Steel 42Х2НВМБР (KVK-42)

Designation

Name The value
Designation GOST Cyrillic 42Х2НВМБР
Designation GOST Latin 42X2HBMBP
Transliteration 42H2NVMBR
By chemical elements 42Cr2НWMoNbB
Name The value
Designation GOST Cyrillic КВК-42
Designation GOST Latin KBK-42
Transliteration KVK-42
By chemical elements CoWCo-42

Description

42Х2НВМБР steel is used: for the manufacture of hot-rolled bars, rolled plates, forgings and die forgings intended for the manufacture of various parts of power plant engineering.

Standards

Name Code Standards
Bars and shapes В22 GOST 2590-2006, GOST 2591-2006
Blanks. Of the workpiece. Slabs В21 OST 14-13-75
Sheets and strips В33 TU 14-1-1236-74
Bars and shapes В32 TU 14-1-1310-75

Chemical composition

Standard C S P Mn Cr Si Ni Fe B Mo Nb W
TU 14-1-1310-75 0.39-0.43 ≤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 42Х2НВМБР (КВК-42). The total content of sulfur and phosphorus 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.

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
≥1862 ≥7 ≥343

Description mechanical marks

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