ASTM B164 is a specification for UNS N04400 (Nickel 400) and N04405 (Nickel 405) Nickel-Copper Alloy Rod, Bar, and Wire
Alloy / Nickel / Monel 400 (UNS N04400) is a nickel-copper alloy with high strength (comparable to structural steel) and toughness. Alloy 400 also has excellent corrosion resistance in a range of media including seawater, hydrofluoric acid, sulphuric acid and alkalis. Used for marine engineering, chemical, hydrocarbon processing equipment, and heat exchangers.
MONEL R-405 (UNS N04405) is the free-machining grade of Monel 400. Its greater sulfur content enhances machinability. It has essentially the same corrosion resistance and physical properties as alloy 400, but a slightly different range of mechanical properties. Nickel R-405 is used chiefly for automatic screw-machine stock and is not generally recommended for other applications.
