UNS N08020/EN 2.4660/Alloy 20/20Cb-3 Stainless Steel

Nickel Alloy 20 Bar, Alloy 20 Sheet

Alloy 20 (UNS N08020) is a high-nickel deformable austenitic stainless steel with high corrosion resistance to H2SO4 and HNO3 and their mixed acids. Alloy 20 offers excellent corrosion resistance and has been widely used in the chemical processing industry. Alloy 20 is an austenitic nickel-iron-chromium-based alloy with additions of copper and molybdenum. Its nickel content aids in its chloride ion stress and corrosion resistance. The addition of copper and molybdenum provides resistance to hostile environments, pitting, and crevice corrosion.

LKALLOY is an industry-leading China supplier of high-quality Nickel-based stainless steel alloys and we mainly stock and produces Alloy 20 plate, Alloy 200 pipe, Alloy 200 bars, and other forms for sale in various size and specifications.

Alloy 20 equivalent grades:

American: INCOLOY 020, Alloy 20, NO8020

Chinese: NS1403,NS143,20NB,0cr20ni35Mo3Cu3Nb

German: 2.4660,Nicr20cumo, Nicrofer3620NB

Available Forms and Specifications:

Alloy 20 Tube and pipe: ASTM B464 B468, ASTM B729;

Alloy 20 Sheet and Plate: ASTM B463

Alloy 20 Steel Bar: ASTM B473

Alloy 20 Forging:   ASTM B462

Alloy 20 Fitting:   ASTM B366

Chemical composition:

C Si Mn Ni Cr Mo Fe Cu Nb
≤0.06 ≤0.80 ≤1.0 36~38 19~20 2.0~3.0 36~38 3.0~4.0 0.5~0.7

Mechanical Properties:

Density, g/cm³ 8.1
Melting range, °C 1350 – 1370
Tensile strength, min, Mpa 550
Yield strength, 0.2% offset, min, Mpa 240
Elongation, %, min 30
Hardness, HB 235-220


Nickel Alloy 20 was originally designed for the sulfuric acid industry, now it has been widely used in petrochemical equipment, synthetic rubber manufacturing equipment, drugs, plastics, organic and heavy chemical processing, storage tank, piping, heat exchanger, pumps, valves, and other processing equipment, such as pickling equipment, chemical process piping, food, and Mixing tanks.

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