Stainless steel is strong and has excellent chemical and corrosion resistance. Its temperature range is –425° to 1200°F (–254° to 649°C). Stainless steel is an alloy of steel that contains more than 10.5% chromium. It has the strength and durability of steel while also providing excellent corrosion resistance, making it the most suitable fitting material for hydraulic applications where the fluid or surrounding environment is corrosive. Stainless steel’s toughness is significantly better than carbon steel’s at low temperature.
Industrial stainless-steel fittings are often rated to 10,000 psi. Specially designed stainless steel fittings can have pressure ratings as high as 20,000 psi.
Typically, stainless steel fittings are more expensive than those made from other materials. However, many applications require its corrosion resistance — oil, gas, and offshore equipment; chemical processing; food manufacturing; medical and instrumentation; agricultural fertilizer; and marine applications.