Steel 20JUA
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 20ЮА |
| Designation GOST Latin | 20JuA |
| Transliteration | 20YuA |
| By chemical elements | 20Al |
Description
20JUA steel is used: for the production of sheet metal 2 mm 4−14 category, intended for the manufacture of various parts by cold forming.
Standards
| Name | Code | Standards |
|---|---|---|
| Sheets and strips | В23 | GOST 19903-90, TU 14-1-4632-93 |
| Sheets and strips | В33 | GOST 4041-71, TU 14-106-328-89 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | N | As | Al |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GOST 4041-71 | 0.16-0.22 | ≤0.025 | ≤0.02 | 0.25-0.45 | ≤0.1 | ≤0.07 | ≤0.15 | Rest | ≤0.2 | ≤0.006 | ≤0.08 | 0.02-0.08 |
Fe is the basis.
Mechanical properties
| Section, mm | σU, MPa | d5, % | d10 | HB, MPa | HRB |
|---|---|---|---|---|---|
| Sheet metal class 2 heat treated (annealing, normalization, high tempering or normalizing + tempering) in the delivery state according to GOST 4041-71 | |||||
| 4-14 | 340-490 | ≥28 | ≥24 | ≤127 | ≤71 |
Description mechanical marks
| Name | Description |
|---|---|
| σU | Limit short-term strength |
| d5 | Elongation after rupture |
| d10 | Elongation after rupture |
| HB | Brinell hardness number |
| HRB | Rockwell hardness (indenter steel, spherical) |
