416 (UNS S41600) Stainless Steel

416 (UNS S41600) Stainless Steel

416 (UNS S41600) Stainless Steel General Properties Alloy 416 is a martensitic, free-machining, chromium steel alloy that is generally considered to be the first free-machining stainless steel. It has the highest machinability of any stainless steel at about 85% of that of a free-machining...
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416 (UNS S41600) Stainless Steel

General Properties

Alloy 416 is a martensitic, free-machining, chromium steel alloy that is generally considered to be the first free-machining stainless steel. It has the highest machinability of any stainless steel at about 85% of that of a free-machining carbon steel. Martensitic stainless steels were designed to be hardenable by heat treatment and also corrosion resistant. 


Specifications: UNS S41600


Applications:

Alloy 416 is generally used for parts that are extensively machined and require the corrosion resistance of a 13% chromium stainless steel. Applications that generally use Alloy 416 include:

  • Electrical motors

  • Nuts and bolts

  • Pumps

  • Valves

  • Automatic screw machine parts

  • Washing machine components

  • Studs

  • Gears


Standards:

  • ASTM/ASME: UNS S41600

  • EURONORM: FeMi35Cr20Cu4Mo2

  • DIN: 2.4660


Corrosion Resistance:

  • Demonstrates corrosion resistance to natural food acids, waste products, basic and neutral salts, natural waters, and most atmospheric conditions

  • Less resistant that the austenitic grades of stainless steel and also the 17% chromium ferritic alloys

  • High sulfur, free-machining grades like Alloy 416 are unsuitable for marine or other chloride exposure

  • Maximum corrosion resistance is achieved in the hardened condition, with a smooth surface finish


Heat Resistance

  • Fair resistance to scaling in intermittent service up to 1400oF (760oC) and up to 1247oF (675oC) in continuous service

  • Not recommended for use in temperatures above the relevant tempering temperature if maintenance of mechanical properties is important


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