Alloy M40

Designation

Name	The value
Designation GOST Cyrillic	М40
Designation GOST Latin	M40
Transliteration	M40
By chemical elements	Cu40

Description

Alloy M40 is used: for the manufacture of welded structures operating at cryogenic and elevated temperatures; 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.

Note

M40 — alloy system Al-Cu-Mg aluminum of high heat resistance, hardened by heat treatment (quenching + natural ageing).

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 92066-91, OST 1 90113-86, OST 1 90259-77
Sheets and strips	В53	OST 1 90261-77
Bars	В55	OST 1 90395-91

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d
The leaves hardened and naturally aged at М40АТ OST 1 90261-77. The condition of transverse samples: Annealing in air, 507±3 °C (exposure in technical documentation of manufacturer) + Natural aging
0.8-1.9	≥162	≥314	-	≥13
1.9-5	≥177	≥334	-	≥12
The leaves hardened and naturally aged at М40АТ OST 1 90261-77. The condition of transverse samples: Annealing in air, 507±3 °C (exposure in technical documentation of manufacturer) + Artificial aging at 175±5 °C (not earlier than 7 days after quenching, the holding time 20 hours)
0.8-1.9	≥245	≥353	-	≥14
1.9-4	≥255	≥373	-	≥12
4-5	≥255	≥373	-	≥9
The leaves hardened and naturally aged at М40АТ OST 1 90261-77. The condition of transverse samples: Annealing in air, 507±3 °C (exposure in technical documentation of manufacturer) + Artificial aging at 200±5 °C (not earlier than 7 days after quenching, the holding time 8-10 hours)
0.5-1.9	≥285	≥353	-	≥8
1.9-4	≥285	≥373	-	≥7
4-6	≥285	≥373	-	≥6
Leaves of cold-worked psle quenching and naturally aged for М40АТН OST 1 90261-77. The condition of transverse samples: Annealing in air, 507±3 °C (exposure in technical documentation of manufacturer) + cold deformation + Artificial aging at 175±5 °C (not earlier than 7 days after quenching, the holding time 20 hours)
1.5-1.9	≥285	≥383	-	≥12
1.9-7	≥294	≥402	-	≥11
Leaves of cold-worked psle quenching and naturally aged for М40АТН OST 1 90261-77. The condition of transverse samples of cold-worked after quenching in air, 507±3 °C (exposure in technical documentation of manufacturer) + Natural aging
1.5-1.9	≥285	≥383	-	≥8
1.9-7	≥294	≥402	-	≥7
The sheets annealed at М40АМ OST 1 90261-77. The condition of transverse samples: Annealing (homogenization) cast ingots at 480-500 °C (aging 48 hours)
0.8-4	-	≤250	-	≥12
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 + natural aging
	≥175	≥315	≥12	-
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
	≥265	≥375	≥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
d₅	Elongation after rupture
d	Elongation after rupture

Technological properties

Name	The value
Weldability	Without restrictions.
Particularities of production of goods	Sheets OST 1 90261-77 are delivered: the method of manufacture with normal plating - A (М40А); material condition: annealed - M (М40АМ), quenched and naturally aged - T (М40АТ), cold-worked after quenching and natural aging with the degree of deformation of 7-8 % - TN (М40АТН); for precision manufacturing - normal accuracy; quality of surface finish - ordinary finish, without additional symbols.