Designation
| Name |
The value |
| Designation GOST Cyrillic |
21880 |
| Designation GOST Latin |
21880 |
| Transliteration |
21880 |
| By chemical elements |
21880 |
Description
21880 steel is used: for magnetic circuits of electrical machines and devices.
Note
Steel grooved, undoped silicon with specified ageing coefficient, coercive force in open circuit ≤ 80 A/m.
Standards
| Name |
Code |
Standards |
| Bars and shapes |
В22 |
GOST 1133-71, GOST 2590-2006, GOST 2591-2006 |
| Sheets and strips |
В33 |
GOST 4405-75 |
| Bars and shapes |
В32 |
GOST 7417-75, GOST 11036-75, TU 14-11-245-88 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Si |
Fe |
Cu |
| GOST 11036-75 |
≤0.035 |
≤0.03 |
≤0.02 |
≤0.3 |
≤0.3 |
Rest |
≤0.3 |
Fe is the basis.
Mechanical properties
| σU, MPa |
d5, % |
| Bars calibrated on delivery |
| ≥350 |
≥4 |
Description mechanical marks
| Name |
Description |
| σU |
Limit short-term strength |
| d5 |
Elongation after rupture |
