Steel 40H13 (4Х13)

Designation

Name	The value
Designation GOST Cyrillic	40Х13
Designation GOST Latin	40X13
Transliteration	40H13
By chemical elements	40Cr13

Name	The value
Designation GOST Cyrillic	4Х13
Designation GOST Latin	4X13
Transliteration	4H13
By chemical elements	4Cr13

Description

40X13 steel is used: for the manufacture of cutting, measuring tools, springs, carburetor needle, household items, valve plates, compressors and other parts operating at temperatures up to 400−450 °C; parts operating in corrosive environments; the various parts of the aircraft industry (parts with high hardness, wear working at high mechanical loading and under conditions of relaxation (stainless springs, bolts, finger, fittings, axles and bearings of the instrument).

Note

Steel chromium corrosion-resistant martensitic class.
Steel is used after quenching and low tempering with ground and polished surface has a high hardness.
Because of the tendency of steel to spontaneous cracking immediately after quenching the part is subjected to release.

Standards

Name	Code	Standards
Sheets and strips	В23	GOST 103-2006
Bars and shapes	В22	GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Wire, steel, alloy	В73	GOST 18143-72, TU 14-173-6-91
Sheets and strips	В33	GOST 4405-75, GOST 5582-75, TU 14-1-1422-75, TU 14-1-2186-77
Classification, nomenclature and General rules	В30	GOST 5632-72
Bars and shapes	В32	GOST 5949-75, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, GOST 18907-73, TU 14-1-2972-80, TU 14-1-377-72, TU 14-1-3957-85, TU 14-11-245-88
Classification, nomenclature and General rules	В20	OST 1 90005-91
Blanks. Of the workpiece. Slabs	В21	OST 1 90176-75
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, OST 95-10-72
Processing of metals by pressure. Forgings	В03	OST 5Р.9125-84, TU 14-1-1530-75
Thermal and thermochemical treatment of metals	В04	STP 26.260.484-2004

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Ti	Mo	W
TU 14-1-2186-77	0.35-0.44	≤0.025	≤0.03	≤0.6	12-14	≤0.6	≤0.5	Rest	≤0.3	≤0.2	≤0.2	≤0.3	≤0.2
GOST 5632-72	0.36-0.45	≤0.025	≤0.03	≤0.8	12-14	≤0.8	≤0.6	Rest	≤0.3	≤0.2	≤0.2	≤0.3	≤0.2

Fe is the basis.
According to TU 14-1-2186-77 for steel smelted with electroslag remelting the content of S ≤ 0.015%.

Mechanical properties

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d₄	d	y, %	KCU, kJ/m²	HB, MPa	HRC
Rolled steel. Quenching in oil from 1000 °C + Vacation
-	200	≥1620	≥1840	≥1	-	-	≥2	-	-	≥52
The sample deformed with a diameter of 6 mm and a length of 30 mm. the Rate of deformation of 16 mm/min strain Rate of 0.009 1/s
-	-	≥120	≥130	≥64	-	-	≥96	-	-	-
Quenching in oil from 1050 °C to + Vacation 550 °C (exposure for 10 h) (provided the temperature and duration of heat exposure)
-	-	≥870	≥1080	≥11	-	-	≥43	-	-	-
Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91
-	-	-	-	-	-	-	-	-	-	50-56
Billet (forgings) OST 95-10-72. Quenching in oil 980-1050 °C + Vacation at 200-370 °C, cooling in oil or air (sample)
≤200	-	-	-	-	-	-	-	-	-	48-56
Rolled steel. Quenching in oil from 1000 °C + Vacation
-	350	≥1450	≥1710	≥11	-	-	≥22	-	-	≥50
The sample deformed with a diameter of 6 mm and a length of 30 mm. the Rate of deformation of 16 mm/min strain Rate of 0.009 1/s
-	-	≥100	≥125	≥68	-	-	≥92	-	-	-
Quenching in oil from 1050 °C to + Vacation 550 °C (exposure for 10 h) (provided the temperature and duration of heat exposure)
-	-	≥900	≥1080	≥13	-	-	≥42	-	-	-
Rolled steel. Quenching in oil from 1000 °C + Vacation
-	500	≥1390	≥1680	≥7	-	-	≥9	-	-	≥51
The sample deformed with a diameter of 6 mm and a length of 30 mm. the Rate of deformation of 16 mm/min strain Rate of 0.009 1/s
-	-	≥74	≥90	≥84	-	-	≥96	-	-	-
Quenching in oil from 1050 °C to + Vacation 550 °C (exposure for 10 h) (provided the temperature and duration of heat exposure)
-	-	≥940	≥1140	≥13	-	-	≥48	-	-	-
Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Annealing or vacation at 740-800 °C
-	-	-	≥550	≥15	-	-	-	-	-	-
The sample deformed with a diameter of 6 mm and a length of 30 mm. the Rate of deformation of 16 mm/min strain Rate of 0.009 1/s
-	-	≥51	≥75	≥70	-	-	≥98	-	-	-
Rolled steel. Quenching in oil from 1050 °C to + Leave 600 °C (extract 3 hours) (provided the temperature and duration of heat exposure)
-	-	≥840	≥1000	≥13	-	-	25-33	-	-	-
Samples for mahismati. Quenching in oil from 1000-1050 °C in air + Vacation at 200-300 °C, cooling in air or in oil
-	-	-	-	-	-	-	-	-	-	52
Forgings. Quenching in oil 1000-1050 °C + vacation at 620-680 °C, air cooling
≤300	-	-	-	-	-	-	-	-	269-302	-
The sample deformed with a diameter of 6 mm and a length of 30 mm. the Rate of deformation of 16 mm/min strain Rate of 0.009 1/s
-	-	≥45	≥57	≥73	-	-	≥100	-	-	-
Rolled steel. Quenching in oil from 1050 °C to + Leave 600 °C (extract 3 hours) (provided the temperature and duration of heat exposure)
-	-	≥820	≥1080	≥12	-	-	28-31	-	-	-
The wire is heat-treated in the delivery condition according to GOST 18143-72 (elongation, % at rated sample length of 100 mm is specified for the wire of the 1st class in brackets are for 2nd class)
1-6	-	-	640-880	-	-	≥14 (≥10)	-	-	-	-
The sample deformed with a diameter of 6 mm and a length of 30 mm. the Rate of deformation of 16 mm/min strain Rate of 0.009 1/s
-	-	≥43	≥53	≥60	-	-	≥98	-	-	-
Rolled steel. Quenching in oil from 1050 °C to + Leave 600 °C (extract 3 hours) (provided the temperature and duration of heat exposure)
-	-	≥890	≥1120	≥13	-	-	≥32	-	-	-
Rental in the state of delivery. Annealing or vacation at 740-800 °C
1-6	-	-	590-880	-	≥10	-	-	-	-	-
The sample deformed with a diameter of 6 mm and a length of 30 mm. the Rate of deformation of 16 mm/min strain Rate of 0.009 1/s
-	-	≥34	≥40	≥64	-	-	≥100	-	-	-
Rolled steel. Quenching in oil from 1050 °C to + Leave 530 °C (exposure for 6 h) (provided the temperature and duration of heat exposure)
-	-	≥880	≥1060	≥14	-	-	≥46	-	-	-
Rental in the state of delivery. Annealing or vacation at 740-800 °C
5	-	-	-	-	-	-	-	-	143-229	-
The sample deformed with a diameter of 6 mm and a length of 30 mm. the Rate of deformation of 16 mm/min strain Rate of 0.009 1/s
-	-	≥27	≥35	≥60	-	-	≥100	-	-	-
Rolled steel. Quenching in oil from 1050 °C to + Leave 530 °C (exposure for 6 h) (provided the temperature and duration of heat exposure)
-	-	≥930	≥1100	≥13	-	-	≥47	-	-	-
Bars of polished, processed on a given strength (TS) according to GOST 18907-73
1-30	-	-	590-810	-	-	≥10	-	-	-	-
Rolled steel. Quenching in oil from 1000 °C + Vacation at 700 °C
-	-	≥500	≥780	≥35	-	-	≥59	-	≥217	-
Rolled steel. Quenching in oil from 1050 °C to + Leave 530 °C (exposure for 6 h) (provided the temperature and duration of heat exposure)
-	-	≥750	≥990	≥14	-	-	≥37	-	-	-
Bars hot rolled and forged at STP 26.260.484-2004. Quenching in oil 1000-1050 °C + Vacation, air cooling
	250-300	≥1500	≥1800	≥10	-	-	≥30	≥490	-	-
Rolled steel. Annealing in air 1030-1050 °C to + Leave at 530 °C (exposure 2 hours), air cooling
-	-	≥1420	≥1670	≥6	-	-	≥34	-	-	-
Bars hot rolled and forged at STP 26.260.484-2004. Quenching in oil 1000-1050 °C + Vacation, air cooling
	700-750	≥650	≥900	≥12	-	-	≥45	≥490	-	-
Rolled steel. Annealing in air 1030-1050 °C to + Leave at 530 °C (exposure 2 hours), air cooling
-	-	≥1310	≥1360	≥7	-	-	≥36	-	-	-
Rolled steel. Quenching in oil with 1030-1050 °C + Heat to 550 °C (excerpt 10 hours), air cooling
≤60	-	≥960	≥1165	≥13	-	-	≥47.5	-	-	-
Rolled steel. Annealing in air 1030-1050 °C to + Leave at 530 °C (exposure 2 hours), air cooling
-	-	≥960	≥1130	≥12	-	-	≥45	-	-	-
Rolled steel. Annealing in air 1030-1050 °C + Heating to 530 °C (exposure 2 hours), air cooling
≤60	-	≥1145	≥1700	≥5.5	-	-	≥33.5	-	-	-
Rolled steel. Annealing in air 1030-1050 °C to + Leave at 530 °C (exposure 2 hours), air cooling
-	-	≥980	≥1070	≥12	-	-	≥49	-	-	-
Forming at OST 1 90176-75. Quenching in oil 1050-1100 °C + Vacation at 200-300 °C, cooling in air or in oil
	-	-	-	-	-	-	-	-	-	≥50
Rolled steel. Annealing in air 1050 °C + Vacation at 600 °C (extract 3 hours)
-	-	≥890	≥1120	≥13	-	-	≥32	-	-	-
-	-	≥810	≥940	≥11	-	-	≥40	-	-	-
-	-	≥710	≥900	≥10	-	-	≥39	-	-	-
-	-	≥670	≥780	≥12	-	-	≥45	-	-	-
-	-	≥470	≥520	≥20	-	-	≥77	-	-	-
-	-	≥255	≥300	≥21	-	-	≥84	-	-	-
Rolled steel. Annealing in air 1050 °C + Vacation at 650 °C (extract 3 hours) At 20 °C NV=277-286
-	-	≥710	≥930	≥14	-	-	≥42	-	-	-
-	-	≥540	≥640	≥15	-	-	≥44	-	-	-
-	-	-	≥540	≥18	-	-	≥67	-	-	-

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
d₄	Elongation after rupture
d	Elongation after rupture
y	The relative narrowing
KCU	Toughness
HB	Brinell hardness number
HRC	Rockwell hardness (indenter diamond spheroconical)

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	214	7650	25	-	-	-
20	218	7650	25	590	-	461
100	208	7630	26	786	107	452
200	202	7600	27	830	115	477
300	194	7570	28	890	119	502
400	185	7540	29	950	122	528
500	173	7510	29	998	125	553
600	160	7480	29	1046	128	578
700	148	7450	28	1122	138	620
800	140	7420	28	1180	13	825
900	-	-	29	1160	-	666
1000	-	-	-	-	132	-
1100	-	-	-	-	-	691

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
С	Specific heat

Technological properties

Name	The value
Weldability	Does not apply to welded structures.
The temperature of forging	Start - 1200 °C, the end - 850 °C. the cross Sections up to 200 mm are subjected to low temperature annealing.
Machinability	In the hardened and tempered condition, when blower SB 340 and HB=730 MPa Kn TV.SPL.=0,6 Kn b.St.=0,4.
Features of heat treatment	Steel products can be subjected to hardening, leave, annealing. The quenching and tempering of the products is done to achieve: a) maximum corrosion resistance; b) the specified level of mechanical properties. Hardening of steel products is carried out in oil with 1000-1050 °C. the holding Time at the heating for hardening to products with a wall thickness or diameter up to 10 mm - 20 min., above 10mm-20 min + 1 min per 1 mm maximum thickness. Steel sensitive to cracking, so heating of thick-walled and complex configuration of products for hardening start with 500-650 °C and are slowly to 800 °C, after equalizing the temperature of the heating rate should be increased. Immediately after quenching (in order to avoid spontaneous cracking) products of martensitic steels must be subjected to the release. The maximum strength properties of the products acquired after the holidays according to the mode: heating up to 250-300 °C, exposure 1-3 h, air cooling. Maximum corrosion resistance and formability products acquired after the holidays according to the mode: heating up to 700-750 °With, exposure time - 20 min + 1 min per 1 mm maximum metal thickness, but not less than 40 min, cooling in oil. Softening heat treatment is annealing at 750-850 °C with cooling with the furnace to 500 °C. is Not allowed to make a vacation at 450-550 °C, Since this leads to a decrease in toughness. Workpiece to improve the mechanical workability is subjected to intermediate annealing at 600-760 °C for 2-4 h.