ASTM ASME 443 Stainless Steel Pipes & Tubes

ASTM/ASME 443 Stainless Steel Pipes & Tubes are advanced ferritic (UNS S44300) products conforming to ASTM A268 standards, featuring a unique chromium (19-21%) and copper (0.9-1.25%) alloy composition for enhanced corrosion resistance approaching 304-grade performance. This innovative ferritic grade offers superior resistance to pitting and crevice corrosion in chloride environments compared to conventional ferritic stainless steels, along with excellent formability and weldability characteristics. The alloy's copper addition improves its corrosion resistance in acidic and marine atmospheres, making it particularly suitable for heat exchangers, water heater tanks, and coastal architectural applications where both cost efficiency and durability are required. With its nickel-free composition, 443 provides a more economical alternative to austenitic grades while maintaining better thermal conductivity and lower thermal expansion for applications involving thermal cycling, though with reduced toughness at cryogenic temperatures characteristic of ferritic microstructures.