Designation
| Name |
The value |
| Designation GOST Cyrillic |
18ЮА |
| Designation GOST Latin |
18JuA |
| Transliteration |
18YuA |
| By chemical elements |
18Al |
Description
18JUA steel is used: for the manufacture of hot-rolled bars intended for the manufacture of clad strips by hot rolling; cold rolled sheets for the manufacture of gas cylinders.
Note
Structural carbon steel of high quality.
Standards
| Name |
Code |
Standards |
| Tape |
В34 |
GOST 2284-79, GOST 26853-86, TU 14-4-762-76, TU 14-4-1239-83 |
| Sheets and strips |
В33 |
GOST 803-81, TU 14-1-4516-88 |
| Bars and shapes |
В32 |
TU 14-1-4931-90, TU 14-1-4437-88 |
Mechanical properties
| σU, MPa |
d4 |
| Cold-rolled steel strip of 0.1-4.0 mm in the delivery state according to GOST 2284-79 |
| 490-830 |
- |
| Sheet cold-rolled steel in delivery condition (autogeny and trained) on the other 14-1-4931-90. |
| 330-450 |
≥32 |
Description mechanical marks
| Name |
Description |
| σU |
Limit short-term strength |
| d4 |
Elongation after rupture |
Technological properties
| Name |
The value |
| Macrostructure and pollution |
Non-metallic inclusions in steel on the other 14-1-4931-90: oxides and sulfides must not exceed 3 points according to GOST 1778. Presence of oxides and sulphides of not more than 4 points up to 20% of the number of samples tested. |
| Microstructure |
Microstructure of rolled on the other 14-1-4931-90 should have a grain size of the ferrite 7-9 points according to GOST 5639. Allowed the presence of grain of the sixth grade in the amount of not more than 50% in field of view. Allowed the grain is elongated. Form of perlite according to GOST 806 - rows A, B to points 3, inclusive. The depth of the zone of complete decarburization of the surface should not be more than 0.06 mm. |
