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Rust-Resistant Stainless Steel Duct Elbow | Seamless Industrial Grade

Rust-Resistant Stainless Steel Duct Elbow | Seamless Industrial Grade

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Rust-Resistant Stainless Steel Duct Elbow | Seamless Industrial Grade

​Product Specifications

Attribute Details
​Material ASTM 304/316L ​stainless steel duct elbow (18% Cr, 8% Ni, 2% Mo)
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​Dimensions 1/2" to 24" (DN15-DN600); ​6 inch stainless steel stove pipe elbow standard
​Bend Angles 45°, 90°, 180°, custom bends for ​stainless steel tubing elbows
​Thickness SCH10, SCH40, SCH80 (ASME B16.9 compliant)
​Hardness 150-200 HV (Vickers) for superior machinability
​Surface Finish Polished (Ra ≤0.8 μm), sandblasted, or pickled for corrosion resistance
​Pressure Rating 3000–9000 PSI (20.7–62.1 MPa), ideal for HVAC and industrial ducts
​Certifications ISO 9001, CE, PED, and NACE MR0175 compliant

​Technical Performance

​Tensile Strength

  • ​Grade 304: 515–860 MPa
  • ​Grade 316L: 485–795 MPa

    These values ensure structural integrity in high-pressure systems, validated by hydrostatic testing at 1.5x rated pressure.

​Bending Strength

  • ​Yield Strength: 205–310 MPa (304) / 170–290 MPa (316L)

    Heat-treated (1050°C quench) to enhance ductility, preventing deformation during installation in ​stainless steel tubing elbows.

​Weight Calculation

Formula for ​stainless steel duct elbow weight:

Example: A 90° ​6 inch stainless steel stove pipe elbow (SCH40, 0.114 m³) ≈ 3.2 kg.

​Identification Standards

  • ​ASTM A403: Wrought austenitic stainless steel fittings
  • ​ASME B16.9: Factory-made butt-welding elbows
  • ​MSS SP-43: Light-duty corrosion-resistant welds

​Why Stainless Steel Rusts

While ​stainless steel duct elbow is corrosion-resistant, rust may occur due to:

  1. ​Chloride Exposure: Coastal or chemical environments degrade the chromium oxide layer.
  2. ​Mechanical Damage: Scratches from improper handling expose the iron substrate.
  3. ​Low Oxygen: Stagnant water in joints causes crevice corrosion.
  4. ​Substandard Alloys: Impurities reduce chromium content (e.g., non-304/316L grades).

​Key Features

  1. ​Seamless Industrial Design
    Cold-drawn and solution-annealed ​stainless steel duct elbow ensures uniform grain structure, minimizing weak points in high-stress ducts.

  2. ​High-Temperature Resilience
    Withstands up to 1150°C (2100°F) in industrial ovens, exhausts, and ​6 inch stainless steel stove pipe elbow applications.

  3. ​Versatile Applications
    Ideal for HVAC systems, chemical plants, and ​stainless steel tubing elbows in marine environments.

  4. ​Easy Maintenance
    Smooth, non-porous surfaces resist grease buildup, simplifying cleaning in food processing or pharmaceutical ducts.

​Why Choose Our Stainless Steel Elbows?

  1. ​Certified Material Traceability
    All ​stainless steel duct elbow products include Mill Test Reports (MTRs) verifying ASTM 304/316L compliance.

  2. ​Advanced Manufacturing
    Precision hot extrusion and CNC machining ensure ±0.1mm tolerance for seamless integration.

  3. ​Global Compliance
    Meet ASME, DIN, and JIS standards for international projects.

  4. ​Eco-Friendly Production
    Made with 70% recycled steel, reducing carbon footprint without compromising durability.

  5. ​Custom Solutions
    Tailor bends (22.5°–180°), thicknesses (2–50 mm), and finishes for unique ​stainless steel tubing elbows.

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