SUS304 SUS316L Medical Grade Stainless Steel Wire For Surgical Devices

SUS304 SUS316L Medical Grade Stainless Steel Wire For Surgical Devices

Stainless steel 304/316L wires are widely used in medical applications due to their excellent corrosion resistance, durability and mechanical properties. While SUS304 serves excellently for many general surgical instruments, SUS316L is the unequivocal choice for any device requiring long-term implantability or exposure to the harshest in-vivo conditions.

Main Materials:

• SUS304: The most common austenitic stainless steel. It offers excellent corrosion resistance in general environments, good formability, and high strength. It is used for medical devices that do not require the highest level of pitting and crevice corrosion resistance.
• SUS316L: The premium and most widely used grade for implantable and critical surgical devices. The "L" denotes low carbon content (≤0.03%), which minimizes carbide precipitation during welding or processing, preventing susceptibility to intergranular corrosion. The addition of 2-3% Molybdenum (Mo) significantly enhances resistance to pitting and crevice corrosion, particularly in chloride-rich environments (e.g., bodily fluids, saline).

Key Features & Properties:

• Biocompatibility: Non-toxic, non-allergenic, and non-carcinogenic..
• Superior Corrosion Resistance: Especially SUS316L, resisting bodily fluids, chlorides, and sterilants (autoclave, chemicals).
• High Strength & Ductility: Can be supplied in various "tempers" by controlling the amount of cold work:
• Annealed (Soft): High ductility for complex forming.
• Excellent Fabricability: Can be readily welded, machined, formed, and polished.
• Non-Magnetic: Austenitic structure is essentially non-magnetic in the annealed state. Cold working can induce slight magnetism.

Medical Applications:

• Surgical Instruments: Needles, needle holders, curettes, probes, cannulas(especially 304).
• Orthopedic Devices: Cerclage wires, fixation wires (K-wires), sternal wires, suture wires, cables for tension banding.
• Dental Applications: Archwires, orthodontic brackets, endodontic files, posts
• Implantable Components: Structural elements in pacemaker leads, aneurysm clips, stent delivery systems, bone fracture fixation plates/screws (implant-grade 316L).
• Minimally Invasive Devices: Guidewires, catheters, endoscopic components, biopsy needles.
• General Hospital & Veterinary Use: IV stand hooks, surgical trays, baskets, springs in devices.

Non-Medical Applications:

The same high-quality wire is sought after in demanding industries:

• Aerospace: Critical springs, fasteners, sensing components.
• Food & Beverage Processing: Conveyor hooks, mesh, fittings requiring frequent cleaning and corrosion resistance.
• Marine & Chemical: Springs and components in corrosive environments.
• Precision Engineering & Electronics: Springs in connectors, probes, miniature bearings, brush springs.
• Watchmaking: High-quality springs and structural components.