It is now regarded as the green metal aluminum, energy saving metal, recycling of the best metal, energy storage metals, light metals, metal inexhaustible, why it enjoys such multi reputation it? Because it has a series of excellent performance, in this talk only briefly introduced in more detail in a future article number.

Density, sometimes it is not standardized light weight, referred to light. Crystal structure calculations, the theoretical density of single crystal aluminum 2698.72kt / m3, 0.34% higher than the single crystal, the density is about 1/3 of steel and copper. This is very important, without which there would be no such thriving aerospace industry today, although we can not say that there would be no aluminum aerospace industry today, but no aluminum, aerospace and would not have prosperity, Punta flourish Bo; aluminum and aluminum alloy no density how today's high-speed train sped swiftly, faster than the speed of the helicopter too!

Moderate mechanical properties. Greater purity aluminum, the lower the mechanical properties, tensile strength can now be made up to 750N / mm2 of engineering alloys, of course, is the individual, the tensile strength of aluminum alloys are most 500N / mm2 or less. Mechanical properties of several different purity aluminum is as follows:

The same as any other metals and alloys, the mechanical properties of aluminum and its alloys also decreases with increasing temperature, even the most heat-resistant high-temperature alloy, its long-term working temperature should not exceed 250 ℃. However, a major drawback of other metals and alloys is that the mechanical properties are as the temperature dropped, the intensity increased, while the elongation and toughness decreased, that hair brittle.

But is not the case of aluminum and aluminum alloys, their mechanical properties increased with temperature drop, while overall rise, which makes them a very good manufacturing cryogenic equipment wonderful material, such as liquefied natural gas cryogenic vessels (LNG) of Connaught large containers, oxygen machine parts, rocket fuel (liquid oxygen and liquid hydrogen) storage tanks.