Medical Use Metals
Metals like stainless steel, titanium, 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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Medical Use Stainless Steel
Stainless steel alloys are widely used in medical applications due to their corrosion resistance, strength, and ability to withstand repeated sterilization. These grades are commonly selected for medical instruments, surgical tools, and medical equipment, offering a balance of durability and cleanability. Implant-grade stainless steels require separate specifications, and these alloys are intended for instrumentation and equipment use rather than long-term implant applications, many materials meeting the medical instrument spec ASTM F899 (check for availability).
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Explore additional general-purpose Stainless Steel shapes and alloys that are also commonly used in medical applications.
Medical Use Titanium
Titanium alloys are widely used in medical applications for their strength, corrosion resistance, and biocompatibility. Grade 5 and Grade 2 titanium are commonly used for medical instruments, tooling, and equipment components, offering an excellent balance of durability and weight savings. Grade 23 titanium (Ti-6Al-4V ELI) is the only Titanium alloy specifically rated for implant applications (ASTM F136), making it the preferred choice for orthopedic and dental implants requiring long-term biocompatibility.
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Explore additional general-purpose Titanium shapes and alloys that are also commonly used in medical applications.
Medical Use Cobalt Chromium
Cobalt-chromium alloy ASTM F1537 is widely used in medical applications that require exceptional strength, wear resistance, and long-term corrosion performance. This alloy is specifically produced for implantable medical devices, making it a common choice for orthopedic and dental implants such as joint components and load-bearing implant parts. When certified to ASTM F1537, cobalt-chromium alloys are intended for implant use rather than general surgical instruments or equipment.
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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.
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