Steel 68A
Designation
| Name |
The value |
| Designation GOST Cyrillic |
68А |
| Designation GOST Latin |
68A |
| Transliteration |
68A |
| The chemical elements |
68 |
Description
Steel 68A applies: for the production of hot-rolled billet and heat-treated wire diameter 1.2−5.5 mm, intended for the manufacture of springs.
Standards
| Name |
Code |
Standards |
| Steel wire medium- and high-carbon |
В72 |
GOST 1071-81 |
| Bulls. Blanks. Slabs |
В31 |
TU 14-1-1698-76 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
Al |
| GOST 1071-81 |
0.65-0.7 |
≤0.025 |
≤0.025 |
0.4-0.55 |
≤0.12 |
0.15-0.25 |
≤0.2 |
The rest |
≤0.15 |
≤0.05 |
Fe is the basis.
Mechanical characteristics
| Section, mm |
σB, MPa |
| The wire spring heat-treated in the delivery condition according to GOST 1071-81 |
| 1.2-5.5 |
2060-1270 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| σB |
Limit short-term strength |
