07Х3ГНМЮА steel is used: for the manufacture of hot-rolled bars and forgings, pipe billets and flat steel products, used for the production of parts of machinery and special purpose; cold-deformed and hot-deformed tubes for the production of solid cylinders downhole sucker rod pumps.

Note

Steel low carbon martensitic class.

Standards

Name	Code	Standards
Sheets and strips	В23	TU 14-1-3370-2006
Sheets and strips	В33	TU 14-1-3370-82
Bars and shapes	В32	TU 14-1-4229-87
Blanks. Of the workpiece. Slabs	В31	TU 14-1-4230-87, TU 14-1-4408-88
Steel pipes and fittings to them	В62	TU 14-159-227-93, TU 14-3-1756-91
Processing of metals by pressure. Forgings	В03	TU 3-1078-78

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	Al	Mo
TU 14-1-4408-88	0.04-0.11	≤0.025	≤0.025	0.8-1.2	2.9-3.4	0.17-0.37	0.8-1.2	Rest	≤0.3	0.01-0.03	0.2-0.3
TU 14-1-4229-87	0.06-0.1	≤0.025	≤0.025	0.8-1.2	2.9-3.4	0.17-0.37	0.9-1.3	Rest	≤0.3	0.01-0.03	0.2-0.3
TU 14-1-3370-82	0.06-0.1	≤0.025	≤0.025	0.8-1.2	2.9-3.4	0.17-0.37	0.9-1.3	Rest	≤0.25	0.01-0.03	0.2-0.3

Fe is the basis.
According to TU 14-1-4229-87 and TU 14-1-4408-88 the chemical composition is given for steel grade 07H3GNMYUA. The presence of tungsten to 0.20%, titanium to 0.30% and vanadium to 0.050% are not a defect.
According to TU 14-1-4229-87 ready rolled products deviations from the chemical composition standards are allowed in accordance with GOST 4543, aluminum +0.020%, -0.0050%; for carbon ± 0.010%.
According to TU 14-1-4408-88, in the finished pipe billet, deviations in chemical composition are allowed: by carbon +0.010%, for silicon + 0.030 / -0.020%, for manganese ± 0.050%, for aluminum +0.020%, for chromium ± 0.050 %, nickel -0.050%, molybdenum ± 0.020%. The steel is smelted in an electric arc furnace or in a main open-hearth furnace, followed by treatment in a ladle with synthetic slags and liquid ligature.
According to TU 14-1-3370-2006 the chemical composition is given for steel grade 07H3GNMYUA. The presence in the steel of the mass fraction of tungsten to 0.20%, titanium to 0.030% and vanadium to 0.050% is not a rejection sign. In the finished rolled products, deviations from the chemical composition standards are allowed in accordance with GOST 4543, aluminum + 0.020 / -0.0050%, carbon ± 0.010%.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²
Flats on the other 14-1-3370-2006. Hardening in air, 900-940 °C + Vacation at 250-450 °C (exposure 2 hours), air cooling. The graph shows the indices of KCU KCU+20°C/KCU-50°C
	≥785	≥980	≥8	-	≥588/382
Flats on the other 14-1-3370-2006. With annealing 650-680 °C, air cooling + Tempering air with 900-940 °C + Vacation at 250-450 °C (exposure 2 hours), air cooling. The graph shows the indices of KCU KCU+20°C/KCU-50°C
	≥785	≥980	≥8	-	≥588/382
Bars hot rolled on the other 14-1-4229-87 and the tubular billet, rolled and forged on the other 14-1-4408-88. Annealing in air from 930 °C±10 ° C + Vacation at 200-400 °C (exposure 2 hours), air cooling (samples transverse)
20-30	≥784	≥981	≥10	≥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
Weldability	Without restrictions.
Flock-sensitive sensitivity	A tube blank on the other 14-1-4408-88 are delivered after anti-flake (obezvrezivate), ATI
Pressure treatment	Clan (extract ratio) tube blank on the other 14-1-4408-88 excluding precipitation should be at least 1.6.
Macrostructure and pollution	Macrostructure of steel hot-rolled bars on the other 14-1-4229-87 and a tube blank on the other 14-1-4408-88 on the etched transverse templeto or fracture should not have podnasadochnogo looseness, bubbles, cracks, placenow, delaminations, voids and foreign inclusions that are visible without using the magnifying devices. Defects in the macrostructure should not exceed norms: - point heterogeneity - 2 points; - the Central porosity - 2 points; - exudation square - 2 points; - Pousada liquation - 1 points. Common spotted and boundary liquation, subcortical bubbles and intergranular cracks are not allowed. The contamination of steel billets, non-metallic inclusions on the average score must not exceed: - oxides of stroke (OS) - 3.0 points; - point oxides (ON) - 2.0 points; - silicates fragile (CX) - 3.0 points; - silicates plastic (SP) - 3.0 points; - silicates, non-deformed (CH) - 2.0 points; - sulphides (C) - 3.0 points.

Steel 07Х3ГНМЮА

Designation

Description