Spring wire sizes and types: Spring wire is used to manufacture springs. This spring wire on a hardness scale is very hard. Typically on the hardness scale their is 1/4 hard, 1/2 hard, 3/4 hard and full hard. With spring wire it is above full hard meaning it is a very hard material. The reason is that spring wire needs to have memory to be elastic so it can bounce back to it's original length. The tensile strengths of spring wire can be found on our properties of common springs material page.
The most common spring wire types used are:
Hard Drawn Wire ASTM A227 Medium carbon steel used in commercial products like toys, pens, indoor use
Music Wire ASTM A228 High Carbon Steel used in exercise equipment, lawn and garden, tools etc.
Stainless Steel 302 ASTM A313 Stainless steel used in marine products, medical devices, outdoor use.
Stainless Steel 316 ASTM A316 Stainless steel used in medical products, earrings,non magnetic applications.
Stainless Steel 17-7PH ASTM A313 High tensile strength stainless steel corrosion resistant and used in high temperature environments.
Phosphor Bronze Grade A B159 Non ferrous alloy wire. Good corrosion resistance and electrical conductivity
Chrome Silicon ASTM A401 High Strength Alloy steel wire used for shock loads and slightly elevated temperatures.