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Cobalt Alloy 6b / Stellite 6b (AMS 5894)
Technical Data Sheet
Cobalt alloy 6b / Stellite 6b is a cobalt-based, chromium-tungsten alloy used extensively in wear environments where its low friction coefficient minimises the risk of seizing and galling, even in applications where lubrication is not practical. Stellite 6b is supplied in the solution treated condition (to AMS 5894) and its wear resistant properties inherent in this state limit the amount of heat treating and post machining. Typical applications for Alloy 6b include chain saw guide blades, furnace fan blades, high temperature bearings, valve stems, food processing equipment and steel mill equipment.
| Chemical Composition Limits | |||||||||||
| Weight % | C | Mn | Si | P | S | Cr | Ni | Co | Mo | W | Fe |
| Cobalt Alloy 6b | 0.90-1.40 | 0.50-2.00 | 0.20-2.00 | 0.04 max | 0.03 max | 28.00-32.00 | 3.00 max | bal | 1.50 max | 3.50-5.50 | 3.0 max |
Typical Mechanical Properties (minimums)
| Material | Form | Tensile Strength ksi | Yield Strength ksi | Elongation in 4D | Reduction of Area (*) | Hardness (HRC) |
| Alloy 6b | Bar (AMS 5894) | 130 | 70 | 5 | 7 | 33-43 |
| Alloy 6b | Sheet / Plate (AMS 5894) | 130 | 70 | 5 | 7 | 33-43 |
| Properties shown are for sheet and plate up to 1.0" thick and for round bar up to 3.5" diameter. *Reduction in area is not applicable to sheet or plate under 0.5" thick | ||||||
Availability
Cobalt Alloy 6b / Stellite 6b is available in round bar, wire, sheet and plate. For all stock availability contact Sales.
NEW - Aircraft Materials now offers a comprehensive range of high-quality Alloy 6 metal powders, produced and tested to exacting standards for use in all processes including Additive Manufacturing (AM), Near-Net Shape Powder Metallurgy (NNS/PS) and Hot-Isostatic Pressing (HIP). Find out more email us with your quality Alloy 6 metal powder requirements: powders@aircraftmaterials.com
Specifications
AMS 5894 - bar, sheet and plate
UNS R30016
