Nitronic 60

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Description

NITRONIC 60 , ALLOY 218, UNS S21800

What is N60 stainless steel?

Nitronic 60 is truly an all purpose metal. This fully austenitic alloy was originally designed as a temperature alloy, and subsequently has good high temperature properties for temperatures around 1800ºF. The oxidation resistance of Nitronic 60 is similar to stainless steel 309SS., and far superior to stainless steel 304SS. This grade is best known for its wear and galling resistance.

The additions of Silicon and Manganese have given this alloy a matrix to inhibit wear, galling, and fretting even in the annealed condition. Higher strengths are attainable through cold working the material and is still fully austenitic after severe cold-working. This working does not enhance the anti-galling properties as is normal for carbon steels and some stainless steels. The benefit to the cold or hot work put into the material is added strength and hardness, and the wear resistance does not decrease noticeably. Chromium and Nickel additions give it comparable corrosion to 304 and 316 stainless steels, while having approximately twice the yield strength. The high mechanical strength in annealed parts permits use of reduced cross sections for weight, and cost reductions through the use of thinner stock.

Nitronic 60 is a high Silicon, high Manganese, Nitrogen strengthened austenitic stainless alloy. Nitronic 60 is an all purpose metal that was originally designed as a temperature alloy and therefore has good high temperature properties for temperatures around 1800ºF.  Nitronic 60 is used in the Aerospace , Food and Drug, Oil Field, Petrochemical, Surgical and Chemical Processing Industries.

 

Nitronic 60 Chemical Composition 
Weight % Ni Cr Mn Si N Mo C
Nitronic 60
8-9 16-18 7-9 3.5-4.5 0.08-0.018 0.75 max 0.10 max

 

UNS s21800 Applications

  • Automotive valves – can withstand gas temperatures of upto 1500°F for a minimum of 50,000 miles.
  • Fastener galling – capable of frequent assembly and disassembly, allowing more use of the fastener before the threads are torn up, also helps to eliminate corroded or frozen fasteners.
  • Pins – Used in roller prosthetics & chains to ensure a better fit of parts (closer tolerance, non-lubricated) and longer lasting.
  • Marine shafts – better corrosion than types 304 and 316, with double the yield strength.
  • Pin and hanger expansion joints for bridges – better corrosion, galling-resistance, low temperature toughness, & high charpy values at sub-zero temps compared to the A36 and A588 carbon steels commonly used.

 

 

UNS S21800 Mechanical Property Requirements Under 0.5″
Ultimate Tensile Yield Strength (0.2% OS) Elong. in 4D R/A Hardness
Min 105 KSi 55 KSi 35% 55%
Max
Min 724 MPa 379 MPa
Max

 

UNS S21800 Mechanical Property Requirements Over 0.5″
Ultimate Tensile Yield Strength (0.2% OS) Elong. R/A Hardness
Min 95 KSi 50 KSi 35% 55%
Max
Min 655 MPa 345 MPa
Max

 

What is the difference between Nitronic 50 and 60?
Nitronic alloys provide outstanding corrosion resistance. Nitronic 50 is a corrosion-resistant metal with low magnetic permeability. … Generally considered an all-purpose metal, nitronic 60 is oxidation resistant and tolerates extreme wear and galling.
Does Nitronic 60 Rust?
The corrosion resistance of Armco NITRONIC 60 Stainless Steel falls between that of types 304 and 316. … Corrosion tests are not normally performed with NITRONIC 60 High Strength. Corrosion Resistance. Nitronic 60’s uniform corrosion resistance is better than 304 stainless in most environments.
Is Nitronic 60 heat treatable?
Electralloy Nitronic® 60 Stainless Steel was originally covered by U.S. Patent 3,912,503. Electralloy Nitronic® 60 Stainless Steel is not hardenable by heat treatment. Annealing at 1950° F (1066° C) followed by water quenching is recommended.