321 Stainless Steel Pipes 1.5in, ASTM A409, Heat Scaling, Aerospace Exhaust Ducts
321 Stainless Steel Pipes (1.5" Diameter) by Jiangsu China Steel Union Industrial Co., Ltd are engineered for extreme heat resistance in aerospace exhaust systems, industrial furnaces, and power plant applications. Compliant with ASTM A409, these titanium-stabilized (Ti: 5xC) austenitic stainless steel pipes resist carbide precipitation and heat scaling up to 900°C, ensuring structural integrity under cyclic thermal stress. The 1.5" size balances airflow efficiency and mechanical strength, ideal for jet engine exhaust ducts, afterburner components, and industrial flue gas systems. Seamless manufacturing eliminates weld seams, reducing failure risks in high-vibration environments.
2. Detailed Specifications
| Parameter | Details |
| Material | 321 Stainless Steel (UNS S32100 / ASTM A409 TP321) |
| Element Composition | Cr: 17–19%, Ni: 9–12%, Ti: ≥5xC (0.3–0.6%), C: ≤0.08%, Mn: ≤2%, Si: ≤0.75%, Fe: Balance |
| Dimensions | Nominal Size: 1.5" (48.3mm OD), Wall Thickness: 3.68mm (Schedule 40), Tolerance: ±1% |
| Certifications | ASTM A409, ASME SA409, AMS 5557, EN 10216-5, ISO 9001:2015, PED 2014/68/EU |
| Mechanical Properties | Tensile Strength: ≥515 MPa
Yield Strength: ≥205 MPa
Elongation: ≥40%
Hardness: ≤90 HRB |
| Temperature Range | Continuous: -200°C to 900°C
Intermittent: Up to 925°C (Oxidation Resistance) |
| Surface Finish | Annealed & Pickled, Bead-Blasted, or Mirror-Polished (Ra ≤0.8µm) |
| Applications | Aircraft exhaust manifolds, turbine bleed air systems, heat treatment furnace rollers |
3. Advantages of Importing Our Product
- Aerospace-Grade Quality: AMS 5557-certified with full traceability for defense and aviation projects.
- Thermal Stability: Titanium stabilization prevents sensitization and intergranular corrosion in weld zones.
- Cost Efficiency: 25% lower pricing than U.S./EU competitors due to Jiangsu’s integrated steel production chain.
- Fast Turnaround: 10,000-ton annual capacity; 15-day lead time for ASTM A409-certified batches.
- Technical Support: Custom heat treatment (solution annealing), CNC bending, and NDT services (UT/RT).
4. Key Applications
- Aerospace: Jet engine exhaust ducts, auxiliary power unit (APU) piping, and rocket thrust chamber liners.
- Energy Sector: High-temperature steam lines, boiler superheaters, and waste heat recovery systems.
- Automotive: Turbocharger housings, diesel particulate filter (DPF) assemblies.
- Chemical Processing: Pyrolysis reactor tubes and catalytic converter housings.
Jiangsu China Steel Union Industrial Co., Ltd delivers ASTM A409-compliant 321 stainless steel pipes with unmatched thermal fatigue resistance, precision tolerances, and compliance for mission-critical aerospace, energy, and heavy industry applications.
Q1. What are your company's main products ?
A1: Our main products are stainless steel, carbon steel, galvanized steel, aluminium steel, ppgi steel products, including sheets, pipes, coils, strips, bars and channels.
Q2. What are the advantages of your company ?
A2: We guarantee that the quantity and specification of products are in full compliance with the standards of customer orders. We support any kinds of test. In addition, We also have more professional service and competitive price.
Q3. How do you control quality ?
A3: We provide Factory Test Report, also support Third Party Inspection.
Q4. How many coutries you already exported ?
A4: Exported to more than 50 countries mainly from Middle East, Russia, United States, Canada, Italy, Germany, Australia, Egypt, Chile, Mexico, Venezuela, Argentina, Kuwait, Saudi Arabia, UAE, Sri Lanka, Indonesia, Bangladesh, Turkey, India, etc.
Q5. Can you provide sample ? Do you support OEM ?
A5: Yes. Small samples in store can be provided for free. Customized samples will take about 2-3days.
Q6: What's your payment terms ?
A6: By T/T, L/C (30% deposit in advance, balance 70% before shipment), Western Union, Paypal, or Trade Online.
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ASTM A409 321 Stainless Steel Pipe 1.5 Inch Heat Scaling For Aerospace Exhaust Ducts Images
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