Steel 40G2

Designation

Name The value
Designation GOST Cyrillic 40Г2
Designation GOST Latin 40G2
Transliteration 40G2
By chemical elements 40Mn2

Description

Steel 40G2 is used: for the manufacture of axles, crankshafts, piston drains, levers, junction platens, propeller shafts, axle shafts and other parts; casting parts for the industry.

Note

Structural steel high-quality manganese.

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 10702-78, GOST 14955-77, GOST 1050-2013, TU 14-1-2118-77, TU 14-11-245-88, TU 14-1-5228-93, TU 14-136-367-2008
Steel castings В82 OST 1 90093-82
Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-4944-90

Mechanical properties

Section, mm t отпуска, °C sT|s0,2, MPa σU, MPa d5, % d d10 y, % KCU, kJ/m2 HB, MPa
Hot-rolled steel and hot rolled with special surface finish
- - - - - - - - - ≤217
Steel calibrated and calibrated with special surface finish
- - - - - - - - - ≤255
Quenching in water from 820 °C to + vacation at 600 °C, cooling in water
100 - 490 720 18 - - 56 290 -
Salka in water from 820 °C to + vacation at 600 °C, cooling in water (named place of clippings sample)
100 - 660 800 - 16 - 60 410 241
Rod with cross section of 25 mm. Quenching in oil from 830 °C to + vacation, cooling in oil
- 375 - 1390 - 8 - 44 98 402
Annealing at 900 °C, air cooling, then heating up to 650 °C, cooling with the furnace
- - 450 800 - - 18 40 - -
Quenching in water from 820 °C to + vacation at 600 °C, cooling in water
50 - 590 770 18 - - 57 680 -
Salka in water from 820 °C to + vacation at 600 °C, cooling in water (named place of clippings sample)
75 - - 820 - 16 - 60 680 242
Rod with cross section of 25 mm. Quenching in oil from 830 °C to + vacation, cooling in oil
- 450 950 1040 - 12 - 55 285 321
Annealing at 900 °C, air cooling, then heating up to 650 °C, cooling with the furnace
- - 410 740 - - 17 40 - -
Quenching in water from 820 °C to + vacation at 600 °C, cooling in water
75 - 540 730 18 - - 54 590 -
Salka in water from 820 °C to + vacation at 600 °C, cooling in water (named place of clippings sample)
100 - 490 720 - 18 - 56 290 210
Rod with cross section of 25 mm. Quenching in oil from 830 °C to + vacation, cooling in oil
- 525 880 980 - 14 - 55 343 286
Quenching in oil from 860 °C to + vacation at 650 °C, air cooling
≤25 - 380 660 12 - - 40 - -
Salka in water from 820 °C to + vacation at 600 °C, cooling in water (named place of clippings sample)
50 - 590 770 - 18 - 57 680 220
Rod with cross section of 25 mm. Quenching in oil from 830 °C to + vacation, cooling in oil
- 600 680 800 - 18 - 65 883 241
Normalization at 870-925 °C, air cooling + tempering in oil 800-830 °C + vacation at 425 °C
≤38 - 930 1100 10 - - 40 - 331
Salka in water from 820 °C to + vacation at 600 °C, cooling in water (named place of clippings sample)
75 - 540 730 - 18 - 54 590 210
Rod with cross section of 28 mm. Quenching in oil from 820 °C to + vacation
- 250 1490 1760 - - 4 19 98 500
- 300 1470 1620 - - 6 30 98 460
Annealing: heating to 775 °C at a rate of 250 deg/h, exposure time, cooling at a speed of 40 deg/h
- - 380 660 23 - - 57 470 179
Casting. Annealing or normalization at 870-890 °C Quenching in oil with 850-870 °C + Vacation
- 600-650 ≥390 ≥740 ≥12 - - ≥30 ≥392 212-255
Rod with cross section of 28 mm. Quenching in oil from 820 °C to + vacation
- 400 1270 1330 - - 10 50 579 400
Casting. Annealing or normalization at 870-890 °C Quenching in oil with 850-870 °C + Vacation
- 550-600 ≥590 ≥880 ≥8 - - ≥15 ≥196 255-302
Rod with cross section of 28 mm. Quenching in oil from 820 °C to + vacation
- 500 980 1080 - - 15 60 1245 340
- 600 780 850 - - 19 62 1726 250

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

Physical characteristics

Temperature Е, HPa r, kg/m3
0 212 7800

A description of the physical symbols

Name Description
Е The normal elasticity modulus
G Modulus of elasticity shear torsion
r Density
l Coefficient of thermal conductivity
R UD. the resistivity
С Specific heat

Technological properties

Name The value
Weldability difficult weldability. RDS required heating and subsequent heat treatment.
Склонность к отпускной хрупкости inclined
The temperature of forging Start - 1180-1200 °C, the end - of 800-850 °C. the Cooling sections 60 mm is more slow.
Flock-sensitive sensitivity sensitive
Machinability HB 201 Kn TV.SPL.=0.8 Kn b.St.=0.7