Steel 37Х2НВМБР (ERC-37)

Designation

Name The value
Designation GOST Cyrillic 37Х2НВМБР
Designation GOST Latin 37X2HBMBP
Transliteration 37H2NVMBR
By chemical elements 37Cr2НWMoNbB
Name The value
Designation GOST Cyrillic КВК-37
Designation GOST Latin KBK-37
Transliteration KVK-37
By chemical elements CoWCo-37

Description

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 σU, 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
σU 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.