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Aluminium 6351 pipe is a heat-treatable wrought alloy that finds extensive use in various industrial applications. It is categorized under UNS A96351 and is known for its remarkable combination of high strength, good ductility, and excellent weldability. Moreover, this alloy exhibits superior corrosion resistance and heat resistance, making it highly suitable for machining and welding applications in industries like automotive, aerospace, and chemicals. Let's explore the fundamental aspects of the 6351 Alloy.
Aluminum alloy 6351 is an Al-Mg alloy known for its favorable workability and corrosion resistance, making it highly weldable using all methods. Among the 6xxx series alloys, 6351 boasts high strength, surpassing that of 6061 but falling slightly below the 6082 alloys. For instance, the 6351-t6 variant exhibits a minimum tensile strength of 295 MPa and excellent extrusion formability. When in temper T6, aluminum grade 6351 demonstrates exceptional mechanical properties along with reasonable corrosion resistance. Gas cylinders made from 6351-T6 conform to ASTM B221, ASTM B241, ASTM B429, and other relevant standards.
These high-pressure aluminum alloy gas cylinders, formed through seamless pressing of aluminum plates, have found widespread usage in handling various industrial gases such as special gases, standard gases, mixed gases, and high-purity gases like dry air, carbon monoxide, oxygen, helium, ethylene, methane, and carbon dioxide. The aluminum alloy gas cylinders possess several advantages, including excellent low-temperature impact resistance, lightweight properties (lighter than carbon steel and manganese steel), and corrosion resistance.
Available in different specifications, aluminum alloy 6351 can be obtained in various sizes and tempers like T6, which involves solution heat treatment followed by artificial aging. The specifications include:
Element | Content (%) |
---|---|
Aluminum, Al | 97.8 |
Silicon, Si | 1 |
Manganese, Mn | 0.6 |
Magnesium, Mg | 0.6 |
Properties | Metric | Imperial |
---|---|---|
Density | 2.6-2.8 g/cc | 0.0939- 0.101 lb/in3 |
Properties | Metric | Imperial |
---|---|---|
Tensile strength | 250 MPa | 36260 psi |
Yield strength | 150 MPa | 21756 psi |
Shear strength | 200 MPa | 29008 psi |
Fatigue strength | 90 MPa | 13054 psi |
Elastic modulus | 70-80 GPa | 10153-11603 ksi |
Poisson’s ratio | 0.033 | 0.033 |
Elongation | 20% | 20% |
Hardness | 95 | 95 |
Properties | Conditions | ||
---|---|---|---|
T (ºC) | Treatment | ||
Thermal conductivity | 176 W/m-K | 25 | T6 |