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309S Stainless Steel Plate

309S Stainless Steel Plate is a low-carbon austenitic stainless steel, making it the highly weldable variation of Grade 309. It is characterized by high levels of chromium and nickel, giving it excellent resistance to oxidation and corrosion at elevated temperatures (up to 1830℉ or 980℃). The low carbon content minimizes carbide precipitation during welding, which preserves its corrosion resistance. This plate is primarily used in high-temperature industrial applications, such as furnace components, oven linings, heat exchangers, boiler baffles, and thermowells, where sustained heat and corrosion resistance are critical for long service life.

  • Product Description
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  • Product Measurement
  • Product Packaging
    • Commodity name: 309S Stainless Steel Plate

    309S Stainless Steel Plate is a low-carbon austenitic stainless steel, making it the highly weldable variation of Grade 309. It is characterized by high levels of chromium and nickel, giving it excellent resistance to oxidation and corrosion at elevated temperatures (up to 1830℉ or 980℃). The low carbon content minimizes carbide precipitation during welding, which preserves its corrosion resistance. This plate is primarily used in high-temperature industrial applications, such as furnace components, oven linings, heat exchangers, boiler baffles, and thermowells, where sustained heat and corrosion resistance are critical for long service life.

    309S Stainless Steel Plate Description

    Applications

    Furnace Parts (Doors, Burners, Fans)Heat Exchangers and RecuperatorsBoiler Baffles and Tube HangersKiln Liners and Incinerator ComponentsHigh-Temperature Containers (Annealing Boxes)
    Petroleum Refining EquipmentChemical Processing EquipmentSulfite Liquor Handling EquipmentAircraft and Jet Engine PartsThermal Processing Baskets and Trays

    Product Parameters

    Product Name

    309S Stainless Steel Plate

    Type

    Plate

    Thickness

    0.3mm-200mm

    Length

    2000mm, 2438mm, 3000mm, 5800mm, 6000mm, 12000mm, etc.

    Width

    40mm-600mm1000mm1219mm1500mm1800mm2000mm2500mm3000mm3500mmetc.

    Standard

    ASTM, AISI, JIS, GB, DIN, EN, etc.

    Surface

    BA, 2B, NO.1, NO.4, 4K, HL, 8K, etc.

    Scope of Application

    Widely used in high temperature and electrical industry, medical equipment construction, chemical, food industry, agriculture and ship parts, food and beverage packaging,

    Kitchen supplies, trains, airplanes, conveyor belts, vehicles, bolts, nuts, springs and screens, etc.

    Certificate

    ISO, SGS, BV, etc.

    Production Technology

    Hot Rolling, Cold Rolling

    Edge Processing

    Edging, Trimming

     

    Approximate grade comparison table

    ASTMGBENDINJISGOST
    309S (UNS S30908)0Cr23Ni131.4833 (X6CrNi23-13)X8CrNi23-13 (W. Nr. 1.4833)SUS 309S20Х23Н13 (20Kh23N13)


    Chemical Composition

    C (Carbon)Si (Silicon)Mn (Manganese)P (Phosphorus)S (Sulfur)Cr (Chromium)Ni (Nickel)Fe (Iron)
    ≤0.08≤1.00≤2.00≤0.045≤0.03022.0 - 24.012.0 - 15.0Balance

     

    Mechanical Properties

    Tensile Strength (Rm) (MPa)Yield Strength (Rp0.2) (MPa)Elongation A5 (%)Hardness (HB/HRB/HV)
    ≥520≥205≥40≤187HRB,  ≤90HRB, ≤200HRB

     

    Physical Performance

    Density (g/cm^3)Modulus of Elasticity (GPa)Coefficient of Thermal Expansion (10^-6 / °C) (20-100°C)Coefficient of Thermal Conductivity (W/m·K) (100°C)Electrical Resistivity (micro-Ohm·cm) (20°C)
    ~7.98~200~16.0~15.6 ~78


  • 309S Stainless Steel Plate - Stock Warehouse

     

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  • 309S Stainless Steel Plate - Product Inspection

     

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  • 309S Stainless Steel Plate - Product Measurement

     

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  • 309S Stainless Steel Plate- Product Packaging

     

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