Type 304 stainless steel is the standard alloy for use in wire rope and cable. It has about the same strength as galvanized wire rope or cable but is much more corrosion resistant. It can be used in most industrial atmospheres and has acceptable corrosion resistance when used in marine and salt water.
316 grade stainless steel is the standard high-corrosion-resistant steel for wire rope and cable. It is resistant to many chemicals in the pulp and paper, photographic, food processing, and textile industries. Type 316 stainless steel wire rope has the best pitting resistance in marine and salt water, and can be used in temperatures up to 900 degrees Fahrenheit.
The vast majority of wire rope specifications are designated with 316 or 304 (and sometimes 302 grade). The basic difference is in the elements that comprise the alloy itself—and 316 stainless wire rope is known to be more corrosion-resistant than 304.
Commonly used in aircraft controls, sailboat rigging, winches, and garage doors, a 7x19 stainless steel wire rope is made up of seven strands with 19 wires in each strand—approximately twice as flexible as a 7x7 construction. Also available in USA-made.