With the lighter aluminum, a better power to weight ratio can be achieved, which can improve fuel economy. This is an advantage only if driver safety is maintained.
Steel.
The main test for aluminum is by using a magnet. Aluminum is not magnetic. If a steel is tested and the magnet clings to it then that is a good indication that it is not aluminum.
using a magnet: steel atracts and aluminum doesn't
steel is good conductor of eletricity but better conductors are aluminum and copper. steel is used only for low voltage level. it consume more useful power i.e. losses are more in using steel
Aluminium is more expensive than Steel
What I do know is that apple has been using Stainless steel and aluminum.
Aluminum is used for cylinder heads and engine blocks to make the entire engine lighter. A lighter engine is desired for a number of reasons, including better gas mileage, better handling, better braking response and better chassis balance. Since the aluminum used in standard engines and cylinder heads does not provide a good surface for high-friction areas, such as valve guides and piston cylinders, where aluminum-to-aluminum surfaces would wear out too quickly, other metals such as steel is used for the aluminum component to slide on. For example, an aluminum piston rides inside a steel liner which is inserted into the aluminum engine block. Since aluminum and steel respond very differently to the heat and cold in an engine, very careful design engineering is required when using these two metals together.
In 1947, the steel shortage forced Daisy to use the aluminum lever.
Use a magnet. Magnets stick to steel but don't stick to aluminum. Stainless is very weakly magnetic at best. Best to identify aluminum from stainless by weight (aluminum is much lighter) or by hardness (aluminum is much softer; scratches more easily). ***************** Though magnet test can show the difference between magnetic steel and aluminum, it cannot show the difference between non-magnetic steel and aluminum. In this case you can tell the difference by 1. weight , since aluminum has density 2700 kg/m3 and steel (magnetic or not) 7500 2. hardness, using a knife or something similar, since aluminum is softer than steel
Depends on what you are using if for.
no
This has not happened yet.