ASTM A269 316L Stainless Steel Capillary Tube Thin Wall Precision Tubing
Short Description:
ASTM A269 316L Stainless Steel Capillary Tube is a precision thin wall tubing product with enhanced corrosion resistance, excellent surface quality and accurate dimensional control. SAKY STEEL supplies customized OD, wall thickness, length and inspection documentation for precision applications.
316L Stainless Steel Capillary Tube Overview
ASTM A269 316L Stainless Steel Capillary Tube is a precision thin wall stainless steel tubing product manufactured for applications requiring enhanced corrosion resistance, accurate dimensions and excellent surface quality. The addition of molybdenum improves resistance to chloride-containing environments compared with conventional 304 stainless steel.
SAKY STEEL supplies 316L stainless steel capillary tubes with customized outside diameter, wall thickness, length and surface finish. The tubing can be produced according to ASTM A269 requirements with material traceability and inspection documentation available when specified.
Material Selection Note
316L stainless steel capillary tube is selected when improved corrosion resistance is required. Application suitability should consider chloride concentration, temperature, chemical media, pressure conditions and required service life.
Product Specifications
| Item | Specification |
|---|---|
| Grade | 316L / UNS S31603 |
| Standard | ASTM A269 |
| Product Type | Stainless Steel Capillary Tube |
| Wall Thickness | Thin Wall Customized |
| Outside Diameter | Small Diameter Customized |
| Surface | Bright Annealed / Polished |
| Length | Fixed Length / Customized |
| Certificate | MTC / EN 10204 3.1 Available |
Key Features of 316L Stainless Steel Capillary Tube
- Enhanced corrosion resistance compared with 304 stainless steel.
- Suitable for thin wall and precision tubing requirements.
- Excellent surface quality for precision applications.
- Good weldability and fabrication performance.
- Available with customized dimensions and inspection requirements.
Chemical Composition of 316L Stainless Steel Capillary Tube
316L stainless steel is an austenitic chromium-nickel-molybdenum stainless steel. The addition of molybdenum improves resistance to chloride corrosion and enhances performance in more demanding environments.
| Element | Content |
|---|---|
| Carbon (C) | ≤0.03% |
| Chromium (Cr) | 16.0-18.0% |
| Nickel (Ni) | 10.0-14.0% |
| Molybdenum (Mo) | 2.0-3.0% |
| Manganese (Mn) | ≤2.0% |
| Silicon (Si) | ≤1.0% |
| Iron (Fe) | Balance |
Actual chemical composition shall be confirmed according to ASTM A269 requirements and material test certificate.
Mechanical Properties of 316L Stainless Steel Capillary Tube
Mechanical properties depend on tube manufacturing method, heat treatment condition, dimensions and applicable ASTM A269 requirements.
| Property | Typical Requirement |
|---|---|
| Tensile Strength | ≥485 MPa |
| Yield Strength | ≥170 MPa |
| Elongation | ≥35% |
| Hardness | According to ASTM A269 requirements |
Common Size Range of 316L Capillary Tube
316L stainless steel capillary tubes are mainly supplied according to customer requirements. Small outside diameters, thin wall thicknesses and precise tolerances can be customized.
| Item | Specification |
|---|---|
| Outside Diameter | Customized Small Diameter |
| Wall Thickness | Thin Wall Customized |
| Length | Fixed Length / Customized |
| Surface | Bright Annealed / Polished |
Test Report
Related Grades Comparison
316L stainless steel capillary tube can be compared with other stainless steel grades based on corrosion resistance, application environment and cost requirements.
| Grade | Main Feature | Relative Cost | Typical Selection |
|---|---|---|---|
| 304 | Good corrosion resistance and excellent formability | Lower | General precision tubing |
| 316L | Better chloride corrosion resistance with molybdenum addition | Medium | Chemical and corrosive environments |
| 904L | Higher corrosion resistance for aggressive media | Higher | Severe corrosion applications |
Manufacturing Process
SAKY STEEL manufactures 316L stainless steel capillary tubes through controlled processes to achieve precise dimensions, stable material performance and reliable surface quality.
Typical production process:
Raw Material Selection → Tube Forming → Heat Treatment → Surface Finishing → Precision Sizing → Inspection → Packaging
- Precision sizing controls outside diameter and wall thickness.
- Heat treatment improves corrosion resistance and material stability.
- Surface finishing ensures smooth and clean tube surfaces.
- Final inspection confirms dimensional and quality requirements.
Inspection and Quality Control
SAKY STEEL provides inspection support for 316L stainless steel capillary tubes to ensure material identification, dimensional accuracy, surface quality and product traceability.
| Inspection Item | Purpose |
|---|---|
| Chemical Analysis | Verify 316L stainless steel chemical composition. |
| Dimensional Inspection | Check outside diameter, wall thickness and length. |
| Surface Inspection | Confirm surface condition and finish quality. |
| Eddy Current Testing | Available when specified for tube integrity inspection. |
| PMI Testing | Available when material identification verification is required. |
| MTC / EN 10204 3.1 | Provide material traceability documentation. |
Applications of 316L Stainless Steel Capillary Tube
316L stainless steel capillary tube is selected for precision applications requiring enhanced corrosion resistance, clean surfaces and accurate dimensional control.
- Chemical analysis and laboratory equipment.
- Precision instrumentation tubing.
- Medical and analytical equipment components.
- Sensor and control system tubing.
- Small diameter fluid and gas transfer systems.
- Corrosion-resistant precision components.
Packaging
SAKY STEEL uses suitable export packaging methods to protect 316L stainless steel capillary tubes during transportation and storage.
- Protective wrapping to prevent scratches and contamination.
- Plastic protection for clean tube surfaces.
- Wooden cases or suitable export packages.
- Customized packaging according to customer requirements.
Why Choose SAKY STEEL?
Precision Stainless Steel Tubing
SAKY STEEL supplies 316L capillary tubes with customized dimensions and precision requirements.
Material Traceability
Heat number tracking and material documentation are available to support quality verification.
Customized Production
Outside diameter, wall thickness, length and surface finish can be customized according to application requirements.
Quality Documentation
MTC, inspection reports and test documentation can be supplied when specified.
Export Support
Professional packaging and international shipment support are provided for global customers.
FAQ
What is ASTM A269 316L stainless steel capillary tube?
ASTM A269 316L stainless steel capillary tube is a precision thin wall tubing product manufactured for applications requiring corrosion resistance, accurate dimensions and reliable surface quality.
What is the difference between 304 and 316L capillary tube?
316L contains molybdenum, which provides improved resistance to chloride corrosion compared with 304 stainless steel. 304 is commonly selected for general applications, while 316L is preferred for more corrosive environments.
Can customized sizes be supplied?
Yes. SAKY STEEL can supply customized outside diameter, wall thickness, length and surface finish according to customer requirements.
Can inspection reports be provided?
Yes. Material certificates, inspection reports and test documentation can be provided according to customer requirements.
What information is needed for quotation?
Please provide grade, outside diameter, wall thickness, length, quantity, surface requirements and any technical specifications.
