Alloy 1915

Designation

Name	The value
Designation GOST Cyrillic	1915
Designation GOST Latin	1915
Transliteration	1915
By chemical elements	1915

Description

Alloy 1915 used: for the manufacture of pipes and fittings special branches of engineering; the manufacture of various nesvorny in construction, mechanical engineering and aircraft construction; large extruded tubes; extruded by hot extrusion of profiles of constant cross section for use in enclosing building constructions and products.

Note

The alloy system Al-Zn-Mg.
ISO 209−1 alloy brand designation in 1915 has AlZn4,5Mg1,5Mn and 7005.

Standards

Name	Code	Standards
Tape	В54	GOST 13726-97, OST 1-92006-79
Sheets and strips	В53	GOST 17232-99, GOST 21631-76, OST 4-021.049-78, OST 4.021.047-92, TU 1-2-390-79, TU 1-2-84-85, TU 1-804-473-2009
Tubes of non-ferrous metals and alloys	В64	GOST 18482-79, OST 1 92048-90, OST 1 92048-76, OST 4.021.121-92, TU 1-2-162-79, TU 1-2-393-79, TU 1-5-211-83, TU 1-83-26-75, TU 1-9-483-77, TU 1-9-506-74
Bars	В55	GOST 21488-97, OST 1 92019-72, TU 1-2-253-78
Non-ferrous metals, including rare, and their alloys	В51	GOST 4784-97, OST 1 92014-90, OST 4.021.009-92
Bars and shapes	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, GOST 22233-93, GOST 22233-83, OST 1 92093-83, OST 1 92022-73, OST 4.021.133-92

Chemical composition

Standard	Mn	Cr	Si	Fe	Cu	Al	Ti	Zn	Zr	Mg
TU 1-804-473-2009	0.2-0.7	0.06-0.2	≤0.35	≤0.4	≤0.1	Rest	0.01-0.06	4-5	0.08-0.2	1-1.8

Al is the base.
According to GOST 4784-97, the mass fraction of each other impurity (not regulated) is ≤ 0.05%, the total mass fraction of other impurities is ≤ 0.15%.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d
The tape is able to supply for OST 1-92006-79
1-10.5	≥164.6	≥264.6	≥10
1-4.5	-	≤245	≥10
1-10.5	≥196	≥313.6	≥10
Sheet metal in delivery condition according to GOST 21631-76, OST 4.021.047-92 tape according to GOST 13726-97 (samples transverse)
5-10	315-265	-	≥10
1-4.5	-	≤245	≥10
1-10.5	≥165	≥275	≥10
1-10.5	≥195	≥315	≥10
Plate in the delivery condition on the other 1-804-473-2009
11-20	≥195	≥315	≥10
11-20	≥165	≥275	≥10
Plates according to GOST 17232-99 in the delivery condition (transverse specimens)
11-20	≥195	≥315	≥10
11-20	≥165	≥275	≥10
Extruded normal strength according to GOST 8617-81 in the delivery condition (longitudinal samples)
12	≥167	≥265	≥10
12	≥196	≥314	≥10
	≥176	≤277	≥12
150	≥176	≥275	≥10
150	≥216	≥343	≥10
12-150	≥245	≥373	≥8
The extruded profiles according to GOST 22233-93 in the delivery condition. Without heat treatment with natural aging 30-35 days
12	≥196	≥314	≥10
The pressed bars normal strength in the delivery condition according to GOST 21488-97 (longitudinal samples)
8-300	-	≥275	≥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)
	≥155	≥265	≥10
	≥195	≥315	≥10
	≥165	≥275	≥10
	≥215	≥355	≥10
Large-size extruded tubes according to OST 1 92048-76 on delivery
	≥196	≥314	≥10
	≥216	≥353	≥10

Description mechanical marks

Name	Description
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	Limit short-term strength
d	Elongation after rupture

Physical characteristics

Temperature	r, kg/m³
20	2770

A description of the physical symbols

Name	Description
Е	The normal elasticity modulus
r	Density
l	Coefficient of thermal conductivity
С	Specific heat

Technological properties

Name	The value
Weldability	Well welded alloy system Al-Zn-Mg and under certain conditions can be successfully used in the construction instead of welding AMg6 alloy, which is inferior to the alloy of 1915 on the strength characteristics, especially yield stress.
Pressure treatment	1915 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 1915 is zamotaylova, i.e. the strength characteristics depend little on the kind of quenching medium (water, air). As a result, the extruded 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.