Steel 3K-7
70G steel
Steel 60S2HFA
Steel 60KhFA (60KhF)
Steel 65
Steel 65G (65G1)
Steel 65GA
Steel 65S2VA
Steel 68A
Steel 68GA
Steel 70
Steel 60S2HG
Steel 70G2
Steel 70S2HA (EI142)
Steel 70C3A
70KhGFA steel
Steel 75
Steel 80
Steel 85
KT-2 steel
KT-3 steel
Steel 55S2A
Steel 3K-7
Steel 40P
Steel 50RA (50P)
50KhG steel
50KhGA steel
50KhGFA steel
Steel 50KhFA (50KhF)
51KhFA steel
Steel 55C2
Steel 60С2Х (60С2ХА; 60С2ХАA)
Steel 55S2GF
Steel 55KhGR
Steel 55KhFA (55KhF)
60G steel
Steel 60C2
Steel 60S2A
Steel 60S2G
Steel 60C2H2A
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 3К-7 |
| Designation GOST Latin | 3K-7 |
| Transliteration | 3K-7 |
| The chemical elements | 3Co-7 |
Description
Steel 3K-7 applies: for the production of cold drawn wire used for the manufacture of springs are wound in the cold state and not subjected to hardening.
Standards
| Name | Code | Standards |
|---|---|---|
| Steel wire medium- and high-carbon | В72 | GOST 9389-75 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu |
|---|---|---|---|---|---|---|---|---|---|
| GOST 9389-75 | 0.68-0.76 | ≤0.03 | ≤0.02 | 0.5-0.8 | ≤0.05 | 0.17-0.37 | ≤0.05 | The rest | ≤0.04 |
Fe is the basis.
