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Steel 45ХНМ (45ХНМА)

Steel 45KhNM (45KhNMA) 4X2NMF steel Steel 55X Steel 60Kh2SMF Steel 60CrNiG 60KhN steel 75XM steel Steel 75KhSMF 7X2SMF steel Steel 90KhMF Steel 9Х2МФ (9Х2МФА)

Designation

Name The value
Designation GOST Cyrillic 45ХНМ
Designation GOST Latin 45XHM
Transliteration 45HNM
The chemical elements 45CrНMo
Name The value
Designation GOST Cyrillic 45ХНМА
Designation GOST Latin 45XHMA
Transliteration 45HNMA
The chemical elements 45CrНMo

Description

45ХНМ steel is used: for the manufacture of a compound of the axes of the backup rolls of sheet mills for hot rolling of metals; gear shafts; hot rolled rings for car building; details of pipe fittings that are installed at hazardous production facilities.

Note

Steel hromonikelemolibdenovyh.

Standards

Name Code Standards
Metal forming. Forgings В03 GOST 8479-70, ST ЦКБА 010-2004
Sectional and shaped rolling В32 TU 14-1-1220-75, TU 14-1-2982-80

Chemical composition

Standard C S P Mn Cr Si Ni Mo
0.4-0.5 ≤0.04 ≤0.04 0.5-0.8 1.3-1.7 0.17-0.37 1.2-1.6 0.1-0.3
Chemical composition is not verified by NTD. Total verified brands for chemical compounds: 2906 of 3316.

Mechanical characteristics

Section, mm sT|s0,2, MPa σB, MPa d5, % y, % kJ/m2, кДж/м2 Brinell hardness number, MPa
Forgings. Hardening + Vacation
300-500 ≥440 ≥635 ≥13 ≥35 ≥490 197-235
300-500 ≥490 ≥655 ≥12 ≥35 ≥490 212-248
500-800 ≥540 ≥685 ≥10 ≥30 ≥390 223-262
100-300 ≥590 ≥735 ≥13 ≥40 ≥490 235-277
300-500 ≥590 ≥735 ≥12 ≥35 ≥440 235-277
500-800 ≥590 ≥735 ≥10 ≥30 ≥390 235-277
300-500 ≥685 ≥835 ≥11 ≥33 ≥390 262-311
Forgings. Normalization
100-300 ≥440 ≥635 ≥14 ≥40 ≥540 197-248
100-300 ≥440 ≥635 ≥14 ≥40 ≥540 197-235
500-800 ≥440 ≥635 ≥11 ≥30 ≥390 197-235
100-300 ≥490 ≥655 ≥13 ≥40 ≥540 212-248
Normalization at 860 °C, air cooling + Vacation at 600 °C, cooling with the furnace (named place of cutting out of samples)
200 ≥950 ≥1050 ≥12 ≥35 - 302
200 900-970 1010-1100 6-14 12-47 - 302-321
200 ≥920 ≥1040 ≥6 ≥10 - 302-341
Forgings. Quenching in oil with 840-870 °C + Vacation at 580-650 °C, cooling with the furnace (named place of cutting out of samples)
800-1200 ≥490 ≥640 ≥12 ≥28 ≥290 187-241

Description mechanical marks

Name Description
Section Section
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σB Limit short-term strength
d5 Elongation after rupture
y The relative narrowing
kJ/m2 Toughness

Technological properties

Name The value
Weldability Does not apply to welded structures.
Propensity to temper brittleness Malosolone.
Forging temperature Start - 1200 °C, the end - of 800 °C.
Flock-sensitive sensitivity A highly sensitive.
Workability by cutting In the hardened and tempered condition when NV 97-269 and blower SB=690 MPa Kn TV.SPL.=0,9 Kn b.St.=0,7.

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