Designation
| Name |
The value |
| Designation GOST Cyrillic |
20880 |
| Designation GOST Latin |
20880 |
| Transliteration |
20880 |
| By chemical elements |
20880 |
Description
Steel 20880 applies: for magnetic circuits of electrical machines and devices.
Note
Steel grooved, undoped silicon without standardization of 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 14-1-3606-83, TU 14-11-245-88, TU 14-1-1271-75 |
| Tape |
В34 |
TU 14-1-2822-79, TU 14-175-85-89 |
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
| Section, mm |
σU, MPa |
d5, % |
| Bars calibrated on delivery |
|
≥350 |
≥4 |
Description mechanical marks
| Name |
Description |
| σU |
Limit short-term strength |
| d5 |
Elongation after rupture |
Technological properties
| Name |
The value |
| Weldability |
Without restrictions. |
