Tough Alloys

Technical Data SheetCobalt 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 LimitsWeight %CMnSiPSCrNiCoMoWFeCobalt Alloy 6b0.90-1.400.50-2.000.20-2.000.04 max0.03 max28.00-32.003.00 maxbal1.50 max3.50-5.503.0 max
Typical Mechanical Properties (minimums)MaterialFormTensile Strength ksiYield Strength ksiElongation in 4DReduction of Area (*)Hardness (HRC)Alloy 6bBar (AMS 5894)130705733-43Alloy 6bSheet / Plate (AMS 5894)130705733-43Properties 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
AvailabilityCobalt 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
SpecificationsAMS 5894 - bar, sheet and plateUNS R30016

Additional Information:

• Production Capacity: 10000
• Delivery Time: Ready stock
• Packaging Details: Export Packaging

Stellite® cobalt base alloys consist of complex carbides in an alloy matrix. They are resistant to wear, galling and corrosion and retain these properties at high temperatures. Their exceptional wear resistance is due mainly to the unique inherent characteristics of the hard carbide phase dispersed in a CoCr alloy matrix. Description This tungsten strengthened cobalt-chromium alloy is the cast version of the wrought alloy L605. A special low carbon material has been found to have exceptional thermal fatigue resistance and is useful for tools to work hot steel. The alloy also resists hot metal on metal wear. Corrosion Resistance Stellite® alloy 25 is resistant to oxidation and carburization up to 1900°F. The alloy resists wet chlorine at ambient temperatures and is resistant to nitric and hydrochloric acids under certain conditions. Exposure testing is recommended to verify performance. Wear Stellite® alloy 25 forms a protective oxide film during hot metal-on-metal wear which prevents metal transfer and damage due to adhesion. The alloy is resistant to thermal cracking and surface fatigue. Since the micro- structure is relatively free of carbide reinforcement, it is not recommended for low stress or low angle particle erosion service. Finishing Carbide tools allow a variety of conventional machining operations. Use positive rake angle to avoid burnishing since the alloy work hardens readily. Sharp tools and coolant are recommended for drilling. Co Cr W C Others Hardness Density Melting Range Base 20 15 0.1 Ni, Fe, Si, Mo, Mn 20-45 HRC 8.31 g/cm3 0.300 lb/in3 2425-2573°F 1329-1410°C STELLITE ® 25 ALLOY Nominal Composition (mass %) and Physical Properties TECHNICAL DATA Nominal Thermal Expansion Coefficient (from 20°C/68°F to stated temperature) 100°C (212°F) 200°C (392°F) 300°C (572°F) 400°C (752°F) 500°C (932°F) 600°C (1112°F) 700°C (1292°F) 800°C (1472°F) 900°C (1652°F) 1000°C (1832°F) µ-inch/inch.°F - 6.8 - 7.2 - 7.6 - 7.8 - 8.0 Nominal Tensile Properties at Room Temperature Ultimate Tensile Strength Rm Yield Stress Rp(0.2%) Elongation Elastic Modulus ksi MPa ksi MPa A(%) ksi GPa Castings 134 925 130 895 5 30,000 207 Nominal Hot Hardness (Brinell Hardness Number) as-cast 20°C (68°F) 100°C (212°F) 200°C (392°F) 300°C (572°F) 400°C (752°F) 500°C (932°F) 600°C (1112°F) 700°C (1292°F) 800°C (1472°F) 900°C (1652°F) 350 - - - - 280 - - - 130 Thermal and Electrical Properties Approximate value at Room Temperature Thermal conductivity 65 Btu-in/hr/ft2 /°F Electrical resistivity 34.9 µ-ohm.inch Applications Metal working tools where a combination of metal-on-metal wear, thermal fatigue and hot corrosion resistanceare required, such as piercing points, forming tools, and extrusion dies. Also used for furnace hardware. Available forms Castings, welding consumabl

Additional Information:

• Production Capacity: 10000
• Delivery Time: Ready Stock
• Packaging Details: Export Packaging

Stellite® cobalt base alloys consist of complex carbides in an alloy matrix. They are resistant to wear, galling and corrosion and retain these properties at high temperatures. Their exceptional wear resistance is due mainly to the unique inherent characteristics of the hard carbide phase dispersed in a CoCr alloy matrix. Description This tungsten strengthened cobalt-chromium alloy is the cast version of the wrought alloy L605. A special low carbon material has been found to have exceptional thermal fatigue resistance and is useful for tools to work hot steel. The alloy also resists hot metal on metal wear. Corrosion Resistance Stellite® alloy 25 is resistant to oxidation and carburization up to 1900°F. The alloy resists wet chlorine at ambient temperatures and is resistant to nitric and hydrochloric acids under certain conditions. Exposure testing is recommended to verify performance. Wear Stellite® alloy 25 forms a protective oxide film during hot metal-on-metal wear which prevents metal transfer and damage due to adhesion. The alloy is resistant to thermal cracking and surface fatigue. Since the micro- structure is relatively free of carbide reinforcement, it is not recommended for low stress or low angle particle erosion service. Finishing Carbide tools allow a variety of conventional machining operations. Use positive rake angle to avoid burnishing since the alloy work hardens readily. Sharp tools and coolant are recommended for drilling. Co Cr W C Others Hardness Density Melting Range Base 20 15 0.1 Ni, Fe, Si, Mo, Mn 20-45 HRC 8.31 g/cm3 0.300 lb/in3 2425-2573°F 1329-1410°C STELLITE ® 25 ALLOY Nominal Composition (mass %) and Physical Properties TECHNICAL DATA Nominal Thermal Expansion Coefficient (from 20°C/68°F to stated temperature) 100°C (212°F) 200°C (392°F) 300°C (572°F) 400°C (752°F) 500°C (932°F) 600°C (1112°F) 700°C (1292°F) 800°C (1472°F) 900°C (1652°F) 1000°C (1832°F) µ-inch/inch.°F - 6.8 - 7.2 - 7.6 - 7.8 - 8.0 Nominal Tensile Properties at Room Temperature Ultimate Tensile Strength Rm Yield Stress Rp(0.2%) Elongation Elastic Modulus ksi MPa ksi MPa A(%) ksi GPa Castings 134 925 130 895 5 30,000 207 Nominal Hot Hardness (Brinell Hardness Number) as-cast 20°C (68°F) 100°C (212°F) 200°C (392°F) 300°C (572°F) 400°C (752°F) 500°C (932°F) 600°C (1112°F) 700°C (1292°F) 800°C (1472°F) 900°C (1652°F) 350 - - - - 280 - - - 130 Thermal and Electrical Properties Approximate value at Room Temperature Thermal conductivity 65 Btu-in/hr/ft2 /°F Electrical resistivity 34.9 µ-ohm.inch Applications Metal working tools where a combination of metal-on-metal wear, thermal fatigue and hot corrosion resistanceare required, such as piercing points, forming tools, and extrusion dies. Also used for furnace hardware. Available forms Castings, welding consumabl

Additional Information:

• Production Capacity: 10000
• Delivery Time: Ready Delivery
• Packaging Details: Export Packaging

Technical Data SheetCobalt 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 LimitsWeight %CMnSiPSCrNiCoMoWFeCobalt Alloy 6b0.90-1.400.50-2.000.20-2.000.04 max0.03 max28.00-32.003.00 maxbal1.50 max3.50-5.503.0 max
Typical Mechanical Properties (minimums)MaterialFormTensile Strength ksiYield Strength ksiElongation in 4DReduction of Area (*)Hardness (HRC)Alloy 6bBar (AMS 5894)130705733-43Alloy 6bSheet / Plate (AMS 5894)130705733-43Properties 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
AvailabilityCobalt 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).

Additional Information:

• Production Capacity: 10000
• Delivery Time: Ready Stock
• Packaging Details: Export Packaging