439 Stainless Steel Coil Type 439, a titanium-stabilized 18% chromium alloy, is a ferritic stainless steel designed to resist corrosion in a wide range of oxidizing environments from fresh water to boiling acids.Type 439 is also used in many oxidizing environments, where Type 304 is considered adequate for general corrosion resistance, but is subject to chloride stress corrosion cracking. This variation does not require post-weld annealing to restore ductility or provide resistance to intergranular corrosion. Excellent resistance to stress corrosion cracking, good weldability, high thermal conductivity and low thermal expansion properties make Type 439 stainless steel ideal for many applications. Application Appliances Hot water tanks, home furnaces Automotive Hard-to-form exhaust system components, tube manifolds, mufflers Heat exchangers for power generation
