Steel 30Х2НМФА (30Х2НМФ)

Designation

Name The value
Designation GOST Cyrillic 30Х2НМФА
Designation GOST Latin 30X2HMFA
Transliteration 30H2NMFA
By chemical elements 30Cr2НMoV
Name The value
Designation GOST Cyrillic 30Х2НМФ
Designation GOST Latin 30X2HMF
Transliteration 30H2NMF
By chemical elements 30Cr2НMoV

Description

30Х2НМФА steel is used: for the manufacture of forgings (forgings of IV and V groups) gears and wheel gears, shafts, bushings and clips gear couplings compressor machines; forged blanks shafts of compressors and gas turbines; performance parts high strength and toughness, working in conditions of alternating loads (crankshafts, gears, connecting rods, etc.); parts of large cross section requiring high hardenability.

Note

Alloy structural steel vysokokachestvennoj.
Often steel parts 30Х2НМФА applied nitriding.

Standards

Name Code Standards
Bars and shapes В32 TU 14-1-950-74
Processing of metals by pressure. Forgings В03 TU НЗЛ 318-88, TU НЗЛ 342-89
Blanks. Of the workpiece. Slabs В31 TU НЗЛ 341-93

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 0.4-0.5 ≤0.2
TU НЗЛ 342-89 0.27-0.34 ≤0.025 ≤0.025 0.3-0.6 1.6-2 0.17-0.37 1.4-1.8 Rest ≤0.3 0.18-0.28 - 0.4-0.55 -
Fe is the basis.
According to TU 14-1-950-86, TU NZL 318-88, TU NZL 342-89 the chemical composition is given for steel grade 30Х2НМФА.

Mechanical properties

Section, mm t отпуска, °C sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2 HB, MPa
Forged billet shafts of compressors and gas turbines, heat-treated in the delivery condition on the other NZL 342-89 (longitudinal samples, in the column of the delivery condition specified strength)
≤450 - 687-883 ≥803 ≥14 ≥35 ≥490 -
≤400 - 736-931 ≥852 ≥13 ≥35 ≥490 -
Forging parts gear compressor machines heat-treated in the delivery condition on the other NZL 318-88 (longitudinal samples)
800-1000 - 640-930 ≥735 ≥12 ≥40 ≥440 255-311
600-800 - 675-930 ≥785 ≥12 ≥40 ≥440 262-311
400-600 - 735-981 ≥835 ≥12 ≥40 ≥490 269-321
400 - 785-981 ≥880 ≥12 ≥45 ≥590 285-321
Bars and strip hot rolled and forged on the other 14-1-950-86. Quenching in oil with 890-910 °C + vacation, air cooling or oil
25 610-660 ≥834 ≥1030 ≥12 ≥55 ≥981 302-341
25 560-625 ≥981 ≥1177 ≥10 ≥45 ≥687 341-388

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