Co 60, Cr 30, W 4.50, C 1.15, Si 1.1
High Performance Alloys stocks and produces HPAlloys COBALT alloy 6BCR in this grade in the following forms: Bar, flat bar, sheet, and plate. Request quote on this grade.
Wear Resistant (Co-Cr-W)
Chemistry of AMS 5894. This material surpasses 6K with better hardness.
HPAlloys COBALT alloy 6BCR is the same composition of Cobalt 6B, except the material is hot rolled, annealed and then work hardened or Cold Reduced to impart higher strength. After machining, the material can then be age-hardened for 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 6BCR 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.
Steam turbine erosion shields, Chain saw guide bars, High temperature bearings, Furnace fan blades, Valve stems, Food processing equipment, Needle valves, Centrifuge liners, Hot extrusion dies, Forming dies, Nozzles, Extruder screws, & many other Misc. wear surfaces.
Applications for alloy 6BCR also include tile making machines, rock crushing rollers and cement and steel mill equipment. Alloy 6BCR is well suited for valve parts, pump plungers
Wrought alloy 6BCR offers the fatigue resistance and toughness of a cold worked microstructure, with the heat corrosion and wear resistance of cobalt based alloy. High Performance Alloys, Inc. inventories sheet, and plate. Bar is can be produced 1/2" through 2-1/2" diameter. Bar can be supplied in random lengths or cut to order. Sheet and plate are offered as whole plates, can be abrasive cut, or processed further using waterjet services.
Wear resistance data.
6BCR Chemical Requirements |
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|
Ni |
Cr |
Mo |
Mn |
C |
Si |
Fe |
Max |
3.0 |
32.00 |
1.50 |
2.0 |
1.40 |
2.0 |
3.0 |
Min |
28.00 |
0.5 |
0.90 |
0.2 |
6BCR Mechanical Property Requirements [TBA] |
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Ultimate Tensile |
Yield Strength (0.2% OS) |
Elong. |
R/A |
Hardness |
|
Min |
TBA |
TBA |
Rc 50 AIM / TBA |
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Max |
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Min |
|
|
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Max |
UNS R30016 |
|
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Bar |
AMS 5894 Chemistry |
Sheet |
AMS 5894 Chemistry |
Plate |
AMS 5894 Chemistry |
Forging |
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Alloy 6BCR is generally machined with tungsten-carbide tooling, and will produce a finish of about 200-300 RMS. Carbide inserts are used with a 5-degree (0.9 rad.) negative tool holder and a 30-degree (0.52 rad.) or 45-degree (0.79 rad.) lead angle. Tools for facing or boring are essentially the same except for greater clearances where needed. For best results in drilling, the drill web should be kept thin. Screw machine length, carbide tipped drills should be used. In reaming, a 45-degree (0.79 rad.) cutting lead angle should be used. High speed taps are not recommended for Alloy 6BCR but threads can be produced by EDM techniques. For better surface finish, HPAlloys COBALT 6BCR should be ground.
6BCR is ground to obtain close tolerances with excellent finish properties. Do not quench dry ground material, as may cause surface imperfections.
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