Alloy HN77TYUR (EI437BU)

Designation

Name	The value
Designation GOST Cyrillic	ХН77ТЮР
Designation GOST Latin	XH77TJuP
Transliteration	HN77TYuR
By chemical elements	CrNi77TeAlHg

Name	The value
Designation GOST Cyrillic	ЭИ437Б
Designation GOST Latin	EI437B
Transliteration	EhI437B
By chemical elements	-

Description

Alloy HN77TYUR used: for the manufacture of hot-rolled bars; cold strip; discs, rings, turbine blades and other parts operating at temperatures up to +750 °C; spring wire, intended for the production of cylindrical compression springs and extension springs with temperatures from -253 °C to +500 °C in various environments (air, vapor of sea water up to +200 °C, vacuum) and used in sealing of turbines, stop valves, heaters, control devices reactors.

Note

High-temperature Nickel-based alloy.
The recommended maximum operating temperature for limited time +750 °C.
The temperature of beginning of intensive scaling in air +1050 °C.

Standards

Name	Code	Standards
Steel pipes and fittings to them	В62	GOST 14162-79, TU 14-3-501-76, TU 14-3-946-80
Sheets and strips	В23	GOST 19904-90
Bars and shapes	В32	GOST 23705-79, TU 14-1-223-72, TU 14-1-2930-80, TU 14-1-3953-85, TU 14-1-402-72, TU 14-1-75-71, TU 14-11-245-88
Sheets and strips	В33	GOST 24982-81, TU 14-1-1747-76
Classification, nomenclature and General rules	В30	GOST 5632-72
Parts and assemblies common to the various machines and mechanisms	Г11	GOST Р 50753-95
Thermal and thermochemical treatment of metals	В04	OST 1 90154-74
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-1465-75, TU 14-1-1214-75, TU 14-1-895-74
Castings with special properties (iron and steel)	В83	TU 1-812-0050-81
Processing of metals by pressure. Forgings	В03	TU 14-1-1530-75
Tape	В34	TU 14-1-927-74
Welding and cutting metals. Soldering, riveting	В05	TU 14-1-997-2012
Tubes of non-ferrous metals and alloys	В64	TU 14-3-520-76
Steel wire medium and high carbon	В72	TU 3-825-80

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	As	Al	B	Ti	Mo	Sn	Sb	Pb	Ce
TU 14-1-1465-75	≤0.07	≤0.007	≤0.015	≤0.4	19-22	≤0.6	Rest	≤1	≤0.07	-	0.6-1	0.003-0.01	2.4-2.8	-	-	-	≤0.001	≤0.02
TU 14-1-223-72	0.04-0.08	≤0.007	≤0.015	≤0.4	19-22	≤0.6	Rest	≤1	≤0.07	-	0.6-1	≤0.01	2.4-2.8	-	-	-	≤0.001	≤0.02
TU 14-1-402-72	≤0.07	≤0.007	≤0.015	≤0.4	19-22	≤0.6	Rest	≤1	≤0.07	-	0.6-1	0.003-0.01	2.4-2.8	-	-	-	≤0.001	≤0.02
TU 14-1-1747-76	≤0.07	≤0.007	≤0.015	≤0.4	19-22	≤0.6	Rest	≤1	≤0.3	≤0.001	0.6-1	≤0.01	2.4-2.8	≤0.3	≤0.001	≤0.001	≤0.01	≤0.02
TU 14-1-927-74	≤0.07	≤0.007	≤0.015	≤0.4	19-22	≤0.6	Rest	≤1	≤0.07	-	0.6-1	≤0.01	2.4-2.8	-	-	-	≤0.001	≤0.02
TU 14-3-520-76	≤0.07	≤0.007	≤0.015	≤0.4	19-22	≤0.6	Rest	≤0.4	≤0.07	-	0.6-1	≤0.01	2.4-2.8	-	-	-	≤0.001	≤0.02
GOST 5632-72	≤0.07	≤0.007	≤0.015	≤0.4	19-22	≤0.6	Rest	≤1	≤0.3	-	0.6-1	≤0.01	2.4-2.8	≤0.3	-	-	≤0.01	≤0.02

Ni is the basis.
According to TU 14-1-927-74, TU 14-3-520-76 and TU 14-1-223-72 boron and deoxidizers (cerium, calcium, barium) are introduced into the metal by calculation and chemical analysis is not determined. Presence of antimony, tin, bismuth and arsenic in the alloy is possible within the 1 st scale of the spectral analysis scale.
According to TU 14-1-1465-75, the presence of antimony, tin, bismuth, arsenic is allowed no more than 1 point of the spectral analysis scale. Boron and cerium are introduced by calculation and chemical analysis are not determined. The residual copper content is not more than 0.070%.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d₁₀	y, %	KCU, kJ/m²	HB, MPa
Tubes of small dimensions (capillary) heat-treated or cold-worked in the state of delivery according to GOST 14162-79
	-	≥784	≥20	-	-	-	-
Bars hot rolled and forged and according to GOST 23705-79, THE 14-1-223-72. Hardening in air, 1070-1090 °C (exposure 8 h) + Aging at 690-710 °C (aging 16 h), air cooling
	610-690	930-1080	15-30	-	15-30	392-980	255-321
Rolled steel. Annealing in air from 1080 °C (exposure 8 h) + Ageing at 750 °C (aging 16 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥750	≥900	6-7	-	5-10	-	295-302
-	≥670	≥930	23-25	-	21-28	-	-
Cold-rolled steel strip of 0.2-1.2 mm on the other 14-1-927-74. Quenching in water or air with 1080-1120 °C
-	-	≤883	≥30	-	-	-	-
The sample is diameter 5 mm, length 25 mm, forged and normalized. The rate of deformation of 1.1 mm/min strain Rate 0,0007 1/
-	-	≥600	≥24	-	≥23	-	-
Steel cold-rolled sheet (0.8 to 3.9 mm) and HR (2.0 to 3.9 mm) in the delivery state according to GOST 24982-81. Annealing under a water shower or air 1080-1120 °C + Aging at 740-760 °C (extract 5 h), air cooling
≤3.9	-	≤930	≥20	-	-	-	-
Bars hot rolled and forged and according to GOST 23705-79, THE 14-1-223-72. Hardening in air, 1070-1090 °C (exposure 8 h) + Aging at 690-710 °C (aging 16 h), air cooling
	540-610	735-880	15-30	-	20-30	588-1177	-
Rolled steel. Annealing in air from 1080 °C (exposure 8 h) + Ageing at 750 °C (aging 16 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥770	≥900	3-4	-	5-7	-	295-313
-	≥670	≥870	11-12	-	12-16	-	-
The sample is diameter 5 mm, length 25 mm, forged and normalized. The rate of deformation of 1.1 mm/min strain Rate 0,0007 1/
-	-	≥380	≥26	-	≥28	-	-
Steel cold-rolled sheet (0.8 to 3.9 mm) and HR (2.0 to 3.9 mm) in the delivery state according to GOST 24982-81. Annealing under a water shower or air 1080-1120 °C + Aging at 740-760 °C (extract 5 h), air cooling
≤3.9	-	≥590	≥8	-	-	-	-
Bars hot rolled and forged and according to GOST 23705-79, THE 14-1-223-72. Hardening in air, 1070-1090 °C (exposure 8 h) + Aging at 690-710 °C (aging 16 h), air cooling
	-	640-735	10-20	-	15-30	≥367	-
Rolled steel. Annealing in air from 1080 °C (exposure 8 h) + Ageing at 750 °C (aging 16 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥750	≥1060	13-17	-	12-19	-	285
-	≥660	≥960	21-23	-	21-25	-	-
The sample is diameter 5 mm, length 25 mm, forged and normalized. The rate of deformation of 1.1 mm/min strain Rate 0,0007 1/
-	-	≥110	≥80	-	≥95	-	-
Rolled sheet. Annealing in air from 1080 °C 3 minutes + Ageing at 750 °C (maintained for 5 h), air cooling
≥4	-	≥1080	-	≥30	-	-	-
Rolled steel. Annealing in air from 1080 °C (exposure 8 h) + Ageing at 750 °C (aging 16 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥760	≥1140	17-21	-	19-21	-	302
-	≥650	≥930	12-18	-	14-19	-	-
The sample is diameter 5 mm, length 25 mm, forged and normalized. The rate of deformation of 1.1 mm/min strain Rate 0,0007 1/
-	-	≥48	≥153	-	≥100	-	-
Rolled steel. Annealing in air from 1080 °C (exposure 8 h) + Aging at 700 °C (aging 16 h), air cooling
25-100	620-640	950-980	≥15	-	≥15	-	255-321
Rolled steel. Annealing in air from 1080 °C (exposure 8 h) + Ageing at 750 °C (aging 16 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥730	≥1080	15-24	-	14-23	-	285-295
-	≥610	≥800	18	-	21	-	-
The sample is diameter 5 mm, length 25 mm, forged and normalized. The rate of deformation of 1.1 mm/min strain Rate 0,0007 1/
-	-	≥34	≥134	-	≥100	-	-
Rolled steel. Annealing in air from 1080 °C (exposure 8 h) + Aging at 700 °C (aging 16 h), air cooling
25	≥730	≥1080	-	≥32	-	-	-
Forgings on the other 14-1-1465-75. Hardening in air, 1070-1090 °C (exposure 8 h), air cooling + Ageing at 690-710 °C (aging 16 h), air cooling
	-	≥765	≥16	-	≥20	-	-
Rolled steel. Annealing in air from 1080 °C (exposure 8 h) + Ageing at 750 °C (aging 16 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥670	≥1180	20-23	-	19-25	-	285-302
-	520-590	700-810	15-23	-	14-30	-	-
Rolled steel. Annealing in air from 1080 °C (exposure for 8 hours)
	≥315	≥730	-	≥43	-	-	-
Rolled steel. Hardening in air, 1070-1090 °C + Aging at 700-720 °C (aging 16 h), air cooling
-	≥650	900-1070	11-24	-	10-21	-	-
Rolled steel. Annealing in air from 1080 °C (exposure 8 h) + Ageing at 750 °C (aging 16 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥490	≥1000	28-30	-	32-34	-	263-269
-	≥420	≥500	9-11	-	12-14	-	-
Rolled steel. Hardening in air, 1070-1090 °C + Aging at 700-720 °C (aging 16 h), air cooling
-	≥570	880	22-29	-	19-27	-	-
Rolled steel. Annealing in air from 1080 °C (exposure 8 h) + Ageing at 750 °C (aging 16 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥650	900-1070	11-24	-	10-21	-	269-285
Thin-walled seamless tubes according to TU 14-3-520-76 on delivery
	-	≥686	≥35	-	-	-	-
Rolled steel. Hardening in air, 1070-1090 °C + Aging at 700-720 °C (aging 16 h), air cooling
-	≥540	860	30-33	-	30-32	-	-
-	≥520	820	25-29	-	27-32	-	-
-	≥460	520	15-16	-	25-30	-	-

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
d₁₀	Elongation after rupture
y	The relative narrowing
KCU	Toughness
HB	Brinell hardness number

Physical characteristics

Temperature	Е, HPa	r, kg/m³	l, W/(m · °C)	R, Mr. · m	a, 10^-6 1/°C
20	196	8200	13	-	-
600	157	8000	24	1288	14
700	147	7960	25	1272	145
800	128	7920	28	1253	155
100	-	8180	14	1247	119
200	-	8140	16	1262	127
300	-	8110	17	1282	13
400	-	8070	19	1300	135
500	-	8040	21	1308	137
900	-	7870	31	1232	151
1000	-	-	-	-	168
1100	-	-	-	-	158

A description of the physical symbols

Name	Description
Е	The normal elasticity modulus
r	Density
l	Coefficient of thermal conductivity
R	UD. the resistivity

Technological properties

Name	The value
Weldability	Difficult weldability. The welding process - SMAW.
The temperature of forging	Start - 1180 °C, the end of - 900 °C. the cross Sections up to 300 mm are cooled in air.
Machinability	In heat treated condition when HB 262 and blower SB=1060 MPa Kn TV.SPL.=0,20 Kn b.St.=0,08.