37Х2НВМБР steel is used: for the manufacture of hot-rolled bars, rolled plates, forgings and die forgings intended for the manufacture of various parts of machinery; seamless hot-deformed pipes.

Standards

Name	Code	Standards
Bars and shapes	В22	GOST 2590-2006, GOST 2591-2006
Blanks. Of the workpiece. Slabs	В21	OST 14-13-75
Norms for calculation and design	В02	PI 1.2.053-78
Sheets and strips	В33	TU 14-1-1236-74, TU 14-1-2538-78
Bars and shapes	В32	TU 14-1-1310-75
Blanks. Of the workpiece. Slabs	В31	TU 14-1-2012-77
Steel pipes and fittings to them	В62	TU 14-3-1559-88

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	B	Mo	Nb	W
TU 14-1-2012-77	0.35-0.39	≤0.012	≤0.012	0.6-0.9	1.8-2.2	0.4-0.6	0.6-0.9	Rest	0.001-0.003	0.15-0.25	0.01-0.03	0.5-0.9

Fe is the basis.
According to TU 14-1-1310-75 the chemical composition is given for steel 37Х2НВМБР (КВК37). The total content of sulfur and bosfor should not exceed 0.022%. Boron is introduced by calculation and chemical analysis is not determined. Deviations in chemical composition - in accordance with GOST 4543.
According to TU 14-1-2012-77 the chemical composition is given for steel 37Х2НВМБР-ВД (КВК37-ВД). Boron is introduced by calculation and chemical analysis is not determined. Deviations in chemical composition - in accordance with GOST 4543, except sulfur, phosphorus and manganese. Deviations in sulfur and phosphorus are allowed, provided that their total content does not exceed 0.020%. Deviations in the content of manganese should be within the range of +0.10 / -0.15%. The residual copper content should not exceed 0.25%. A technological addition of vanadium in an amount up to 0.15% is allowed.

Mechanical properties

Section, mm	σ_U, MPa	d₅, %	KCU, kJ/m²
Bars hot rolled on the other 14-1-1310-75. Quenching in oil or air from 920-960 °C + Vacation at 200-240 °C, cooling in oil or air
	≥1666	≥8	≥392
Slabs on the other 14-1-2012-77. Quenching in oil or air with 940±10 °C + Vacation at 160-200 °C (2-4 h exposure). Allowed prior normalization of the samples
	≥1670	≥8	≥294

Description mechanical marks

Name	Description
σ_U	Limit short-term strength
d₅	Elongation after rupture
KCU	Toughness

Technological properties

Name	The value
Macrostructure and pollution	On the other 14-1-2012-77 in the macrostructure of steel slabs are allowed: - point nonuniformity ≤ 2 points; - the Central porosity ≤ 1 score; - square of exudation ≤ 1 points; layer-by-layer crystallization of ≤ 3 points. Pollution steel non-metallic inclusions should be: - sulphides ≤ 1.5 points; - oxides of stroke ≤ 1.5 points; - the fragile silicates ≤ 1.5 points; - the silicates plastic ≤ 1.5 points; - the nitrides of all kinds ≤ 2.0 points. Allowed attacks to 2 points no more than 2 samples of the sulphides, oxides, stroke, silicates fragile and plastic. Allowed attacks to 3 points with no more than two samples of the nitrides of all kinds, provided that in this case the sum of points of all types of inclusions does not exceed 5.
Particularities of production of goods	Slabs on the other 14-1-2012-77 are supplied in heat-treated (annealing or high tempering) without measuring hardness.

Steel 37Х2НВМБР (ERC-37)

Designation

Description

Standards

Chemical composition

Mechanical properties

Description mechanical marks

Technological properties

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