HPA Alloy Cobalt 6BH - UNS R30016
Alloy 6BH, UNS R30016, is commonly associated with AMS 5894.
Alloy 6BH is commonly known as high strength 6B and our HPA 6BH. Alloy 6BH is a Cobalt-Chrome-Tungsten alloy age hardened for enhanced hardness and wear resistance.
Mechanical properties here.
Chemistry
| C | Cr | Fe | Mo | Mn | Ni | W | |
|---|---|---|---|---|---|---|---|
| Max | 1.40% | 32% | 3% | 1.5% | 2% | 3% | 3.5% |
| Min | 0.90% | 28% | 5.5% |
Typical Inventory
Product Description
This alloy surpasses standard Cobalt 6B with better ductility yet the same good hardness. Cobalt 6BH 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 6BH 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.
General Data
- Solution Annealed 2250 °F, Air Cooled
- Density 0.303 lb/in3
- Specific Heat (@ 72 °F) 0.101 Btu/lb-°F
-
Thermal Conductivity (32 to 212 F)
103 Btu-in./sq. ft.-hr.-°F
-
Electrical Resistivity (68 °F)
546 Ohms/ cir mil ft
- Melting Range 2310 to 2470 °F
- Electrical Conductivity compared to Copper 1.90%
- Reflecting Power 57 - 70%
-
Mean Coefficient of Thermal Expansion
32-212°F 7.7 microinches/in.°F32-932°F 8.3 microinches/in.°F32-1472°F 9.1 microinches/in.°F32-1832°F 9.7 microinches/in.°F
Applications
Applications for alloy 6BH include tile making machines, rock crushing rollers, and cement and steel mill equipment. Alloy 6BH is well suited for valve parts, pump plungers, shafting, and sleeves.
Food preparation machinery that cuts, chops, slices, dices, and shreds can use Cobalt 6BH for its wear life and minimal metal losses. The F.D.A. has issued approval for food contact due to its minimal metal loss and government approval of cobalt containing equipment.
Cobalt 6BH is also used in non-food applications such as tire cord cutting, carpet cutting, trimming knives for ceramics, leather knives, surgical blades, and Kevlar. Other applications include saw blade tips, scrapper blades, chippers, shredders, and other cutting edges.
Wrought alloy 6BH offers the fatigue resistance and toughness of a hot worked microstructure with the heat corrosion and wear resistance of cobalt based alloy. High Performance Alloys, Inc. inventories sheet, and plate. Bar can be produced 1/2" through 2-1/2" diameter.
Other applications are steam turbine erosion shields, chain saw guide bars, high temperature bearings, valve stems, food processing equipment, needle valves, centrifuge liners, hot extrusion dies, forming dies, nozzles, extruder screws, and many other miscellaneous wear surfaces.
Mechanical Properties
The typical properties listed can usually be provided in rounds, sheet, strip, plate, & custom forgings. We have the equipment to produce small quantities in special sizes to meet our customers’ specific needs.
| Ultimate Tensile (ksi) | Yield Strength (ksi) | Elong. % | Hardness (Rockwell C) |
|---|---|---|---|
| 195 | 121 | 4.5 | 42 - 49 |
Common Specifications
Please, note that the specs listed are for reference and are not comprehensive nor indicative of the actual specifications listed on the Material Test Report (MTR). If you have a special spec requirement, then please reach out to our sales department at 1-800-472-5569.
| Bar | Sheet | Plate |
|---|---|---|
| AMS 5894 | AMS 5894 | AMS 5894 |
We can cold work high strength into your material to meet your high-performing requirements. We also facilitate size conversions, hot and cold rolling, and heat treating materials, as well as our machining capabilities.
For more information, contact us (or call 1-800-945-8230) and request our GFM Bulletin; you can view our brochure online! There's also more information about our offered services on our production capabilities page.
We have expanded our abilities to work smaller diameter bar down to nominal wire. Also, check out our weld wire to finish the job right!
Machining
Alloy 6BH 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 6BH but threads can be produced by EDM techniques. For a better surface finish, this alloy should be ground.
6BH is ground to obtain close tolerances with excellent finish properties. Do not quench dry ground material as it may cause surface imperfections.
Data Sheet
Data referring to mechanical properties and chemical analyses are the result of tests performed on specimens obtained from specific locations of the products in accordance with prescribed sampling procedures; any warranty thereof is limited to the values obtained at such locations and by such procedures. There is no warranty with respect to values of the materials at other locations.