Heavy-Wall Stainless Steel 90 Degree Elbow | 5" Seamless Flow

Heavy-Wall Stainless Steel 90 Degree Elbow | 5" Seamless Flow

Product Specifications

Key Properties

1. Tensile & Yield Strength

   • 316L: Delivers tensile strength of 485–620 MPa (70,340–89,923 psi) and yield strength ≥205 MPa (29,740 psi), enhanced by 2–3% molybdenum for superior chloride resistance. Ideal for stainless steel butt welded elbow systems in marine or chemical processing plants.
   • 304L: Provides 515–690 MPa tensile strength with low carbon (≤0.03%), reducing intergranular corrosion risks in welded joints.

2. Bend Strength & Formability

   • Both grades exhibit ≥40% elongation, enabling tight-radius bends (R=1D) for stainless steel adjustable elbow designs without cracking. Cold-formed variants achieve up to 550 MPa strength for high-pressure HVAC systems.

3. Corrosion Resistance

   • Chromium (16–20%) and nickel (8–11%) form a self-repairing oxide layer. 316L outperforms in saltwater/pH extremes, while 304L resists organic acids in food processing.

Identification & Marking

• International Standards: Laser-etched codes include heat batch numbers, grade certifications (ASTM/EN/JIS), and MTR (Mill Test Reports).
• Traceability: Complies with ISO 15156 for oil/gas and FDA standards for sanitary systems.

Weight Calculation

Use the formula:
$\text{Weight (kg)}=\text{Thickness (mm)}\times \text{Width (m)}\times \text{Length (m)}\times \text{Density (7.93 g/cm³)}$
Example: A 6 mm thick stainless steel duct elbow (1.2m × 2.4m) weighs:
$6\times 1.2\times 2.4\times 7.93=137.4\text{kg}$.

Why Stainless Steel Rusts?

Despite its corrosion resistance, degradation occurs under specific conditions:

1. Chloride Exposure: Saltwater or de-icing agents penetrate the oxide layer, causing localized pitting. Critical for stainless steel duct elbow in coastal areas.
2. Mechanical Damage: Scratches from abrasive tools expose the iron matrix, initiating rust.
3. Low Oxygen Environments: Stagnant water in crevices inhibits oxide regeneration, leading to crevice corrosion.
4. High-Temperature Oxidation: Prolonged exposure above 870°C degrades protective films, accelerating scaling.

Applications

• Stainless Steel Adjustable Elbow: Precision bends (R=1D–10D) for HVAC, chemical plants, and shipbuilding.
• Stainless Steel Butt Welded Elbow: Mandrel-bent designs (Sch10–Sch160) for petrochemical pipelines, withstanding 800°C temperatures.
• Stainless Steel Duct Elbow: Mirror-polished (Ra ≤0.4µm) bends for pharmaceutical cleanrooms and food-grade ducting.

Why Choose Our Stainless Steel Elbows?

1. Dual-Certified Quality: ISO 9001 and ASME B16.9 compliance, with raw materials sourced from TISCO/Baosteel.
2. Precision Customization: CNC machining for 5" or stainless steel adjustable elbow designs, including perforated/grooved patterns.
3. Global Logistics: 10,000+ ton inventory with air/sea shipping (MOQ: 1 ton) and 7–25-day lead times.
4. Sustainability: 90% recycled content and full recyclability, meeting eco-friendly manufacturing standards.
5. Technical Support: 24/7 engineering assistance for corrosion prevention, installation, and custom fabrication.