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Carpenter 20, UNS N08020

Alloy 20 was developed by Carpenter Technology as an upgrade to 316 Stainless. It is classified as a super-austenitic due to iron being its most abundant component. The UNS system classifies it as nickel-based alloy even though its nickel content is less than half. Alloy 20 resists hot sulfuric acid. It is often found in chemical mixers and fertilizer manufacturing equipment. Generally, it is an economical alternative to Alloy C276 and other higher nickel content materials.


  • Lock Nuts
  • Set Screws
  • Dowel Pins
  • Pipe Plugs
  • Vented Screws
  • 12-Pt Flange Screws
  • Custom Fasteners


  • Plate &Sheet: ASTM B463, ASME SB463
  • Bar: ASTM B473, ASME SB473
  • Seamless Pipe & Tube: ASTM B729, ASME SB729

Material Properties


Technical Data Sheet

Industries & Applications

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