Aluminum specifications designate aluminum alloys in the following way:
Copper - One of the most important additions to aluminum. It has significant solubility and a substantial strengthening effect through the agehardening characteristics it imparts to aluminum.
Non Heat-Treatable Aluminum Alloys. The letter "H" is always followed by 2 or 3 digits. The first digit indicates the particular method used to obtain the temper as follows: H1-means strain hardened only, H2-means strain hardened, then partially annealed and H3-means strain hardened, then stabilized. The temper is indicated by the second digit as follows: 2-1/4 hard; 4-1/2 hard; 6-3/4 hard; 8-full hard and 9-extra hard which means that added digits indicate modification of standard practice. The non heat-treatable alloys are mainly found in the 1xxx, 3xxx, 4xxx, and 5xxx alloys series depending upon their major alloying elements.
Heat-Treatable Aluminum Alloys (e.g. F, O or T): The letter "T" is always followed one or more digits. These digits indicate the method used to produce the stable tempers, as follows: T3-Solution heat treated and then cold worked, T4-Solution heat treated and then naturally aged, T5-Artificially aged only, T6-Solution heat treated and then artificially aged etc. The heat-treatable alloys are found primarily in the 2xxx, 6xxx and 7xxx alloys series
Non Heat Treatable Alloys
1100 - Commercially pure aluminum. Excellent corrosion resistance, workability and weldability. 14,000 to 24,000 psi.
2011 - This alloy can be readily hot worked at temperatures from 500° to 900° F. Its cold workability is good in the T4 and T451 tempers; fair in the T3 temper; and poor in the T8 temper.
2017 - This alloy has good formability. Cold working (shaping, bending, etc.) can be readily accomplished by conventional means. Cold working is easiest when the alloy is in the T4 temper.
3003 - Alloyed with 1,2% manganese. Very Good workability, weldability and corrosion resistance. Tensile strength range 17,000 to 30,000 psi .
5005 - Alloyed with .8% magnesium. Excellent workability, weldability and corrosion resistance. Tensile strength range 18,000 to 30,000 psi .Aluminium alloy 5005 is used in decorative and architectural applications 20 that require an anodized finish.
5052 - Alloyed with 2.5% magnesium. Very good corrosion resistance, good workability, weldability and strength. Tensile strength between 31,000 to 44,000 psi. Aluminium alloys 5052, 5251, 5754 are very similar grades, only differing in 20 the amount of magnesium. 5052 has 2.5% magnesium and is commonly used in the 20 U.S.; 5251 has 2% magnesium and is commonly used in the UK; and 5754 has 3% 20 magnesium and is commonly used in Europe. Due to their formability, corrosion 20 resistance and weldability these grades are commonly used in pressure vessels, 20 tanks, fitting, boat hulls, and van bodies. Their salt water corrosion 20 resistance is better than the 1200 grade and their strength is better than the 20 3003 grade.
5083 - Alloyed with 4.45% magnesium, .65 % manganese and .15% chromium. Excellent weldability, light weight and good corrosion resistance. Tensile strength between 40,000 to 59,000 psi .
5086 - Alloyed with 4.0% magnesium, .45% manganese and .15% chromium. Very good corrosion resistance, good workability. Tensile strength between 40,000 to 54,000 psi.
5454 - Alloyed with 2.7% magnesium, 0.8% manganese and 0.12% chromium. Good formability, weldability and corrosion resistance. Often used for pressure vessels. Tensile strength between 36,000 to 47,000 psi.
Heat Treatable Alloys
2024 - Alloyed with 4.5% copper. Fair workability and corrosion resistance. Used for structural applications. Tensile strength between 30,000 to 63,000 psi.
4032 - This alloy is typically hot worked, not cold worked. Hot working temperature range is 700° to 950° F.
6013 - This alloy has good cold-forming qualities. Difficult cold-forming operations, however, may require intermediate anneals in which case, re-solution heat treating and T6 temper aging should be performed.
6061 - alloyed with 1.0% magnesium and 0.6% silicon. Good formability, weldability and corrosion resistance. Very good machine-ability. Yield between 7,000 to 39,000 psi.
6063 - Good Formability
6262 - Cold-working characteristics are fair for the following tempers: T6, T651, T6510, and T6511. Cold-working characteristics are poor for T9 temper.
7068 is the strongest commercially available aluminium alloy. 7068-T6511 has typical ultimate tensile strength of 103 ksi (710 MPa) versus a similar product produced from 7075-T6511 that would have a typical ultimate 20 tensile strength of 93 ksi (640 MPa). Typical yield strength for alloy 20 7068-T6511 is 99 ksi (680 MPa) versus 86 ksi (590 MPa) for a 20 similar product produced from 7075-T6511 Primarily developed for ordnance applications, 20 alloy 7068 is now being used or considered for markets like the aerospace and automotive industries (valve body and connecting rod applications), as well as recreational products (bicycles). During the mid-1990s, the ordnance industry requested a higher-strength, lightweight, lead-free aluminium alloy with corrosion resistance equal to 7075-T6511.
7075 - Alloyed with zinc, magnesium, copper and chromium. Poor formability, good machine ability. Yield between 32,000 and 76,000 psi. 7075-T6 is one of the most used 7000 series aluminum alloys and is also one 20 of the strongest alloys overall.
The Aluminum Association (AA) has adopted a nomenclature similar to that of wrought 20 alloys. British Standard and 20 DIN have different designations. In the AA system, the second two digits reveal 20 the minimum percentage of aluminium, e.g. 150.x correspond to a minimum of 99.50% aluminium. The digit after the decimal point takes a value of 0 or 1, 20 denoting casting and ingot respectively. 20 The main alloying elements in the AA system are as follows: