Alloy 20 Nickel–Chromium–Molybdenum Stainless Steel alloy
Description
Alloy 20 is a nickel–chromium–molybdenum stainless steel alloy developed for applications involving sulfuric acid. Its corrosion resistance also finds other uses in the chemical, food, pharmaceutical, power generation, and plastics industries. Alloy 20 resists pitting and chloride ion corrosion and its copper content protects it from sulfuric acid. Alloy 20 is not a stainless steel but a nickel alloy. Alloy 20 is often chosen to solve stress corrosion cracking problems, which may occur with 316L stainless.
It is also known as Carpenter 20, Allvac, Nickelvac 23, Special Metals Incoly Alloy 20, Cast versions are designated CN7M.
Applications
Sulfuric acid pickling tanks, racks and heating coils,,Phosphate coating drums and racks, Heat exchangers, Bubble caps, Process piping, Mixing tanks, Chemical and petroleum process equipment
Specifications
UNS# N08020 and N08007
A-351 (CN7M) CASTINGS, AUSTENITIC, AUSTENITIC-FERRITIC (DUPLEX), FOR PRESSURE-CONTAINING PARTS
B-358 COPPER-NICKEL ADDITION ALLOY
B-366 FACTORY-MADE WROUGHT NICKEL & NICKEL ALLOY WELDING FITTINGS
B-462 FORTGED OR ROLLED ALLOY PIPE FLANGES, FORGED FITTINGS & VALVES & PARTS FOR CORROSIVE HIGH-TEMPERATURE SERVICE
B-463 ALLOY PLATE SHEET & STRIP
B-464 WELDED ALLOY PIPE
B-468 WELDED ALLOY TUBES
B-471 NICKEL ALLOY SPRING WIRE
B-472 NICKEL ALLOY BILLETS & BARS FOR REFORGING
B-473 NICKEL ALLOY BAR & WIRE
B-474 ELECTRIC FUSION WELDED NICKEL ALLOY PIPE
B-475 NICKEL ALLOY ROUND WEAVING WIRE
B-729 SEAMLESS NICKEL-ALLOY PIPE & TUBE
B-751 GENERAL REQUIREMENTS FOR NICKEL & NICKEL ALLOY WELDED TUBES
J470 WROUGHT NICKEL & NICKEL-RELATED ALLOYS
Available Forms
- Fittings & Flanges
- Forge
- Pipe
- Plate
- Sheet
- Strip
- Tubes
- Wire
- Valves