Alloy 316/316L

Quick Facts

Alloy 316 and or 316L [UNS S31600/S31603] is a chromium-nickel-molybdenum austenitic stainless steel, developed to provide improved corrosion restance to Alloy 304/304L in moderately corrosive environments. It is often used in processes which containing chlorides and/ or halides. It also provides higher creep, stress-torupter and tensile strength at elevated temperatures. It is common practice to be dual certified as 316/316L. Reason, low carbon of 316L combined with an addition of nitrogen enables 316L to meet mechanical properties of 316. It is an non-magnetic Alloy in annealed condition, but can be slightly magnetic as a result ofcold working or welding

Typical Applications

  • Chemical and Petrochemical processing, vessel, tanks, heat exchanger, piping systems, valves and pumps
  • Food and Beverage processing
  • Marine
  • Medical
  • Pharmaceutical processing
  • Water treatment
  • Testiles
  • Power generation and Nuclear

Stock Range

We stock a comprehensive range of round bars, sizes between 14mm and 280mmmm in diameter Flat Bars with a thickness between 18mm – 84mm and a width max. of 250mm.
We are offering as well:
General forgings
Rings
Blocks
Primarily manufactured in: Europe, US
Primarily manufactured in: Europe, US

Industry Specifications

  • ASTM A240
  • ASME SA 240
  • AMS 5524/5507
  • QQ-S-766

Material may also be supplied against Customer specifications, subject to enquiry.

Melting Practices

  • VIM/ESR or VAR
  • Triple melted

Chemical Analysis

Chemical Composition, % 316

Chemical Composition, % 316L

Mechanical Properties

Machinability

Alloy 316/316L is subject to work hardening during deformation and is subject to chip breaking. The best machining results are achieved with slower speed, heavier feeds, excellent lubrication, sharp tooling and
powerful rigid equipment.

Corrosion Resistance

In most applications Alloy 316/316L has superior corrosion resistance to Alloy 304/304L. Alloy 316/316L performes well in sulfur containing e.g. in pulp and paper industry. One exception is in highly oxidizing acids
such as nitricacid.
Alloy 316/316L also has good resistance to pitting in phosphoric and acetic acid. It performs well in boiling 20% phosphoric acid. The alloy can also be used in the food and pharmaceutical process industries where it is utilized to handle hot organic and fatty acids in an effort to minimize product contamination.
Alloy 316/316L performs well in fresh water service even with high levels of chlorides. The alloy has excellent resistance to corrosion in marine environments under atmospheric conditions.
The higher molybdenum content of Alloy 316/316L assures it will have superior pitting resistance to Alloy 304/304L in applications involving chloride solutions, particularly in an oxidizing environment.
In most instances, the corrosion resistance of Alloys 316 and 316L will be roughly equal in most corrosive environments. However, in environments that are sufficiently corrosive to cause intergranular corrosion of welds and heat-affected zones Alloy 316L should be used because of its low carbon content.

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