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Implant Stainless Steel

What is Implantable Grade
Stainless Steel?

Stainless steel with austenitic organisation at room temperature becomes austenitic stainless steel, the chromium content is generally between 16%-26%, austenitic mainly by cold working to strengthen the hardness, because of its low carbon content, welding performance is better, corrosion resistance is also very good. It has excellent corrosion resistance and is used more in conventional medical devices, such as: puncture products, handles, and non-critical parts of the product.

Corrosion-Resistant Medical Austenitic Stainless Steel

  • Advantages

    Iron-Chromium-Nickel ternary alloy

    Better corrosion resistance

    High wear resistance

    High fatigue strength

    High toughness

  • Disadvantages

    Corrosion reduces long-term implant stability

    Elastic modulus mismatch causes stress shielding.

    Nickel ions cause allergies in ~20% of people, ~5% severely.

    Poor bioactivity, hindering firm integration with biological tissue

  • Tendencies

    Still the main material for bio-implants

    Developing alloys with high corrosion, wear, fatigue resistance, and toughness.

    Nickel-free or low-nickel high-nitrogen stainless steel offers excellent mechanics and corrosion resistance.

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