20HG2TS
Weldability without restrictions.
for the manufacture of fittings periodic profile of A-IV (A600) with a diameter of 10 to 32 mm.
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Structural steel |
Low alloy structural steel for welded structures |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Cr, % |
Cu, % |
Ni, % |
Zr, % |
P, % |
C, % |
S, % |
|---|
| GOST 5781-82 |
95.11–96.96 |
0.4–0.7 |
1.5–1.9 |
0.9–1.2 |
< 0.3 |
< 0.3 |
0.05–0.14 |
< 0.045 |
0.19–0.26 |
< 0.045 |
Information on suppliers
Physical characteristics
| Temperature, °C |
$$\alpha\cdot 10^{6}$$, $$K^{-1}$$ |
|---|
| 100 |
12.3 |
| 200 |
12.3 |
| 300 |
12.5 |
| 400 |
13.1 |
| 500 |
13.5 |
| 600 |
13.9 |
| 700 |
14.2 |
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{P}$$, $$MPa$$ |
$$\epsilon_L$$, % |
Treatment |
|---|
| Fittings |
GOST 5781-82 |
10–18 |
|
|
883 |
590 |
6 |
|
Technological Properties
Critical point temperatures
| Ac1, K |
Ac3(Acm), K |
Ar3(Arcm), K |
Mn, K |
|---|
| 770 |
835 |
740 |
345 |
Analogues
| USA |
|---|
| A 615 Grade 100 [690] |
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| Mn |
% |
Manganese |
| Cr |
% |
Chrome |
| Cu |
% |
Copper |
| Ni |
% |
Nickel |
| Zr |
% |
Zirconium |
| P |
% |
Phosphorus |
| C |
% |
Carbon |
| S |
% |
Sulfur |
Description of physical characteristics
| Parameter |
Units of measurement |
Description |
| $$\alpha\cdot 10^{6}$$ |
$$K^{-1}$$ |
Coefficient of thermal (linear) expansion (range 20°C–T) |
Description of mechanical properties
| Parameter |
Units of measurement |
Description |
| $$\sigma _{U}$$ |
$$MPa$$ |
Ultimate tensile strength |
| $$\sigma_{P}$$ |
$$MPa$$ |
Proportionality limit |
| $$\epsilon_L$$ |
% |
Elongation at break (longitudinal) |
Designation of types of weldability
| Parameter |
Units of measurement |
Description |
| no limits |
|
Welding is performed without heating and without subsequent heat treatment |
| Boundedly welded |
|
Welding is possible with heating up to 100–120 °C and subsequent heat treatment |
| Difficult to weld |
|
For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing |
| Not applicable for welded structures |
|
|
Description of temperatures of critical points
| Parameter |
Units of measurement |
Description |
| Ac1 |
K |
|
| Ac3(Acm) |
K |
|
| Ar3(Arcm) |
K |
|
| Mn |
K |
|