Steel 40Х2Н2МА

Designation

Name The value
Designation GOST Cyrillic 40Х2Н2МА
Designation GOST Latin 40X2H2MA
Transliteration 40H2N2MA
By chemical elements 40Cr2Н2Mo

Description

40Х2Н2МА steel is used: for the manufacture of large products, shafts, wheels, gear pinions, as well as special fasteners.

Note

Structural steel high-quality romancelatina.

Standards

Name Code Standards
Sheets and strips В23 GOST 103-2006
Bars and shapes В22 GOST 1133-71, GOST 8319.0-75, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Bars and shapes В32 GOST 4543-71, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-1-2118-77, TU 14-11-245-88, TU 14-136-367-2008
Processing of metals by pressure. Forgings В03 GOST 8479-70, ST ЦКБА 010-2004
Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-4944-90

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo
GOST 4543-71 0.35-0.42 ≤0.025 ≤0.025 0.3-0.6 1.25-1.65 0.17-0.37 1.35-1.75 Rest ≤0.3 ≤0.05 ≤0.03 0.2-0.3
Fe is the basis.
GOST 4543-71 regulates the content of high-quality steel: P≤0,025%; S≤0.015%; Сu≤0.25%. When the alloying Mo is replaced with W, the designation of the steel grade will be 40Х2Н2ВА.

Mechanical properties

Section, mm t отпуска, °C sT|s0,2, MPa σU, MPa d5, % d10 y, % KCU, kJ/m2 HB, MPa
Quenching in oil from 870 °C to + vacation at 600 °C, cooling in water or oil
≤25 - 930 1080 10 - 45 765 -
Hire. Quenching in oil from 950 °C to + vacation at 580-600 °C (named place of clippings sample)
300-500 - 770 960 - 17 - 520 -
Quenching + tempering (forgings)
300-500 - 590 735 12 - 35 432 235-277
The oil quenching from 870 °C to + vacation
- 400 1230 1400 12 - 49 - 430
Hire. Quenching in oil from 950 °C to + vacation at 580-600 °C (named place of clippings sample)
500-700 - 740 930 - 17 - - -
Quenching + tempering (forgings)
300-500 - 640 785 11 - 33 432 248-293
The oil quenching from 870 °C to + vacation
- 500 1090 1200 16 - 60 - 350
Hire. Quenching in oil from 950 °C to + vacation at 580-600 °C (named place of clippings sample)
700-900 - 700 890 - 16 - 451 -
Quenching + tempering (forgings)
≤100 - 735 880 13 - 40 579 277-321
The oil quenching from 870 °C to + vacation
- 600 850 950 20 - 62 - 280
Hire. Quenching in oil from 950 °C to + vacation at 580-600 °C (named place of clippings sample)
300-500 - 760 930 - 11 - 216 -
500-700 - 730 880 - 11 - 265 -
700-900 - 700 870 - 11 - 235 -
300-500 - 760 930 - 15 - 559 -
500-700 - 740 900 - 17 - 442 -
700-900 - 710 850 - 7 - 255 -
500-700 - 790 900 - - - 147 -
300-500 - 740 930 - 11 - 226 -
700-900 - 690 730 - - - 196 -

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
d10 Elongation after rupture
y The relative narrowing
KCU Toughness
HB Brinell hardness number

Technological properties

Name The value
Weldability difficult weldability. Method of welding: SMAW. Necessary preheating and subsequent heat treatment.
Склонность к отпускной хрупкости tend not
The temperature of forging Start - 1200 °C, the end - of 800 °C. the cross Sections up to 100 mm are cooled in air, 101-350 mm - in the pit.
Flock-sensitive sensitivity sensitive