °C (exposure for 2.5-4.0 hours depending on thickness and weight of the workpiece) + Vacation, air cooling or oil
30	500-560	≥785	≥930	≥12	-	-	≥40	≥588	293-331	-
Forgings. Hardened in oil from 830 °C to + Vacation at 550 °C
-	-	≥700	≥880	≥15	-	-	≥42	≥1180	-	-
Blank pieces of pipe fittings according to ST CKBA 026-2005. Quenching in oil (or water in oil) from 840-870 °C (exposure for 2.5-4.0 hours depending on thickness and weight of the workpiece) + Vacation, air cooling or oil
50	560-580	≥685	≥835	≥13	-	-	≥42	≥588	262-311	-
Forgings. Hardened in oil from 830 °C to + Vacation at 550 °C
-	-	≥680	≥870	≥17	-	-	≥58	-	-	-
Blank pieces of pipe fittings according to ST CKBA 026-2005. Quenching in oil (or water in oil) from 840-870 °C (exposure for 2.5-4.0 hours depending on thickness and weight of the workpiece) + Vacation, air cooling or oil
80	580-600	≥540	≥685	≥15	-	-	≥45	≥588	223-262	-
Forgings. Hardened in oil from 830 °C to + Vacation at 550 °C
-	-	≥610	≥690	≥18	-	-	≥68	≥980	-	-
Of the workpiece. Quenching in oil from 860 °C to + Leave at 500 °C, cooling in water
	-	≥320	≥570	≥17	-	-	≥35	≥400	-	-
Forgings. Hardened in oil from 830 °C to + Vacation at 550 °C
-	-	≥430	≥490	≥21	-	-	≥80	≥780	-	-
Of the workpiece. Quenching in oil from 860 °C to + Leave at 500 °C, cooling in water
≤25	-	≥785	≥980	≥10	-	-	≥45	≥590	-	-
28-55	-	≥800	≥940	≥13	-	-	≥55	≥850	-	-
Forged blanks of disks of steam turbines on the other 108-1028-81 (in the delivery condition specified strength; in cross-section, if regulated, see the recommended height of the hub)
-	-	314-540	≥559	≥17	-	-	≥40	≥390	-	-
-	-	392-589	≥589	≥17	-	-	≥40	≥390	-	-
Ring forged in OST 1 92049-76. Quenching in oil with 845-875 °C + Vacation at 450-550 °C, cooling in water or oil
25	-	≥745	≥930	≥7.5	-	-	≥36	≥441	-	-
Flats on the other 14-1-4118-2004
	-	-	590-780	-	≥10	≥12	-	-	-	-
Seamless cold-worked tubes in the delivery condition heat-treated (NV - wall > 10 mm)
	-	-	≥618	≥14	-	-	-	-	≤217	-

Description mechanical marks

Name	Description
Section	Section
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_B	Limit short-term strength
d₅	Elongation after rupture
d₄	Elongation after rupture
d₁₀	Elongation after rupture
y	The relative narrowing
kJ/m²	Toughness
HRC	Rockwell hardness (indenter diamond spheroconical)

Physical characteristics

Temperature	Е, ГПа	G, ГПа	r, кг/м3	l, Вт/(м · °С)	R, НОм · м	a, 10-6 1/°С	С, Дж/(кг · °С)
0	214	85	7850	41	278	-	-
20	214	-	7820	-	210	-	-
100	211	83	7800	40	324	118	466
200	206	81	7800	38	405	122	508
300	203	78	7740	36	555	132	529
400	185	71	7700	34	717	137	563
500	176	68	7650	33	880	141	592
600	164	63	7630	31	1100	146	622
700	143	55	7590	30	1330	146	634
800	132	50	7610	27	1100	148	634
900	-	-	7560	267	1140	-	-
1000	-	-	7510	28	1170	12	664
1100	-	-	7470	288	120	-	-
1200	-	-	7430	-	1230	-	-

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	Difficult weldability. Welding methods: SMAW, ESW. Necessary preheating and subsequent heat treatment. CCC - a necessary subsequent heat treatment.
Propensity to temper brittleness	Inclined.
Forging temperature	Start - 1250 °C, the end - of 800 °C. the cross Sections up to 350 mm cooled in air.
Flock-sensitive sensitivity	Sensitive.

Steel 40X (40ХА)

Designation

Description

Note

Standards

Chemical composition

Mechanical characteristics

Description mechanical marks

Physical characteristics

A description of the physical symbols

Technological properties

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Steel 40X (40ХА)

Designation

Description

Note

Standards

Chemical composition

Mechanical characteristics

Description mechanical marks

Physical characteristics

A description of the physical symbols

Technological properties

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