Wear Resistant (Co-Cr-W)
Chemistry of AMS 5894. This material surpasses 6K with better ductility, with the same good hardness.
HPA COBALT alloy 6B H is the same composition of Cobalt 6B, except the material is hot rolled and then age hardened. The direct age-hardening after hot rolling provides the maximum hardness and wear resistance. The advantages this creates are increased wear life, retained edge characteristics, and increased hardness. These properties are in addition to the galling and seizing resistance of the regular Cobalt 6B.
Cobalt 6B H is known in the industry as a metal that retains its cutting edge. The economic advantages are in its long wear time, less down time, and fewer replacements.
NITRONIC 50 Stainless Steel provides a combination of corrosion resistance and strength not found in any other commercial material available in its price range. This austenitic stainless has corrosion resistance greater than that provided by Types 316 and 316L, plus approximately twice the yield strength at room temperature. In addition, Armco NITRONIC 50 Stainless has very good mechanical properties at both elevated and sub-zero temperatures. And unlike many austenitic stainless steels, NITRONIC 50 does not become magnetic when cold worked.
High Performance Alloys can make hot rolled, cold worked, & strain hardened High Performance Stainless Steel (HPSS) bars in house. Ask for our GFM Bulletin for more information about our bar processing capabilities. We have expanded to enhance product availability.
Wear Resistant (Co-Cr-W)
Cobalt 6B is a cobalt based chromium, tungsten alloy for wear environments where seizing, galling and abrasion are present. 6B is resistant to seizing and galling and with its low coefficient of friction, allows sliding contact with other metals without damage by metal pick up in many cases. Seizing and galling can be minimized in applications without lubrication or where lubrication is impractical. Metal seizing is similar to one metal piece building heat against another and they become "welded" together. Galling is when these "weld" areas break off and form an abrasive debris which creates additional abrasion problems.
Alloy 6B has outstanding resistance to most types of wear. Its wear resistance is inherent and not the result of cold working, heat treating or any other method. This inherent property reduces the amount of heat treating and post machining. 6B has outstanding resistance to cavitation erosion. Steam turbine erosion shields from 6B have protected the blades of turbines for years of continuous service. 6B has good impact and thermal shock resistance resists heat and oxidation, retains high hardness even at red heat (then cooled, recovers full original hardness) and has resistance to a variety of corrosive media. 6B is useful where both wear and corrosion resistance are needed.
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 Type 309 S.S., and far superior to Type 304S.S. 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.
Several data sheets are available on the wear compatibility of this alloy with dissimilar couples, as well as self-mated coupled results.
If your galling problem occurs at less than 1500ºF, then you should think about switching to this alloy. Nitronic 60 has a better cost advantage than any other alloy available. Other materials require an additional amount of heat treating to raise their hardness, where NITRONIC 60 is excellent in the annealed condition.
|High Performance Alloys, Inc.||High Performance Alloys, Inc.||High Performance Alloys, Inc.||High Performance Alloys, Inc.|
|Product Category||Metal Shapes and Stock||Metal Shapes and Stock||Metal Shapes and Stock||Metal Shapes and Stock|
|Product Name||HPA Cobalt 6B H||Nitronic® 50 / HPA N50||HPA Cobalt 6B||Nitronic® 60 / HPA N60|
|Type||Cobalt; Alloy; Miscellaneous Nonferrous Metal or Alloy||Stainless; Alloy||Cobalt; Alloy; Miscellaneous Nonferrous Metal or Alloy||Stainless; Alloy|
|Shape / Form||Ingot or Billet; Profile or Structural Shape; Semi-finished, Mill Stock or Near Net Shapes||Ingot or Billet; Profile or Structural Shape; Semi-finished, Mill Stock or Near Net Shapes||Ingot or Billet; Profile or Structural Shape; Semi-finished, Mill Stock or Near Net Shapes||Ingot or Billet; Profile or Structural Shape; Semi-finished, Mill Stock or Near Net Shapes|
|Features||Superalloy; Wear Resistant||Austenitic; Corrosion Resistant; Superalloy||Superalloy; Wear Resistant||Austenitic; Corrosion Resistant; Heat Resistant; Superalloy; Wear Resistant|
|Processing, Temper & Finish||Wrought; Forged||Wrought; Forged; Annealed||Wrought; Forged||Wrought; Ground / Machined; Forged; Annealed|