Stainless Steel 316 Welded / ERW Micro Tubes Manufacturer and Supplier in India
Stainless Steel 316 Welded / ERW Micro Tubes are precision made to achieve controlled dimensions, clean surfaces and consistent corrosion resistance. These tubes come in diameters from 1.6 mm to 12.7 mm and are used in compact instrumentation systems, fluid-control systems, hydraulic and pneumatic systems, laboratory and pharmaceutical systems. They are made of SS 316 and 316L material and are excellent in resisting pitting and chloride corrosion, and precision drawing ensures that the wall thickness and dimensional accuracy are consistent. They are welded via the ERW (electric resistance welding) to offer structural strength for small bore service lines and signal/fluid transmission applications. Amardeep Steel is a trusted manufacturer and supplier of SS 316 Welded/ERW Micro Tubes with controlled size and quality production as per demanding industry requirement in India.
Technical Data
Specifications of Stainless Steel 316 Welded / ERW Micro Tubes
| Specification Parameter | Technical Range / Detail |
|---|---|
Outer Diameter (OD) | 1.59 mm to 25.40 mm (1/16″ to 1.00″) |
Wall Thickness (WT) | 0.25 mm to 2.11 mm (0.010″ to 0.083″) |
Dimensional Tolerances | ASTM A269 / ASTM A249 / EN 10216-5 Class T3/D3 |
Applicable Tubing Standards | Seamless: ASTM A213 / ASTM A269 |
Separated Pipe Standards (Reference) | ASTM A312 (Standard Bore Process Pipe — See general SS Pipe page) |
Supply Form | Continuous Coils (up to 2,000 meters depending on OD) & Straight Lengths (6 meters standard) |
Surface Finish | Bright Annealed (BA), Annealed & Pickled (AP), Electro-Polished (EP, 15 Ra Max) |
Weld Seam Condition | Fully cold-worked bead-beaten weld seam (100% smooth ID/OD profile, Eddy Current tested) |
Chemical Compositions of Stainless Steel 316 Welded Tubes
| Alloy Grade | Carbon (C) | Molybdenum (Mo) | Chromium (Cr) | Nickel (Ni) | Manganese (Mn) | Silicon (Si) | Phosphorus (P) | Sulfur (S) |
|---|---|---|---|---|---|---|---|---|
SS 316 | 0.080 max | 2.00 – 3.00 | 16.0 – 18.0 | 10.0 – 14.0 | 2.00 max | 0.75 max | 0.045 max | 0.030 max |
SS 316L | 0.030 max | 2.00 – 3.00 | 16.0 – 18.0 | 10.0 – 14.0 | 2.00 max | 0.75 max | 0.045 max | 0.030 max |
Stainless Steel 316 Welded / ERW Micro Tubes Mechanical Properties
| Property Parameter | Grade SS 316 | Grade SS 316L |
|---|---|---|
Tensile Strength, min. | 515 MPa (75,000 psi) | 485 MPa (70,000 psi) |
Yield Strength (0.2% Offset), min. | 205 MPa (30,000 psi) | 170 MPa (25,000 psi) |
Elongation (% in 2 inches / 50mm), min. | 35% | 35% |
Hardness (Rockwell B), max. | 90 HRB | 90 HRB |
Equivalent Standards for Stainless Steel 316 Welded / ERW Micro Tubes
| Material Grade | UNS Designation | Werkstoff-Nr. (W.Nr.) | EN Standard / Designation | JIS Standard | BS Standard |
|---|---|---|---|---|---|
SS 316 | UNS S31600 | 1.4401 / 1.4436 | X5CrNiMo17-12-2 | SUS 316 | 316S31 |
SS 316L | UNS S31603 | 1.4404 / 1.4435 | X2CrNiMo17-12-2 | SUS 316L | 316S11 |
Pressure Rating Chart of Stainless Steel 316 Welded / ERW Micro Tubes
| Tube Outer Diameter (OD) | Wall Thickness (WT) | Inside Diameter (ID) | Calculated Burst Pressure (psi) | Theoretical Working Pressure (psi) | Theoretical Working Pressure (bar) |
|---|---|---|---|---|---|
1/16″ (0.0625″ / 1.59 mm) | 0.010″ (0.25 mm) | 0.0425″ (1.09 mm) | 24,000 | 6,000 | 414 bar |
1/16″ (0.0625″ / 1.59 mm) | 0.020″ (0.51 mm) | 0.0225″ (0.57 mm) | 48,000 | 12,000 | 827 bar |
1/8″ (0.125″ / 3.18 mm) | 0.028″ (0.71 mm) | 0.0690″ (1.75 mm) | 33,600 | 8,400 | 579 bar |
1/8″ (0.125″ / 3.18 mm) | 0.035″ (0.89 mm) | 0.0550″ (1.40 mm) | 42,000 | 10,500 | 724 bar |
1/4″ (0.250″ / 6.35 mm) | 0.035″ (0.89 mm) | 0.1800″ (4.57 mm) | 21,000 | 5,250 | 362 bar |
1/4″ (0.250″ / 6.35 mm) | 0.049″ (1.24 mm) | 0.1520″ (3.86 mm) | 29,400 | 7,350 | 507 bar |
1/4″ (0.250″ / 6.35 mm) | 0.065″ (1.65 mm) | 0.1200″ (3.05 mm) | 39,000 | 9,750 | 672 bar |
3/8″ (0.375″ / 9.53 mm) | 0.035″ (0.89 mm) | 0.3050″ (7.75 mm) | 14,000 | 3,500 | 241 bar |
3/8″ (0.375″ / 9.53 mm) | 0.049″ (1.24 mm) | 0.2770″ (7.04 mm) | 19,600 | 4,900 | 338 bar |
3/8″ (0.375″ / 9.53 mm) | 0.065″ (1.65 mm) | 0.2450″ (6.22 mm) | 26,000 | 6,500 | 448 bar |
1/2″ (0.500″ / 12.70 mm) | 0.035″ (0.89 mm) | 0.4300″ (10.92 mm) | 10,500 | 2,625 | 181 bar |
1/2″ (0.500″ / 12.70 mm) | 0.049″ (1.24 mm) | 0.4020″ (10.21 mm) | 14,700 | 3,675 | 253 bar |
1/2″ (0.500″ / 12.70 mm) | 0.065″ (1.65 mm) | 0.3700″ (9.40 mm) | 19,500 | 4,875 | 336 bar |
3/4″ (0.750″ / 19.05 mm) | 0.049″ (1.24 mm) | 0.6520″ (16.56 mm) | 9,800 | 2,450 | 169 bar |
3/4″ (0.750″ / 19.05 mm) | 0.065″ (1.65 mm) | 0.6200″ (15.75 mm) | 13,000 | 3,250 | 224 bar |
1.00″ (1.000″ / 25.40 mm) | 0.065″ (1.65 mm) | 0.8700″ (22.10 mm) | 9,750 | 2,438 | 168 bar |
1.00″ (1.000″ / 25.40 mm) | 0.083″ (2.11 mm) | 0.8340″ (21.18 mm) | 12,450 | 3,113 | 215 bar |
Types of Stainless Steel 316 Welded / ERW Micro Tubes
Large Diameter Stainless Steel Welded Pipe
ASTM A312 Stainless Steel Welded Pipe
Spiral Welded Stainless Steel Pipe
Schedule 40 Welded Stainless Steel Pipe
Stainless Steel 304 Welded Pipe
Stainless Steel 316 Welded Pipe
Stainless Steel Welded Round Pipes
Stainless Steel Welded Rectangular Pipe
Applications and Industrial Uses of Stainless Steel 316 Welded / ERW Micro Tubes
- Instrumentation Systems
- Hydraulic Systems
- Pneumatic Systems
- Laboratory Equipment
- Pharmaceutical Equipment
- Medical Equipment
- Chemical Processing
- Oil & Gas Instrumentation
Frequently Asked Questions
What are Stainless Steel 316 Welded Micro Tubes?
Stainless Steel 316 Welded Micro Tubes are small-diameter tubes made by forming and welding SS 316 strip, offering good corrosion resistance and dimensional accuracy.
What is the difference between SS 316 seamless and welded micro tubes?
SS 316 seamless micro tubes are made without a weld seam, while welded micro tubes are formed from strip and joined by welding. Welded tubes generally offer better dimensional consistency and cost efficiency.
What is the difference between SS 316 and SS 316L Micro Tubes?
SS 316L has a lower carbon content than SS 316, providing better resistance to carbide precipitation during welding. SS 316 is generally preferred where higher strength is required.
Are Stainless Steel 316 Welded Micro Tubes corrosion resistant?
Yes, SS 316 Welded Micro Tubes provide excellent corrosion resistance, particularly against chlorides and many chemicals.
Can SS 316 ERW Micro Tubes be used in chemical processing?
Yes, SS 316 ERW Micro Tubes are suitable for chemical processing, including fluid transfer, sampling, instrumentation, and corrosive-service applications.
