Alloy AK4-1 (1141)

Designation

Name	The value
Designation GOST Cyrillic	АК4-1
Designation GOST Latin	AK4-1
Transliteration	AK4-1
By chemical elements	-

Name	The value
Designation GOST Cyrillic	1141
Designation GOST Latin	1141
Transliteration	1141
By chemical elements	1141

Description

Alloy AK4−1 is used: for the manufacture of plates, sheets, forged blanks; parts for heating aircraft structures, including parts of engines, parts, jet engines; 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; large extruded pipes.

Note

Basic heat-resistant alloy medium strength (σ_in=420 MPa, σ₁₀₀₀^150°= 270 MPa).
ISO 209−1 brand of alloy AK4−1ch is designated 2618.

Standards

Name	Code	Standards
Bars and shapes	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 92093-83, OST 1 92041-90, OST 1 92066-91, OST 1 92067-92, OST 1 90113-86, OST 1 90177-75, OST 1 92007-87, TU 1-2-424-82
Sheets and strips	В53	GOST 17232-99, OST 1 90117-83, TU 1-2-212-79, TU 1-2-464-84, TU 1-2-9-77, TU 1-92-47-77, TU 1-92-48-77, TU 1-804-473-2009
Bars	В55	GOST 21488-97, GOST Р 51834-2001, OST 1 90395-91, TU 1-2-135-75, TU 1-2-315-78
Non-ferrous metals, including rare, and their alloys	В51	GOST 4784-97, OST 1 92014-90, OST 1 90048-90
Processing of metals by pressure. Forgings	В03	OST 1 90073-85
Tubes of non-ferrous metals and alloys	В64	OST 1 92048-90, OST 1 92048-76, TU 1-2-361-79, TU 1-2-365-81, TU 1-2-451-83, TU 1-9-148-76, TU 1-9-507-73

Chemical composition

Standard	Mn	Cr	Si	Ni	Fe	Cu	Al	Ti	Zn	Mg
OST 1 92014-90	≤0.2	-	≤0.35	0.8-1.4	0.8-1.4	1.9-2.7	Rest	≤0.1	≤0.3	1.2-1.8
GOST 4784-97	≤0.2	≤0.1	≤0.35	0.8-1.4	0.8-1.4	1.9-2.7	Rest	0.02-0.1	≤0.3	1.2-1.8
OST 1 90048-90	≤0.1	≤0.1	0.1-0.25	0.9-1.4	0.9-1.4	2-2.6	Rest	0.05-0.1	≤0.1	1.2-1.8

Al is the base.
According to GOST 4784-97 the chemical composition is given for the alloy AK4-1. Mass fraction of each other impurity (not regulated) ≤ 0.05%, total mass fraction of other impurities ≤ 0.10%. The chemical composition of the alloy AK4-1h differs by the admittance of the mass fractions of the elements: silicon = 0.10-0.25%, iron = 0.90-1.30%, magnesium = 1.30-1.80%, zinc ≤ 0.10 %, titanium = 0.04-0.10%, nickel = 0.90-1.20%.
According to OST 1 90048-90 the chemical composition is given for the alloy AK4-1h. Mass fraction of each other impurity (not regulated) ≤ 0.05%, total mass fraction of other impurities ≤ 0.10%.
According to OST 1 92014-90 the chemical composition is given for the alloy AK4-1. Mass fraction of each other impurity (not regulated) ≤ 0.05%, total mass fraction of other impurities ≤ 0.10%.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d	KCU, kJ/m²	HB, MPa
Sheet metal in delivery condition
	≥310	≥380	≥6	-	≥200	109-117
Panel OST 1 90177-75. In the column of the delivery condition includes a direction of cutting out of samples
-	≥323	≥392	≥6	-	-	-
-	≥313	≥372	≥4	-	-	-
Panels are extruded with fins on OST 1 92041-90 in the delivery condition of alloy AK4-1 and AK4-1ch. T1 (quenching + artificial aging)
	≥325	≥380	≥6	-	-	-
Plate in the delivery condition on the other 1-804-473-2009
11-25	≥325	≥390	-	≥6	-	-
25-80	≥295	≥385	-	≥6	-	-
Rolled plates of grade alloy AK4-1ch on the other 1-2-9-77 in the delivery condition. T (quenching + natural ageing)
12-40	≥324	≥392	-	≥6	-	-
Plates according to GOST 17232-99 in the delivery condition. T1: Quenching + artificial aging (samples perpendicular to the plane of the plate)
40-80	-	≥370	-	≥4	-	-
Plates according to GOST 17232-99 in the delivery condition. T1: Quenching + artificial aging (samples transverse)
11-25	≥325	≥390	-	≥6	-	-
25-80	≥295	≥385	-	≥6	-	-
Forgings section up to 350 mm according to OST 1 90073-85. Mode T1: Quenching + artificial aging (in the cross section indicates the direction of the samples)
	≥255	≥375	≥4	-	-	≥109
	≥265	≥375	≥5	-	-	≥109
	≥265	≥375	≥5	-	-	≥109
	≥275	≥390	≥6	-	-	≥109
	≥265	≥375	≥4	-	-	≥109
Extruded normal strength with the cross-sectional area 200 cm2 and a diameter of the circumscribed circle of up to 350 mm. (sample transverse cross-sections show the direction of the sample). Quenching + artificial aging
	-	≥375	≥4	-	-	-
	≥315	≥380	≥5	-	-	-
Extruded normal strength with the cross-sectional area 200 cm2 and a diameter of the circumscribed circle of up to 350 mm. (sample longitudinal cross-section shows the thickness of the shelf). Quenching + artificial aging
≤10	≥305	≥390	≥6	-	-	-
10-150	≥325	≥390	≥8	-	-	-
The pressed bars normal strength in the delivery condition according to GOST 21488-97 (longitudinal samples). T1 (quenching + artificial aging)
100-300	≥275	≥365	≥6	-	-	-
8-100	≥315	≥390	≥6	-	-	-
Large-size extruded tubes according to OST 1 92048-76 in the delivery condition. T1 (quenching + artificial aging)
	≥255	≥373	≥5	-	-	-

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
d₅	Elongation after rupture
d	Elongation after rupture
KCU	Toughness
HB	Brinell hardness number

Physical characteristics

Temperature	Е, HPa	r, kg/m³	R, Mr. · m
20	72	2800	55

A description of the physical symbols

Name	Description
Е	The normal elasticity modulus
r	Density
l	Coefficient of thermal conductivity
R	UD. the resistivity
С	Specific heat