SEA-CURE® stainless steel is a super ferritic alloy designed for high resistance to chloride corrosion, especially in seawater. Commercially introduced in 1979, SEA-CURE® stainless has been a success story, with more than 65,000,000 feet (~20,000,000meters) of the alloy operating in various applications around the world. These include seawater cooled steam condensers, feedwater heaters, chemical heat exchangers and medical devices. During the past twenty years the composition was refined to produce today’s high performance alloy. SEA-CURE® stainless is unique in the stainless steel family because of this excellent chloride pitting and crevice corrosion resistance, exceptionally high strength, low work hardening rate, extremely high modulus of elasticity and exceptional resistance to stress corrosion cracking. The combination of high elasticmodulus and high strength allows the use of thinner cross section tubing without vibration.

SEA-CURE® stainless is a patented alloy made exclusively by Plymouth Tube Company. It’s composition is given in Table 1. Plymouth manufactures tubing in sizes from 1/2 to 2-1/2 inches (12 – 65 mm) in diameter, and in continuous lengths up to 150 feet (45 m). To produce feedwater heater tubing Plymouth has state-of-the-art U-bending and stress relieving equipment. Such tubing is used in fossil, nuclear, geothermal and hydroelectric power stations throughtout the world.