Alloy D19ch
Designation
| Name |
The value |
| Designation GOST Cyrillic |
Д19ч |
| Designation GOST Latin |
D19ch |
| Transliteration |
D19ch |
| The chemical elements |
Д19ч |
Description
Alloy D19ch used: for the production of power subassemblies of aircraft, car bodies, pipes, operating at temperatures up to +200−250 °C; profiles with cross-sectional area of 200 cm2 and a diameter of circumcircle up to 350mm suitable for use in the aviation industry and special machine building industries; moulded panels of constant cross section with longitudinal fins in the aircraft industry, is made by a sweep of extruded finned tubes in the plane of the width of the fabric up to 2100 mm.
Standards
| Name |
Code |
Standards |
| Sectional and shaped rolling |
В52 |
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 92041-90, OST 1 90113-86, OST 1 90177-75 |
| Non-ferrous metals, including rare metals, and their alloys |
В51 |
GOST 4784-97, OST 1 90048-90 |
| Sheets and stripes |
В53 |
OST 1 90246-77, OST 1 90166-75, OST 1 90070-92, TU 1-2-298-80, TU 1-92-161-90 |
| Bars |
В55 |
OST 1 90395-91 |
Chemical composition
| Standard |
Mn |
Si |
Fe |
Cu |
Al |
Ti |
Zn |
Mg |
Be |
| OST 1 90048-90 |
0.4-0.9 |
≤0.2 |
≤0.3 |
3.8-4.3 |
The rest |
≤0.1 |
≤0.1 |
1.7-2.3 |
0.0002-0.005 |
| GOST 4784-97 |
0.4-0.9 |
≤0.2 |
≤0.3 |
3.8-4.3 |
The rest |
≤0.1 |
≤0.1 |
1.7-2.3 |
0.0002-0.005 |
Al is the base.
According to GOST 4784-97 and OST 1 90048-90, the mass fraction of each other impurity (not regulated) ≤ 0.05%, the total mass fraction of other impurities ≤ 0.10%. Beryllium is not determined by chemical analysis, but is introduced by calculation.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
| Panel OST 1 90177-75. In the column of the delivery condition includes a direction of cutting out of samples |
| - |
≥313 |
≥421 |
≥10 |
| - |
≥294 |
≥392 |
≥7 |
| Panels are extruded with fins on OST 1 92041-90 on delivery |
|
≥255 |
≥390 |
≥10 |
|
≥295 |
≥410 |
≥10 |
| Extruded at OST 1 90113-86 normal strength with the cross-sectional area 200 cm2 and a diameter of circumcircle up to 350mm (sample a longitudinal, in cross-section shows the thickness of the shelf). Quenching + natural aging |
| ≤5 |
≥295 |
≥390 |
≥10 |
| 10-20 |
≥305 |
≥420 |
≥10 |
| 20-40 |
≥305 |
≥440 |
≥10 |
| 5-10 |
≥295 |
≥410 |
≥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 |
Е, ГПа |
r, кг/м3 |
R, НОм · м |
| 20 |
70 |
2760 |
61 |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
