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MBHD Carbon Steel: Medium basic carbon cold drawn spring wire per ASTM 227, suitable for parts subjected to average stress and applications; also suited to static orvery low cycles
Music Wire: Spring wire, per ASTM-228, good for parts subjected to high stresses and requiring good thermal properties. For temperatures up to 250°F
Type 302/304 Stainless Steel: Springs are manufactured to meet ASTM-A313, a high quality wire. For temperatures up to 550°F. Slightly magnetic. It is the most widelyused stainless spring wire because of high corrosion resistance properties and good tensile strength.
Black Oxide Coating (good) or Zinc Plating (better):improves the corrosion resistance of HDMB Carbon Steel and Music Wire
Passivation:an acid treatment performed on Stainless Steel Wire to remove contaminants and improve corrosion resistance
Nickel-coated Stainless Steel Springs: made from Suzuki^™ Wire^®, Nippon-Seisen wire and Sumiden® Type 302 nickel-coated stainless steel for superior corrosionresistance particularly in marine environments. Nickel plating is used in electronics because it provides a good surface for soldering, prevents tarnishing, and conductselectricity well.