because it is safe and strong
Making it out of cheese simply would not produce the same tone.
steel is a good material for a bumper as it is cheap
Steel and geometry, tension, straight, aches and channels make a good bridge
That could depend on several factors like essential life span, carrying capacity and length.
Yes, 18/10 stainless steel is a good material for kitchen utensils because it is durable, resistant to corrosion, and easy to clean.
True the prices vary according to the material used, steel, silver, brass, iron etc. If you are looking for some good light material that not too heavy or expensive then I suggest you go for the polished steel finished trays.
cheapest material is Mild steel having very good properties of shaft.
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Kevlar would be a good choice, preferably backed with steel/ceramic inserts for extra protection.
The best material for guitar strings is generally considered to be steel, specifically stainless steel or nickel-plated steel. These materials provide a good balance of durability, tone, and playability for most guitarists.
The only practical restriction of the building material is durability in water - untreated paper would not be a good choice. Otherwise you can use any material you like. Commonest materials - various plastics, wood and steel.
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