High-performance Nitronic 60 UNS S21800/Alloy 218 stainless steel

Overview

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 performs well at high temperature around 1800ºF. The additions of silicon and manganese assist to inhibit wear, galling and fretting even in the annealed condition. Through cold working Nitronic 60, it is possible to attain higher strengths, however it does not enhance the anti-galling properties. The oxidation resistance of Nitronic 60 is similar to Alloy 309 and far superior to Alloy 304.

Nitronic 60 is a Nitrogen-strengthened stainless steel that provides a significantly lower cost way to fight wear and galling when compared with alloys high in Cobalt or Nickel which are often used in bearings. Its uniform corrosion resistance is better than Type 304 in most media. Its chloride pitting resistance is superior to Type 316. Room temperature yield strength is nearly twice that of Types 304 and 316. In addition, N60 stainless steel provides excellent high-temperature oxidation resistance and low-temperature impact resistance.

Limiting Chemical Composition, %

Iron.......................................................................................................................................................................................59.58-64.74

Nickel.......................................................................................................................................................................................8.00-8.50

Chromium................................................................................................................................................................................16.0-17.0

Manganese..............................................................................................................................................................................7.50-8.50

Carbon......................................................................................................................................................................................0.06-0.08

Silicon.......................................................................................................................................................................................3.70-4.20

Sulphur.....................................................................................................................................................................................0.03 max.

Phosphorus.............................................................................................................................................................................0.04 max.

Molybdenum............................................................................................................................................................................0.75 max.

Niobium....................................................................................................................................................................................0.10 max.

Vanadium.................................................................................................................................................................................0.20 max.

Copper......................................................................................................................................................................................0.75 max.

Thallium...................................................................................................................................................................................0.05 max.

Aluminium...............................................................................................................................................................................0.02 max.

Boron...................................................................................................................................................................................0.0015 max.

Tin.............................................................................................................................................................................................0.05 max.

Tungsten...................................................................................................................................................................................0.15 max.

Physical properties (Annealed )

Mechanical Properties

Corrosion resistance

The general corrosion resistance of N60 stainless steel falls between that of Types 304 and 316. However, experience shows that in a wear system, a galling or seizing failure occurs first. Followed by dimensional loss due to wear and finally corrosion. Galling and wear must be the first concerns of the design engineer. Although the general corrosion resistance of N60 is not quite as good as Type 316, it does offer better chloride pitting resistance, stress corrosion cracking resistance, and crevice corrosion resistance. Corrosion tests are not normally performed on N60 HS.

Heat treatment

Nitronic 60 is fully austenitic and can not be strengthened by heat treatment. Solution annealing is carried out at 1060°C, followed by water quenching.

Available Forms

We provide you with a variety of product forms, including but not limited to

● Bar & Rod

● Pipe & Tube

● Coil & Strip

● Plate & Sheet & Circle

● Wire & Welding

● Fitting (Flange, Elbow, Tee...)

● Customize