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316LRM

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    • About 316LRM :

    316LRM is a low-carbon version of 316 stainless steel, specifically designed for applications requiring enhanced resistance to corrosion and high purity. The “LRM” in 316LRM stands for “Low Residual Metals,” which refers to the specific treatment or processing of the steel to minimize residual elements like sulfur, phosphorus, and other impurities that can degrade material properties. Like standard 316L, 316LRM offers excellent resistance to corrosion, especially in chloride-rich environments, but with additional refinement for applications where cleanliness and high-purity characteristics are essential. This makes it ideal for use in the pharmaceutical, food processing, and chemical industries, as well as medical devices and implants.

    Features:

    • Superior Corrosion Resistance: 316LRM provides excellent resistance to corrosion, especially in environments exposed to chloride ions, such as seawater, and in acidic conditions.
    • Low Carbon Content: The low carbon content reduces the risk of carbide precipitation during welding, ensuring better resistance to intergranular corrosion.
    • Low Residual Metals: The steel is processed to reduce impurities like sulfur and phosphorus, resulting in a purer material with superior mechanical properties and reliability.
    • Biocompatibility: Like 316L, 316LRM is highly biocompatible, making it suitable for use in medical implants and devices that come into contact with the human body.
    • Non-Magnetic: 316LRM remains non-magnetic in the annealed condition, a characteristic desirable in many applications, particularly medical devices.
    • Improved Cleanliness: The low-residual metals improve the material's cleanliness, making it ideal for use in pharmaceutical and food processing applications where hygiene is paramount.
    • Good Weldability: 316LRM can be welded using standard methods such as TIG, MIG, and laser welding, which is critical for manufacturing processes that require intricate designs.

    Specifications:

    • ASTM A240: Standard specification for chromium and chromium-nickel stainless steel plate, sheet, and strip for general applications.
    • ASTM A276: Standard specification for stainless steel bars and shapes, including the low-carbon versions such as 316LRM.
    • UNS S31603: Unified Numbering System designation for 316L and its variants like 316LRM.
    • ISO 5832-1: Standard for metallic materials used in medical implants, ensuring 316LRM is suitable for biomedical applications.
    Product Specification

    Composition of 316LRM Stainless Steel:

    Element Percentage
    Nickel (Ni) 10.0 – 14.0%
    Chromium (Cr) 16.0 – 18.0%
    Molybdenum (Mo) 2.0 – 3.0%
    Iron (Fe) Balance
    Carbon (C) 0.03% Max
    Manganese (Mn) 2.0% Max
    Silicon (Si) 1.0% Max
    Phosphorus (P) 0.045% Max
    Sulfur (S) 0.03% Max

    Physical Properties:

    Property Value
    Density 8.0 g/cm³
    Melting Point 1375–1400°C (2500–2550°F)
    Hardness (Rockwell B) 85-95 HRB
    Tensile Strength 620 MPa (90,000 psi)
    Yield Strength 290 MPa (42,000 psi)
    Elongation 40%
    Modulus of Elasticity 200 GPa
    Thermal Conductivity 16 W/m·K
    Coefficient of Thermal Expansion 16.5 × 10⁻⁶ /°C