For example, Aluminum is easily machined at $5-$10 per pound. Similarly, Steel will cost $8-$16 per pound. Stainless steel is expensive ranging from $1.87 to $3.14 per pound. Moreover, plastics are a little cheaper, ranging from $1 to $2 per pound for ABS. ...
Type III and Type IV hydrogen pressure vessels, consisting of aluminum alloys or polymer liners and carbon fiber winding layers, are currently the most common means of storing hydrogen in vehicles [143]. First, the metal liner used in Type III is most commonly made of aluminum alloys 6061 ...