Alloy 1925
Designation
| Name |
The value |
| Designation GOST Cyrillic |
1925 |
| Designation GOST Latin |
1925 |
| Transliteration |
1925 |
| The chemical elements |
1925 |
Description
Alloy 1925 applies: for the production of profiles and pipes; making various nesvorny and welded structures in construction, mechanical engineering and aircraft construction.
Note
The alloy system Al-Zn-Mg.
ISO 209−1 alloy brand 1915 is designated AlZnMg1,5Mn.
Standards
| Name |
Code |
Standards |
| Pipes from non-ferrous metals and alloys |
В64 |
GOST 18482-79, OST 4.021.121-92, TU 1-2-456-83, TU 1-2-51-78, TU 1-804-019-89, TU 1-8-099-90 |
| Bars |
В55 |
GOST 21488-97, OST 1 92019-72 |
| Non-ferrous metals, including rare metals, and their alloys |
В51 |
GOST 4784-97, OST 4.021.009-92 |
| Sectional and shaped rolling |
В52 |
GOST 8617-81, GOST 13616-97, GOST 13617-97, GOST 13618-97, GOST 13619-97, GOST 13620-90, GOST 13621-90, GOST 13622-91, GOST 13623-90, GOST 13624-90, GOST 13737-90, GOST 13738-91, GOST 17575-90, GOST 17576-97, GOST 29296-92, GOST 29303-92, GOST Р 50066-92, GOST Р 50067-92, GOST Р 50077-92, OST 1 92093-83, OST 1 92022-73, OST 4.021.133-92, OST 4.021.134-92, TU 1-3-18-92 |
Chemical composition
| Standard |
Mn |
Cr |
Si |
Fe |
Cu |
Al |
Ti |
Zn |
Zr |
Mg |
| GOST 4784-97 |
0.2-0.7 |
≤0.2 |
≤0.7 |
≤0.7 |
≤0.8 |
The rest |
≤0.1 |
3.4-4 |
0.1-0.2 |
1.3-1.8 |
Al is the base.
According to GOST 4784-97, the mass fraction of each other impurity (not regulated) ≤ 0.05%, the total mass fraction of other impurities ≤ 0.10%.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
| Extruded normal strength of the alloy 1925 to GOST 8617-81 in the delivery condition (longitudinal samples) |
| 12 |
≥176 |
≥275 |
≥10 |
| 12 |
≥196 |
≥343 |
≥9 |
|
- |
≤294 |
≥12 |
| 12-150 |
≥176 |
≥275 |
≥10 |
| 12-150 |
≥196 |
≥343 |
≥10 |
| Extruded normal strength of the alloy 1925С according to GOST 8617-81 in the delivery condition (longitudinal samples) |
| 100 |
≥200 |
≥310 |
≥10 |
| The pressed bars normal strength in the delivery condition according to GOST 21488-97 (longitudinal samples) |
| 8-300 |
- |
≥295 |
≥12 |
| 8-15 |
≥165 |
≥275 |
≥10 |
| 8-15 |
≥195 |
≥345 |
≥10 |
| 130-200 |
≥245 |
≥355 |
≥8 |
| 8-130 |
≥245 |
≥375 |
≥8 |
| Tubes extruded in the state of delivery according to GOST 18482-79 (samples, in cross-section shows the thickness of the wall) |
|
≥145 |
≥245 |
≥10 |
|
≥195 |
≥335 |
≥10 |
| 12.5-40 |
≥155 |
≥255 |
≥10 |
| 12.5-40 |
≥195 |
≥335 |
≥10 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
Physical characteristics
| Temperature |
r, кг/м3 |
| 20 |
2770 |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
Technological properties
| Name |
The value |
| Weldability |
Well welded alloy system Al-Zn-Mg, under certain conditions, can be successfully used in the construction instead of welding AMg6 alloy, which is inferior to the alloy of 1925 on the strength characteristics, especially yield stress. |
| Pressure treatment |
1925 alloy well deformed in the hot and cold States. The temperature interval of hot deformation is in the range of 350-480 °C. Important advantages of the grade is the extrusion of profiles and tubes with high speeds the expiry of 15-30 m/min above the acceptable during the pressing of alloys D1, AMg6 5-10 times. |
| Features of heat treatment |
Heat-treatable alloy. Alloy 1925 is zamotaylova, i.e. the strength characteristics depend little on the kind of quenching medium (water, air). As a result, pressed extra virgin profiles with a flange width of 10 mm may not be subject to hardening, because the cooling after extrusion in the air gives almost the same structure and the same properties as quenching in water after heating in the hardening furnaces. Alloy hardened during the aging process, as at room and at elevated temperatures. |
| Corrosion resistance |
The alloy has good resistance to corrosion, higher than the alloy D1. |
