Alloy Steel 2024 - widely used in the Aerospace industry

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Alloy Steel 2024

Product description

The aluminium copper alloy 2024 is competitive on a strength-to-weight ratio with the higher-strength but heavier titanium and steel alloys and thus has traditionally been the dominant structural material in both commercial and military aircraft. In addition, aluminium alloys are not embrittled at low temperatures and become even stronger as the temperature is decreased, without significant ductility losses, making them ideal for cryogenic fuel tanks for rockets and launch vehicles. The wrought heat treatable 2xxx alloys generally contain magnesium in addition to copper as an alloying element.

Aluminium has many outstanding attributes that lead to a wide range of applications including:
- Good corrosion and oxidation resistance
- High electrical and thermal conductivities
- Low density
- High reflectivity
- High ductility and reasonably high strength
- Relatively low cost

2xxx: Al-Cu Alloys.
The major characteristics of the 2xxx series are:
- Heat treatable
- High strength at room and elevated temperatures
- Typical ultimate tensile strength range: 186–428 MPa (27–62 ksi)
- Usually joined mechanically, but some alloys are weldable
- Not as corrosion resistant as other alloys

Due to their superior damage tolerance and good resistance to fatigue crack growth, the 2xxx alloys are used for aircraft fuselage skins for lower wing skins on commercial aircraft. The alloy 2024-T3 is normally selected for tension-tension applications because it has superior fatigue performance in the 105 cycle range as compared to the 7xxx alloys.

Technical Specification

Specification	Material	Publication Date
WWT 700/3	Tube, Aluminum Alloy, Drawn, Seamless	01/07/2001
QQA 250/4	Aluminum Alloy 2024, Plate and Sheet	01/08/1997
QQA 250/5	Aluminum Alloy Alclad 2024, Plate and Sheet	01/08/1997
QQA 200/3	Aluminum Alloy 2024, Bar, Rod, Shapes, Tube, and Wire, Extruded	03/05/2018
QQA 225/6	Aluminum Alloy, 2024, Bar, Rod, and Wire; Rolled, Drawn, or Cold Finished	01/07/1997
AMS4037	Aluminum Alloy, Sheet and Plate 4.4Cu - 1.5Mg - 0.60Mn (2024; -T3 Flat Sheet, -T351 Plate) Solution Heat Treated	14/06/1940
AMS4165	Aluminum Alloy, Extrusions 4.4Cu – 1.5Mg – 0.60Mn (2024-T3511) Solution Heat Treated, Cold Worked, Stress-Relieved by Stretching, and Straightened	01/06/1960
AMS4120	Aluminum Alloy, Rolled or Cold Finished Bars, Rods, and Wire 4.4Cu - 1.5Mg - 0.60Mn (2024) Solution Heat Treated and Naturally Aged (T4) Solution Heat Treated, Cold Worked, and Naturally Aged (T351)	01/11/1941
AMS4088	Aluminum Alloy, Drawn, Seamless Tubing 4.4Cu - 1.5Mg - 0.60Mn (2024-T3) Solution Heat Treated and Cold Worked	01/01/1942

A four-digit numerical designation system, developed by the Aluminium Association, is used to designate wrought aluminium and aluminium alloys. The first digit defines the major alloying element in the 2xxx through 8xxx alloy series, the second digit in the designation indicates the alloy modification. When the second digit is zero, it indicates the original alloy. The numbers 1 through 9, assigned consecutively, indicate modifications of the original alloy. Explicit rules have been established for determining whether a proposed composition is merely a modification of a previously registered alloy or if it is an entirely new alloy. The last two of the four digits in the 2xxx through 8xxx series have no special significance but serve only to identify the different alloys in the series.

Technical Data

Mechanicals Chemistry

Specification	Tensile Strength	Yield Strength	Elongation
AMS-QQ-A-250/4 (T3)	63 KSI	42 KSI	15%
AMS-QQ-A-250/5 (T3)	59 KSI	39 KSI	15%
AMS-QQ-A-200/3 (T3511)	65 KSI	46 KSI	10%
AMS-QQ-A-200/3 (T3511)	62 KSI	45 KSI	10%
AMS-WWT-700/3 (T3)	64 KSI	42 KSI	12%

Element	Lower %	Upper %
Copper	0.150	0.400
Manganese	-	0.150
Silicon	0.400	0.800
Magnesium	0.800	1.200
Zinc	-	0.250
Chromium	0.040	0.350
Aluminium	Remainder	Remainder
Iron	-	0.700

Aerocom Stock List

Tube Sheet & Plate Bar

WT (Inches)
OD (Inches)	0.028	0.035	0.049	0.058	0.065	0.075	0.083	0.095	0.120	0.156	0.188	0.250
0.250			X		X
0.375	X
0.500		X	X	X	X
0.625							X
0.750					X		X	X	X
20mm							X
22mm				X
1.000		X	X	X	X		X	X	X
1.250		X			X			X		X	X
1.250 SQ					X
32mm							X
1.375
1.500
1.625					X
1.750							X		X	X	X
1.875				X
2.000				X	X	X		X	X			X
2.500								X	X

Temper
Thickness (Inches)	T3 BARE	T3 CLAD	O (Annealed) CLAD	T851
		X
0.025		X
0.032	X	X	X
0.040	X	X	X
0.050	X	X	X
0.063	X	X
0.071	X	X	X
0.080	X	X	X
0.090		X
0.100		X
0.125		X
		X
0.190	X
1.250				X

Temper
Diameter (Inches)	T351	T3511	T3510	T4	T851
0.250		X
0.375 x 2.000				X
0.500		X			X
0.500 SQ		X
0.500 x 0.750	X
0.625		X
0.687					X
0.750	X	X			X
0.750 x 1.000	X
1.000		X			X
1.000 SQ		X
1.000 x 4.000	X
1.062		X
1.250	X
1.250 x 3.000					X
1.250 x 4.000					X
1.500	X	X
1.500 SQ					X
1.500 x 4.000
1.562		X
2.000 SQ	X
2.362			X
2.500		X
3.000 x 4.000		X
3.250					X
3.625					X

Our Approvals

Leonardo Aerostructures	Leonardo Aircraft	Leonardo Helicopters	Airbus Helicopters
UTC	SAFRAN	GE Power	ISO9001:2015
AS9120B	Westland SQA50	Britten-Norman

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