Overview
Cobalt-titanium alloy is a high-performance material blending the strength of cobalt with the corrosion resistance and biocompatibility of titanium. Primarily used in demanding industries like aerospace and medical technology, it offers a unique balance of durability and lightweight properties. This alloy is engineered to withstand extreme environments, making it ideal for components exposed to high stress, temperature fluctuations, or corrosive substances. Its versatility has led to adoption in specialized tools, surgical implants, and aerospace fasteners.
Physical and Chemical Properties
The alloy exhibits exceptional tensile strength (up to 1,200 MPa) and fatigue resistance, outperforming many steel grades. Its thermal stability allows operation at temperatures up to 600°C without significant degradation. Chemically, it forms a passive oxide layer that prevents further corrosion, similar to pure titanium. This makes it resistant to saltwater, acids, and industrial chemicals. The exact properties vary with the cobalt-to-titanium ratio, which can be customized for specific applications.
Main Applications
In aerospace, the alloy is used for turbine blades, landing gear components, and fasteners due to its strength-to-weight ratio. The medical field utilizes it for orthopedic implants and dental prosthetics, benefiting from its biocompatibility and MRI compatibility. Industrial applications include corrosion-resistant valves, cutting tools, and molds for plastic injection. Recent developments explore its use in 3D-printed components for customized medical devices and lightweight aerospace structures.
Safety and Storage
While inert in solid form, machining produces dust/fumes requiring ventilation and NIOSH-approved respirators. Alloy ingots should be stored in moisture-controlled environments to prevent surface oxidation. Medical-grade alloys must meet ISO 5832-12 or ASTM F2066 standards for implant safety. Industrial users should verify material certifications (e.g., RoHS compliance) for restricted substances like beryllium in some formulations.
B2B Procurement Guide
Specify required composition (e.g., Co-20Ti vs. Co-30Ti) and product form (powder, wire, or mill products). Medical applications require ASTM/ISO certifications, while aerospace grades often need NADCAP-accredited suppliers. Lead times for specialty alloys can exceed 12 weeks. Consider minimum order quantities (typically 5-50kg for powders) and request material test reports. For prototypes, suppliers like ATI Metals or Carpenter Technology offer small batches.
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