Designation
| Name |
The value |
| Designation GOST Cyrillic |
20Г2 |
| Designation GOST Latin |
20G2 |
| Transliteration |
20G2 |
| By chemical elements |
20Mn2 |
Description
Steel 20G2 is used: for the production of tooling durability operating under moderate and significant pressures without heating the cutting edge; the wire intended for the manufacture of rivets and bolts by cold heading.
Standards
| Name |
Code |
Standards |
| Bars and shapes |
В32 |
GOST 10702-78 |
| Sheets and strips |
В33 |
TU 14-1-1035-74 |
| Steel wire medium and high carbon |
В72 |
TU 14-4-385-73 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
| GOST 10702-78 |
0.18-0.26 |
≤0.035 |
≤0.035 |
1.3-1.6 |
≤0.25 |
0.17-0.37 |
≤0.25 |
Rest |
≤0.2 |
| TU 14-4-385-73 |
0.18-0.26 |
≤0.035 |
≤0.035 |
1.3-1.6 |
≤0.25 |
0.17-0.37 |
≤0.25 |
Rest |
≤0.2 |
Fe is the basis.
Mechanical properties
| Section, mm |
σU, MPa |
d5, % |
HB, MPa |
| Hot-rolled steel and hot rolled with special surface finish |
| - |
- |
- |
≤187 |
| Steel calibrated and calibrated with special surface finish |
| - |
490-690 |
- |
- |
| - |
- |
- |
≤197 |
| - |
- |
- |
≤197 |
| Wire on the other 14-4-385-73 in the delivery condition. Subanguina with pre-annealing to granular pearlite |
|
490-687 |
≥10 |
- |
Description mechanical marks
| Name |
Description |
| σU |
Limit short-term strength |
| d5 |
Elongation after rupture |
| HB |
Brinell hardness number |
