Medical Grade Metals
Metals like stainless steel, titanium, magnesium, and cobalt-chromium are vital for medical implants and devices. OnlineMetals.com offers a wide selection of medical-grade alloys, expert guidance, and custom processing to support the unique needs of the medical industry.
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16/316L and 440 stainless steels as well as the Ti-6Al-4V titanium alloy are available and commonly used in medical device applications for their biocompatibility, corrosion resistance, strength and other key properties outlined above. The primer provides good context on why these particular alloys are chosen for medical use.
High corrosion resistance, especially in chloride environments. Good strength and wear resistance. Medical implants like hip and knee joint replacements, dental implants, surgical devices. Also used for body piercings. Can be heat treated for sharp edges. High corrosion resistance. Surgical tools and devices that require sharp cutting edges.
High strength-to-weight ratio, low elastic modulus, outstanding corrosion resistance from stable oxide layer. Highly biocompatible. Fracture fixation devices, spinal fixation, joint replacement components, dental implants, pacemakers, heart valves, surgical devices.
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FAQ
Key properties include biocompatibility, corrosion resistance, non-magnetic properties, mechanical strength, durability, ability to withstand high temperatures, resistance to wear, clean surface finish, and formability.
Stainless steels offer good strength and corrosion resistance. Cobalt-chromium has superior fatigue and wear resistance. Titanium has high strength-to-weight ratio, low modulus, and biocompatibility. Shape memory alloys have unique properties but are expensive.
Key standards include ASTM F138, F139, F562, F688, F745 for stainless steels and cobalt-chromium alloys. ISO 5832 series covers metallic implant materials. Testing standards like ISO 6892, ASTM E8, and ISO 148 detail tensile and impact testing methods.
Fatigue strength, material composition, corrosion resistance, temperature effects, manufacturing processes, design considerations, testing and analysis, and surface treatments are key factors in selecting metals to resist fatigue failure under cyclic loading.
Critical properties: thermal conductivity (W/m·K), electrical resistivity (Ω·m), temperature coefficient of resistance (Ω·m/K). Measured using techniques like 4-probe, van der Pauw, steady-state, or transient plane source methods. Reported in supplier datasheets at room temp and application-specific temps.
Metals must have a biological evaluation plan, undergo ISO 10993 testing (cytotoxicity, sensitization, irritation, systemic toxicity, hemocompatibility), chemical and physical characterization, risk management, in vitro and in vivo testing, and comprehensive documentation before approval.