Alloy Steel 20 (also known as Alloy 20 / UNS N08020) is a high-performance corrosion-resistant alloy containing nickel, chromium, iron, copper, and molybdenum. It is specifically designed to provide exceptional resistance to sulfuric acid and other aggressive chemical environments, along with good resistance to pitting, crevice corrosion, and stress corrosion cracking.
Alloy Steel 20 offers excellent fabricability, weldability, and stable mechanical properties across a wide range of operating conditions. It is widely used in chemical processing plants, petrochemical industries, pharmaceutical equipment, heat exchangers, and storage tanks where corrosion resistance and long service life are critical for safe and efficient operation.
Use Alloy Steel 20 Round Bars when: excellent resistance to sulfuric acid, chlorides, and aggressive chemical environments is required along with good mechanical strength and long-term corrosion reliability. Alloy Steel 20 (UNS N08020) is a nickel–chromium–molybdenum alloy specifically engineered for chemical processing and corrosive service conditions.
→ Example: chemical processing equipment, acid handling systems, heat exchangers, reactors, storage tanks, and piping exposed to corrosive media.
Bright Finished / Machined Alloy Steel 20 Round Bars when: precise dimensional accuracy, smooth surface finish, and superior machinability are required for corrosion-critical components. Bright bars ensure uniform structure, tight tolerances, and consistent performance in demanding chemical environments.
→ Example: pump shafts, valve stems, fasteners, bolts, flanges, agitator shafts, and precision-machined chemical equipment parts.
Applications of Alloy Steel 20 Round Bars
Alloy Steel 20 round bars are widely used in industries where corrosion resistance and chemical stability are critical.
Chemical Processing Industry: Reactors, piping systems, storage tanks.
Petrochemical Industry: Heat exchangers, valves, acid service components.
Pharmaceutical & Food Processing: Hygienic and corrosion-resistant equipment.
When to Choose Alloy Steel 20 Round Bars?
Selection depends on corrosion severity, chemical exposure, temperature conditions, and the need for long-term reliability in aggressive environments.
Choose Alloy Steel 20 Round Bars when:
Severe sulfuric acid or chloride exposure is present
Excellent resistance to pitting and crevice corrosion is required
Stress corrosion cracking resistance is critical
Good mechanical strength with corrosion resistance is needed
Long service life in chemical environments is essential
Used in acid handling and chemical processing systems
