ASTM A269 304 Stainless Steel Capillary Tube Thin Wall Precision Tubing
Short Description:
ASTM A269 304 Stainless Steel Capillary Tube is a precision thin wall stainless steel tubing solution with good corrosion resistance, dimensional accuracy and clean surface quality. Available in customized outside diameter, wall thickness, length and inspection requirements.
304 Stainless Steel Capillary Tube Overview
ASTM A269 304 Stainless Steel Capillary Tube is a precision thin wall stainless steel tubing product designed for applications requiring accurate dimensions, smooth surface finish and reliable corrosion resistance. Made from austenitic 304 stainless steel, this tubing provides good formability, weldability and fabrication performance.
SAKY STEEL supplies 304 stainless steel capillary tubes with customized outside diameter, wall thickness, length and surface requirements. The tubing can be supplied for precision applications where dimensional control and clean surface quality are important.
Material Selection Note
304 stainless steel capillary tube is suitable for general corrosion environments. Selection should consider temperature, chemical media, chloride exposure, pressure requirements and required service performance.
Product Specifications
| Item | Specification |
|---|---|
| Grade | 304 / UNS S30400 |
| 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 or Customized |
| Certificate | MTC / EN 10204 3.1 Available |
304 Stainless Steel Capillary Tube Features
- Precision dimensional control for small diameter tubing.
- Good corrosion resistance for general industrial environments.
- Excellent formability and weldability.
- Smooth internal and external surface options available.
- Suitable for customized thin wall tubing requirements.
Chemical Composition of 304 Stainless Steel Capillary Tube
304 stainless steel is an austenitic chromium-nickel stainless steel. Its chemical composition provides a balanced combination of corrosion resistance, formability and fabrication performance.
| Element | Content |
|---|---|
| Carbon (C) | ≤0.08% |
| Chromium (Cr) | 18.0-20.0% |
| Nickel (Ni) | 8.0-10.5% |
| 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 304 Stainless Steel Capillary Tube
Mechanical properties of ASTM A269 304 stainless steel tubing depend on manufacturing process, heat treatment condition, tube dimensions and applicable specifications.
| Property | Typical Requirement |
|---|---|
| Tensile Strength | ≥515 MPa |
| Yield Strength | ≥205 MPa |
| Elongation | ≥35% |
| Hardness | According to ASTM A269 requirements |
Common Size Range of 304 Capillary Tube
304 stainless steel capillary tubes are supplied according to customer requirements. Common specifications include small outside diameters and thin wall thicknesses for precision applications.
| Item | Range |
|---|---|
| Outside Diameter | Customized Small Diameter |
| Wall Thickness | Thin Wall Customized |
| Length | Fixed Length / Customized |
| Surface | Bright Annealed / Polished |
Test Report
Related Grades Comparison
304 stainless steel capillary tube can be compared with other stainless steel grades according to corrosion resistance, application environment and cost requirements.
| Grade | Main Feature | Relative Cost | Typical Selection |
|---|---|---|---|
| 304 | General corrosion resistance and excellent formability | Medium | General precision tubing applications |
| 316L | Improved chloride corrosion resistance due to molybdenum addition | Higher | Chemical and more corrosive environments |
| 321 | Titanium stabilized for elevated temperature applications | Higher | High temperature tubing requirements |
Manufacturing Process
SAKY STEEL manufactures 304 stainless steel capillary tubes through controlled production processes to achieve accurate dimensions, smooth surfaces and reliable tube performance.
Typical manufacturing process:
Raw Material Selection → Tube Forming → Welding or Seamless Production → Heat Treatment → Surface Finishing → Sizing → Inspection → Packaging
- Precision forming ensures dimensional consistency.
- Heat treatment improves material structure and corrosion resistance.
- Surface finishing provides smooth external and internal surfaces.
- Sizing process helps achieve required diameter and tolerance.
Inspection and Quality Control
SAKY STEEL provides inspection support to verify material quality, dimensional accuracy and surface condition of 304 stainless steel capillary tubes.
| Inspection Item | Purpose |
|---|---|
| Chemical Analysis | Verify stainless steel grade composition. |
| Dimensional Inspection | Check outside diameter, wall thickness and length. |
| Surface Inspection | Verify surface finish and appearance. |
| Eddy Current Testing | Available when specified for tube integrity verification. |
| MTC / EN 10204 3.1 | Provide material traceability documentation. |
Applications of 304 Stainless Steel Capillary Tube
304 stainless steel capillary tubing is widely used in precision applications requiring small diameter tubing, corrosion resistance and dimensional accuracy.
- Instrumentation and measurement systems.
- Laboratory equipment and precision devices.
- Medical and analytical equipment components.
- Sensor and control system tubing.
- Small fluid and gas transfer applications.
- Customized precision stainless steel components.
Packaging
SAKY STEEL uses suitable export packaging methods to protect 304 stainless steel capillary tubes during transportation and storage.
- Protective wrapping to prevent surface damage.
- Plastic protection for clean tube surfaces.
- Wooden cases or pallets for international shipment.
- Customized packaging according to customer requirements.
Why Choose SAKY STEEL?
Precision Stainless Steel Tube Supply
SAKY STEEL provides stainless steel capillary tubes with customized dimensions and precision requirements.
Material Traceability
Material certificates and product documentation are available to support quality verification.
Customized Solutions
Outside diameter, wall thickness, length and surface requirements can be supplied according to customer specifications.
Inspection Support
Dimensional inspection, chemical analysis and tube testing services are available when required.
Export Experience
Professional packaging and international shipment support for global customers.
