Steel 70G
Designation
| Name |
The value |
| Designation GOST Cyrillic |
70Г |
| Designation GOST Latin |
70G |
| Transliteration |
70G |
| The chemical elements |
70Mn |
Description
Steel 70G used: for the manufacture of springs of different machines and mechanisms in various industries; knives earthmoving machinery (bulldozers, scrapers, graders and graders, as well as to the dozer and grader blades equipment excavators, rollers and other earth moving machines); measuring tapes; quenched and tempered carded a round wire and shaped steel used for the manufacture of brackets needle products.
Note
Steel spring alloy.
Standards
| Name |
Code |
Standards |
| Sectional and shaped rolling |
В32 |
GOST 14959-79, TU 14-1-2118-77, TU 14-11-245-88, TU 14-1-1271-75, TU 14-136-367-2008 |
| Sheets and stripes |
В33 |
GOST 1577-93, TU 14-1-2004-77, TU 14-1-2946-80, TU 14-1-4118-86, TU 14-1-4118-2004 |
| Tapes |
В34 |
GOST 2283-79 |
| Low-carbon steel wire |
В71 |
GOST 3875-83 |
| Sheets and stripes |
В23 |
GOST 82-70 |
| Sectional and shaped rolling |
В22 |
GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 9234-74, GOST 11474-76, GOST 17152-89 |
| Steel wire medium- and high-carbon |
В72 |
GOST 9389-75, GOST 26366-84 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
| GOST 14959-79 |
0.67-0.75 |
≤0.035 |
≤0.035 |
0.9-1.2 |
≤0.25 |
0.17-0.37 |
0.25 |
The rest |
≤0.2 |
| GOST 17152-89 (ИСО 7129-82 |
0.67-0.75 |
≤0.035 |
≤0.035 |
0.9-1.2 |
≤0.25 |
0.17-0.37 |
0.25 |
The rest |
≤0.2 |
Fe is the basis.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
d4 |
d10 |
y, % |
| Carden wire 0.2-0.8 mm as supplied by GOST 3875-83 (samples) |
| - |
- |
2160-2350 |
- |
- |
- |
- |
| - |
- |
2351-2550 |
- |
- |
- |
- |
| Cold-rolled steel strip of 0.1-4.0 mm according to GOST 2283-79 on delivery |
| 0.1-4 |
- |
740-1180 |
- |
- |
- |
- |
| 0.1-1.5 |
- |
≤640 |
- |
≥15 |
- |
- |
| 1.5-4 |
- |
≤740 |
- |
≥10 |
- |
- |
| 1.5-4 |
- |
≤640 |
- |
≥10 |
- |
- |
| Flats on the other 14-1-4118-2004 |
|
- |
640-880 |
- |
≥8 |
≥10 |
- |
| Rolled steel. Steel categories: 3, 3A, 3B, 3C, 3D, 4, 4A, 4B. Hardened in oil from 830 °C to + vacation at 470 °C |
|
≥835 |
≥1030 |
≥7 |
- |
- |
≥25 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| d4 |
Elongation after rupture |
| d10 |
Elongation after rupture |
| y |
The relative narrowing |
