Steel 30Х2НВФА

Designation

Name The value
Designation GOST Cyrillic 30Х2НВФА
Designation GOST Latin 30X2HBFA
Transliteration 30H2NVFA
By chemical elements 30Cr2НWV

Description

30Х2НВФА steel is used: for the manufacture of critical parts of high strength and toughness, working in conditions of alternating loads (crankshafts, gears, connecting rods, etc.); for the manufacture of parts with large cross sections requiring high hardenability; parts aircraft industry in the nitride state.

Note

Alloy structural steel vysokokachestvennoj.
Often steel parts 30Х2НВФА applied nitriding.

Standards

Name Code Standards
Classification, nomenclature and General rules В20 OST 1 90005-91
Blanks. Of the workpiece. Slabs В31 TU 1-92-156-90
Bars and shapes В32 TU 14-1-950-74

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo W
TU 14-1-950-74 0.27-0.34 ≤0.025 ≤0.025 0.3-0.6 1.6-2 0.17-0.37 1.4-1.8 Rest ≤0.25 0.18-0.28 ≤0.03 ≤0.15 1.2-1.6
Fe is the basis.

Mechanical properties

Section, mm t отпуска, °C sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2 HB, MPa HRC
Bars and strip hot rolled and forged. Quenching in oil with 890-910 °C + vacation, air cooling or oil
610-660 ≥835 ≥1030 ≥12 ≥55 ≥981 285-341 -
Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91
- - - - - - - 285-341 27-36
Bars and strip hot rolled and forged. Quenching in oil with 890-910 °C + vacation, air cooling or oil
560-625 ≥980 ≥1180 ≥10 ≥45 ≥687 341-388 -
Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91
- - - - - - - 331-376 36-40

Description mechanical marks

Name Description
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU Limit short-term strength
d5 Elongation after rupture
y The relative narrowing
KCU Toughness
HB Brinell hardness number
HRC Rockwell hardness (indenter diamond spheroconical)