Steel 35ХН3МФА (35ХН3МФАР)

Designation

Name	The value
Designation GOST Cyrillic	35ХН3МФА
Designation GOST Latin	35XH3MFA
Transliteration	35HN3MFA
By chemical elements	35CrН3MoV

Name	The value
Designation GOST Cyrillic	35ХН3МФАР
Designation GOST Latin	35XH3MFAP
Transliteration	35HN3MFAR
By chemical elements	35CrН3MoVNB

Description

35ХН3МФА steel is used: for the production of forged billets for rotors of troubleproof; rings for turbine generators, rotor shafts and flywheels forged shafts, turbine generator rotors, shafts and rotors of gas turbines and compressors and most critical highly loaded parts operating at temperatures up to 400 °C; heavily loaded parts of pipeline valves; cylinders with a volume of 400 liters, are designed for storing compressed air under pressure of 400 kgf/cm² at a temperature of from minus 50°to plus 60 °C.

Note

Structural steel high-quality hromonikelemolibdenovyh.

Standards

Name	Code	Standards
Sheets and strips	В23	GOST 103-2006
Bars and shapes	В32	GOST 1051-73, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77
Bars and shapes	В22	GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Processing of metals by pressure. Forgings	В03	GOST 8479-70, TU 3-896-78, TU 108-11-910-87, TU 108.11.923-87
Blanks. Of the workpiece. Slabs	В31	TU 108.11.889-87
Steel cylinders	В66	TU 14-3-883-79

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Mo
TU 3-896-78	0.3-0.4	≤0.025	≤0.025	0.25-0.5	1.1-1.4	0.17-0.37	2.75-3.25	Rest	≤0.2	0.08-0.15	0.3-0.4
TU 14-3-883-79	0.34-0.39	≤0.022	≤0.022	0.25-0.5	1.1-1.4	0.22-0.37	2.75-3.25	Rest	≤0.3	0.08-0.15	0.3-0.4
TU 108.11.923-87	0.25-0.35	≤0.015	≤0.015	0.2-0.6	1.1-1.55	≤0.37	2.6-3.55	Rest	≤0.2	0.05-0.15	0.3-0.7
TU 108.11.889-87	0.3-0.35	≤0.02	≤0.02	0.2-0.4	1.1-1.4	≤0.37	2.75-3.25	Rest	≤0.3	0.08-0.15	0.3-0.4

Fe is the basis.
According to TU 14-3-883-79 the chemical composition is given for the steel of rotary grade 35ХН3МФА. Permissible deviations in chemical composition: carbon ± 0.010%, chromium ± 0.050%, manganese ± 0.020%, molybdenum ± 0.020%, vanadium ± 0.020%, nickel -0.10%, silicon +0.020%, On sulfur and phosphorus +0.0050% of each.
According to TU 3-896-78 the chemical composition is given for the rotary grade steel 35ХН3МФАР.
According to TU 108.11.923-87, the chemical composition is given for the steel of the rotary grade 35ХН3МФА. The total content of S + P≤0,025 for smelting by a duplex process and in electric furnaces. The content of S≤0.010%, P≤0.010% after out-of-furnace refining with a total content of S + P≤0,020%. The content of S≤0.012%, P≤0.012% after out-of-furnace evacuation (ODS) with a total content of S + P≤0,020%.
According to TU 108.11.889-87, deviations in chemical composition are allowed: by carbon ± 0.010%, by chroma ± 0.050%, by manganese ± 0.020%, by molybdenum ± 0.020%, by vanadium ± 0.020%, by nickel -0.10% , for silicon +0.020%. The total content of sulfur and phosphorus should not be more than 0.036% for smelting by a duplex process and in an electric furnace. The sulfur and phosphorus content after the use of the out-of-furnace refining and evacuation unit (OVPV) should not be more than 0.010% and 0.012%, respectively, for a sum of sulfur and phosphorus not more than 0.020%. The steel shall be melted according to the manufacturer's technical documentation using the UVRB unit. It is allowed to melt steel in an open-hearth furnace by a duplex process or in the main electric arc furnace.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²
Steel cylinders on the other 14-3-883-79
	≥980	≥1128	≥11	≥45	≥686
Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential)
-	294	491	16	30	294
Steel cylinders on the other 14-3-883-79
	≥980	≥1098	≥11	≥45	≥686
Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential)
-	392	589	16	30	491
For billet flywheels (indicates the direction and place the clippings of the sample) THAT 108.11.923-87
-	637	735	16	45	588
Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential)
-	491	687	16	30	392
For billet flywheels (indicates the direction and place the clippings of the sample) THAT 108.11.923-87
-	637	735	17	50	686
Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential)
-	589	765	16	35	491
For billet flywheels (indicates the direction and place the clippings of the sample) THAT 108.11.923-87
-	637	735	16	45	588
Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential)
-	687	834	14	35	491
Billet rotor of the turbogenerator of 1000 MW (indicates the direction and place the clippings of the sample) THAT 108.11.923-87
-	666-813	764	16	45	490
Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential)
-	785	932	13	35	392
Billet rotor of the turbogenerator of 1000 MW (indicates the direction and place the clippings of the sample) THAT 108.11.923-87
-	666-813	764	17	50	686
Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential)
-	883	1010	12	30	392
Billet rotor of the turbogenerator of 1000 MW (indicates the direction and place the clippings of the sample) THAT 108.11.923-87
-	666-813	764	16	45	588
Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential)
-	981	1079	11	30	294
Billet rotor of the turbogenerator with the capacity of 1200 MW (indicates the direction and place the clippings of the sample) THAT 108.11.923-87
-	666-813	764	16	45	490
Forged billet rotors of turbine generators, thermal power plants up to 500 MW III-VI categories on the other 3-896-78 (indicate the cutting direction of sample)
-	540	687	19	55	1177
Billet rotor of the turbogenerator with the capacity of 1200 MW (indicates the direction and place the clippings of the sample) THAT 108.11.923-87
-	666-813	764	17	50	686
Forged billet rotors of turbine generators, thermal power plants up to 500 MW III-VI categories on the other 3-896-78 (indicate the cutting direction of sample)
-	540	687	17	45	785
Billet rotor of the turbogenerator with the capacity of 1200 MW (indicates the direction and place the clippings of the sample) THAT 108.11.923-87
-	666-813	764	16	45	588
Forged billet rotors of turbine generators, thermal power plants up to 500 MW III-VI categories on the other 3-896-78 (indicate the cutting direction of sample)
-	638	785	18	55	981
Billet rotor of the turbogenerator by power 800 MW (indicates the direction and place the clippings of the sample) THAT 108.11.923-87
-	637	735	16	45	588
Forged billet rotors of turbine generators, thermal power plants up to 500 MW III-VI categories on the other 3-896-78 (indicate the cutting direction of sample)
-	638	785	17	45	687
Billet rotor of the turbogenerator by power 800 MW (indicates the direction and place the clippings of the sample) THAT 108.11.923-87
-	637	735	17	50	686
-	637	735	16	45	588

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
y	The relative narrowing
KCU	Toughness

Technological properties

Name	The value
Macrostructure and pollution	In the macrostructure of steel shall not be cavities, bubbles, delaminations, cracks, inclusions and placenow visible without magnification.