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 sT|s0,2, MPa σU, 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
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU 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.