Alloy 20, sometimes referred to as Carpenter 20, is a nickel-iron-chromium alloy enriched with copper and molybdenum. Designed originally for sulfuric acid service, it has evolved into one of the most trusted materials in the chemical industry. Unlike many high-nickel alloys that emphasize high-temperature resistance, Alloy 20 stands out primarily for its ability to handle corrosive environments involving strong acids.

Factories that produce fertilizers, pharmaceuticals, and plastics rely heavily on Alloy 20 rods. These rods are fabricated into reactor linings, mixing tanks, and piping systems that frequently encounter sulfuric, phosphoric, and nitric acids. While stainless steels might fail quickly under such conditions, Alloy 20 demonstrates an ability to resist both uniform corrosion and localized attacks like pitting.

Another key advantage is its balance between cost and performance. Pure nickel alloys are often prohibitively expensive for large-scale systems, whereas Alloy 20 provides a more economical alternative without sacrificing durability. It delivers sufficient nickel content for corrosion protection while integrating iron and copper for toughness and cost efficiency.

Beyond the chemical sector, Alloy 20 has been adopted by food processing plants and pharmaceutical facilities where hygiene and resistance to cleaning chemicals are essential. Rods from this alloy are fabricated into fasteners, shafts, and fittings that must not contaminate the products they contact.

In essence, Alloy 20 demonstrates how a carefully balanced composition can meet the dual challenges of corrosive environments and affordability. Its widespread use in sulfuric acid service stands as proof of its reliability, while its versatility continues to open doors in adjacent industries.