20KHGSA Alloy structural steel

Steelun Designation of 20KHGSA Alloy structural steel:

Name The value
Designation GOST Cyrillic 20ХГСА
Designation GOST Latin 20XGCA
Transliteration 20HGSA
By chemical elements 20CrMnС

Description Steelun of 20KHGSA Alloy structural steel:

20KHGSA steel is used: for the manufacture of hot rolled plates; chassis screws, axles, shafts, worms and other parts operating in conditions of wear and alternating loads at temperatures up to +200 °C; solid-rolled rings for different purposes.

Note

Structural steel high-quality chromonemata.

Steelun Standards of 20KHGSA Alloy structural steel:

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, OST 1 92049-76, TU 14-1-2118-77, TU 14-11-245-88, TU 14-1-1271-75, TU 14-1-5228-93, TU 14-136-367-2008
Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-4944-90
Sheets and strips В33 TU 14-1-1409-75, TU 14-1-4118-86, TU 14-1-4118-2004

Chemical composition Steelun of 20KHGSA Alloy structural steel:

Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo W
TU 14-1-4118-2004 0.17-0.23 ≤0.025 ≤0.025 0.8-1.1 0.8-1.1 0.9-1.2 ≤0.3 Rest ≤0.3 ≤0.05 ≤0.03 ≤0.15 ≤0.2
Fe is the basis.
GOST 4543-71 regulates the content of high-quality steel: P≤0,025%; S≤0.015%; Сu≤0.25%.

Steelun Mechanical properties of 20KHGSA Alloy structural steel:

Section, mm t отпуска, °C sT|s0,2, MPa σU, MPa d5, % d4 d10 y, % KCU, kJ/m2 HB, MPa
Hot-rolled steel and hot rolled with special surface finish
≤197
Steel calibrated and calibrated with special surface finish
≤207
Quenching in oil at 880 °C + vacation at 500 °C, cooling in water or oil
≤15 ≥640 ≥780 ≥12 ≥45 ≥677
Samples. Quenching in oil from 900 °C to +leave (exposure 30 min), air cooling
200 ≥1520 ≥9 ≥49 ≥577 ≤420
Flats on the other 14-1-4118-2004
490-690 ≥15 ≥18
Samples. Quenching in oil from 900 °C to +leave (exposure 30 min), air cooling
300 ≥1470 ≥9 ≥52 ≥577 ≤400
400 ≥1340 ≥8 ≥50 ≥481 ≤360
500 ≥1080 ≥10 ≥50 ≥765 ≤325
600 ≥880 ≥17 ≥52 ≥961 ≤255

Description mechanical marks steelun of 20KHGSA Alloy structural steel:

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
d4 Elongation after rupture
d10 Elongation after rupture
y The relative narrowing
KCU Toughness
HB Brinell hardness number

Steelun Physical characteristics of 20KHGSA Alloy structural steel:

Temperature r, kg/m3
0 7760

A description of the physical symbols steelun of 20KHGSA Alloy structural steel:

Name Description
Е The normal elasticity modulus
G Modulus of elasticity shear torsion
r Density
l Coefficient of thermal conductivity
R UD. the resistivity
a The coefficient of linear expansion

Steelun Technological properties of 20KHGSA Alloy structural steel:

Name The value
Weldability without limitation of RDS, CBS, ARDS, ADB submerged arc and gas protection electroslag welding – requires a subsequent heat treatment.
The tendency to temper brittleness inclined
The temperature of forging Start – 1200 °C, the end – of 800 °C.
Flock-sensitive sensitivity not sensitive
Machinability when NV 140-207 Kn TV.SPL.=0.7 Kn b.St.=0.60

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