Cold Rolled Stainless Steel Tube Ni 8-12 Percent AISI 304 304L Capillary Inox Tube 316L 201 202 Round Square Rectangular
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Product Description
Cold Rolled Stainless Steel Tube Ni 8-12 Percent AISI 304 304L Capillary Inox Tube 316L 201 202 Round Square Rectangular
304 Stainless Steel Capillary Tube 1.0mm-1.6mm Stainless Steel Precision Tube
321 stainless steel pipe (UNS S32100) is a titanium-stabilized austenitic stainless steel pipe derived from 304 stainless steel, with titanium added to suppress intergranular corrosion caused by chromium carbide precipitation. It excels in high-temperature resistance, corrosion resistance, and mechanical stability, making it a preferred choice for harsh-environment applications such as industrial high-temperature pipelines and chemical processing equipment.
Core Product Overview & Standards
Key Grades:
- 321 (UNS S32100): Standard grade with a maximum carbon content of 0.08%, optimized for general high-temperature and corrosion-resistant scenarios
- 321H (UNS S32109): High-carbon variant (carbon content 0.04-0.10%) designed for enhanced creep resistance and strength at temperatures above 537°C (1000°F)
International Standards:
- ASTM/ASME: A312/SA312 (seamless/welded stainless steel pipes), B36.10M/B36.19M (dimensional specifications)
- DIN: 1.4541 (equivalent material number)
- JIS/SUS, GB, AISI (regional mainstream standards)
Key Technical Parameters
Chemical Composition (Weight %):
| Element | C | Si | Mn | Cr | Ni | S | P | Ti | Fe |
|---|---|---|---|---|---|---|---|---|---|
| 321 | ≤0.08 | ≤0.75 | ≤2.0 | 17.0-19.0 | 9.0-12.0 | ≤0.03 | ≤0.045 | 5×(C+N)-0.70 | Balance |
| 321H | 0.04-0.10 | ≤0.75 | ≤2.0 | 17.0-19.0 | 9.0-12.0 | ≤0.03 | ≤0.045 | 5×(C+N)-0.70 | Balance |
Mechanical Properties (Annealed State):
| Grade | Tensile Strength (MPa, min) | Yield Strength (σ0.2, MPa, min) | Elongation (δ5, %, min) | Hardness (max) |
|---|---|---|---|---|
| 321 | 520 | 205 | 40 | 187 HB / 90 HRB / 200 HV |
| 321H | 520 | 205 | 40 | 217 HB |
Physical Properties:
- Density: 7.93 g/cm³ (0.286 lbm/in³)
- Operating Temperature Range: -270°C (cryogenic) to 816°C (oxidation-resistant up to 1500°F)
- Thermal Expansion Coefficient: 9.2×10/°C (68-212°F)
- Modulus of Elasticity: 200 GPa (28×10 psi) at 20°C
Dimensional Specifications:
| Type | Outer Diameter (OD) | Wall Thickness | Length | End Types |
|---|---|---|---|---|
| Seamless Pipe | 6 mm - 914.4 mm | 2.5 mm - 30 mm | 6-12 m (customizable) | Plain end, beveled end, threaded |
| Welded Pipe (ERW/SAW) | 9.5 mm - 1200 mm | 0.3 mm - 40 mm | 6-12 m (customizable) | Plain end, butt weld end |
| Shapes | Round, square, rectangular, hexagonal, U-shaped | |||
| Schedules | Sch 5, Sch 10, Sch 40, Sch 80, Sch 160, XXS, etc. | |||
Core Performance Advantages
- Superior High-Temperature Stability: Resists oxidation at 816°C and offers better creep and stress rupture properties than 304/304L
- Intergranular Corrosion Resistance: Titanium stabilization prevents chromium depletion in the 427-816°C range, avoiding intergranular corrosion even after welding or heat treatment
- Broad Corrosion Resistance: Comparable to 304 in general corrosion resistance; suitable for dilute organic acids, pure phosphoric acid (low temperature), and 10% dilute acid solutions (high temperature)
- Excellent Toughness: Maintains good low-temperature toughness (down to cryogenic levels) and formability
Typical Applications
- Aerospace: Aircraft piston engine manifolds, exhaust stacks
- Petrochemical & Refining: Heat exchangers, furnace parts, refinery pipelines, expansion joints
- Chemical Industry: High-temperature chemical process equipment, pipelines for dilute acids
- Energy & Power: Thermal oxidizers, boiler tubes, and high-temperature flue gas pipelines
- Food & Pharmaceutical: Food processing equipment, brewery pipelines, and pharmaceutical machinery
- Mechanical Engineering: Auto parts, structural components, and furniture/kitchenware
Limitations & Selection Notes
- Chloride Sensitivity: Not suitable for chloride-rich environments or sulfuric acid solutions
- Machinability: Titanium addition reduces machinability compared to 304
- Grade Selection: Choose 321 for temperatures ≤537°C; opt for 321H for long-term service above 537°C
- Certifications: Prioritize products with ISO, SGS, or BV certifications
Manufacturing & Quality Control
- Processes: Hot rolling, cold rolling (seamless), electric resistance welding (ERW), submerged arc welding (SAW)
- Surface Treatments: Black oxide, pickling, polished (No.4/BA), satin, mirror finish, electropolishing
- Mandatory Inspections: Hydrostatic pressure testing, non-destructive testing, chemical composition analysis, and mechanical property testing
Detailed Photos
Surface Finishes
Packaging & Shipping
Company Profile
Our company offers variety of products which can meet your multifarious demands. We adhere to the management principles of "quality first, customer first and credit-based", since the establishment of the company and always to do our best to satisfy potential needs of our customers. Our company is sincerely to willing to cooperate with enterprises from all over the world in order to realize a win-win situation since the trend of economic globalization has developed with irresistible force.
Quality Control
Certifications
Frequently Asked Questions
Q1: Why choose us?
Our company, as an internationally experienced and professional supplier, has been engaged in steel business for more than ten years. We can provide a variety of steel products with high quality to our clients.
Q2: Can you provide OEM/ODM service?
Yes. Please feel free to contact us for more details.
Q3: What is your terms of payment?
100% T/T advance.
30% T/T and balance against copy of documents.
30% T/T advance, balance L/C at sight.
30% T/T and balance against copy of documents.
30% T/T advance, balance L/C at sight.
Q4: Can we visit your factory?
Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case.
Q5: Can you provide sample?
Yes. Sample is free for regular sizes, but the buyer needs to pay freight cost.
Q6: How long is your delivery time?
Regular lead time is 15 to 30 days after receiving deposit.
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Company
Jiangsu Xinyuanxing Metal Products Co.,Ltd
Location
Liangxi District Wuxi ,Jiangsu,China.
Contact Person
Helen