Stainless Steel 304 Thin Wall Tubes Manufacturer, Stockist and Exporter
Grade 304 is the tube most buyers reach for once they know they need thin-wall construction and nothing in the job specifically calls for chloride resistance. SS 304 thin wall tubes have been produced by Amardeep Steel Center in Mumbai according to ASTM A269 and ASTM A213 standards. The tubes have been made using cold drawn process with outer diameters of 0.5 to 50.8 mm and wall thickness varying from 0.10 to 3.00 mm. The company has been providing tubes to various industries including instrumentation, medical devices, automotive and general process industries from 1982. If your application involves seawater, coastal air or aggressive chemical exposure, our SS 316 pipes & tubes range is the safer step up, and we stock that too; our team will tell you plainly which one fits your job.
High-Precision Stainless Steel 304 Thin-Wall Tubing
Thin-wall stainless steel 304 tubes are a variety of pipes and tubes known for their very high ratio between outer diameter and its wall thickness. Grade 304 is an austenitic chromium-nickel alloy that provides excellent resistance to atmospheric conditions, organic substances, and many inorganic solutions. With the reduction in wall thickness in these tubes while the tensile strength still as high as possible, SS 304 thin-wall tubes allow design engineers to reduce the overall weight of constructions while maintaining pressure capability.
Technical Data
SS 304 Thin Wall Tube Specification
| Specification | Detail |
|---|---|
Standard | ASTM A269, ASTM A213, ASTM A450 |
Grade | SS 304, SS 304L, UNS S30400, Werkstoff 1.4301, JIS SUS 304 |
Outer diameter | 0.5 mm to 50.8 mm |
Wall thickness | 0.10 mm to 3.00 mm |
Construction | Seamless or welded |
Condition | Annealed or hard, depending on size and application |
Length | Cut to length or straight lengths up to 9 metres |
Surface finish | Bright annealed, electropolished, mechanically polished, or annealed and pickled |
Certification | EN 10204 3.1 Mill Test Certificate standard, 3.2 on request |
Chemical Composition (ASTM A269 Grade 304)
| Grade | C (max) | Mn (max) | Si (max) | P (max) | S (max) | Cr | Ni |
|---|---|---|---|---|---|---|---|
SS 304 | 0.08% | 2.00% | 0.75% | 0.045% | 0.030% | 18.0% to 20.0% | 8.0% to 10.5% |
SS 304L | 0.030% | 2.00% | 0.75% | 0.045% | 0.030% | 18.0% to 20.0% | 8.0% to 12.0% |
Mechanical Strength Parameters SS 304 Thin Wall Tube
| Property | 304 | 304L |
|---|---|---|
Tensile strength, minimum | 515 MPa (75000 psi) | 485 MPa (70000 psi) |
Yield strength, 0.2 percent proof, minimum | 205 MPa (30000 psi) | 170 MPa (25000 psi) |
Elongation in 50 mm, minimum | 35 percent | 35 percent |
Hardness, maximum | 92 HRB | 92 HRB |
Solution annealing temperature | Approximately 1040 C, followed by rapid cooling | Approximately 1040 C, followed by rapid cooling |
Standard Size and Thickness Availability Chart of Stainless Steel 304 Thin Wall Tubes
| Outer Diameter (OD) | BWG 22 (0.71 mm) | BWG 24 (0.56 mm) | BWG 28 (0.35 mm) | BWG 30 (0.25 mm) |
|---|---|---|---|---|
1/8 inch (3.18 mm) | Stocked | Stocked | Stocked | Custom Order |
1/4 inch (6.35 mm) | Stocked | Stocked | Stocked | Stocked |
3/8 inch (9.53 mm) | Stocked | Stocked | Custom Order | Custom Order |
1/2 inch (12.70 mm) | Stocked | Stocked | Custom Order | Not Available |
1 inch (25.40 mm) | Stocked | Stocked | Custom Order | Not Available |
SS 304 Thin Wall Tube Working Pressure Guide
| Outer diameter (mm) | Wall thickness (mm) | Indicative working pressure (bar) |
|---|---|---|
3.00 | 0.30 | Approximately 190 |
6.00 | 0.50 | Approximately 220 |
10.00 | 0.50 | Approximately 150 |
15.00 | 1.00 | Approximately 200 |
20.00 | 1.00 | Approximately 150 |
Equivalent Grades for SS 304 Thin Wall Tubing
| Standard | UNS | Werkstoff | EN name | JIS |
|---|---|---|---|---|
SS 304 | S30400 | 1.4301 | X5CrNi18 10 | SUS 304 |
SS 304L | S30403 | 1.4306 | X2CrNi19 11 | SUS 304L |
304 Grade Stainless Steel Thin Wall Tubing Dimension Chart
| Outer diameter (mm) | Inner diameter (mm) | Wall thickness (mm) |
|---|---|---|
2.00 | 1.50 | 0.25 |
3.00 | 2.40 | 0.30 |
4.00 | 2.00 | 1.00 |
5.00 | 4.00 | 0.50 |
6.00 | 5.00 | 0.50 |
8.00 | 7.00 | 0.50 |
10.00 | 9.00 | 0.50 |
12.00 | 10.00 | 1.00 |
15.00 | 13.00 | 1.00 |
20.00 | 18.00 | 1.00 |
Dimensional Tolerances for SS 304 Thin Wall Tube
| Parameter | Tolerance |
|---|---|
Outer diameter | Plus or minus 0.75 percent, with a minimum of plus or minus 0.02 mm |
Wall thickness | Plus or minus 10 percent |
Key Industrial Applications
- Medical Devices: Manufacturing of hypodermic needles, surgical cannulas, and endoscopic components requiring precise dimensions.
- Aerospace and Defence: Low-pressure fuel lines, sensor protection sleeves, and lightweight structural tubing.
- Heat Exchangers and HVAC: Thin-wall condenser tubes and evaporators engineered for rapid heat transfer efficiency.
- Food and Chemical Processing: Sanitary lines and fluid handling equipment demanding micro-polished smooth internal surfaces.
Get a Quote for SS 304 Thin Wall Tubes
Amardeep Steel Centre supplies SS 304 thin wall tubes with complete documentation, including EN 10204 3.1 Mill Test Certificate and third-party inspection on request. Request a quote with your outer diameter, wall thickness and quantity, and our team will confirm price and availability the same working day.
Frequently Asked Questions About SS 304 Thin Wall Tubes
What is an SS 304 thin wall tube?
It is a cold drawn stainless steel tube made to ASTM A269 or ASTM A213 in grade 304, built with an outer diameter to wall thickness ratio above about fifteen or twenty to one. The thin wall keeps weight low while grade 304 provides solid, cost effective corrosion resistance for general duty.
What is the difference between SS 304 thin wall tube and standard wall 304 tube?
Thin wall tube trades some pressure capability for lower weight, faster heat transfer and a tighter achievable bend radius. Standard wall tube carries a heavier wall for the same outer diameter, giving higher pressure capability and more tolerance for rough handling during fabrication.
What sizes are available in SS 304 thin wall tubing?
We stock outer diameters from 0.5 mm up to 50.8 mm, with wall thicknesses from 0.10 mm to 3.00 mm. Sizes outside this range can be discussed on request.
Is SS 304 thin wall tube available in seamless and welded construction?
Yes. Seamless tube is drawn from solid billet with no weld line and carries a higher pressure rating. Welded tube is formed from strip, welded, then drawn down to final size, and is a more economical route for general instrumentation duty.
What is the maximum working pressure for SS 304 thin wall tubing?
Working pressure depends on the specific outer diameter and wall thickness combination rather than one fixed figure. Wall thickness affects pressure capability far more than outer diameter does, so confirm the exact rating for your combination before specifying a pressure critical line.
Can SS 304 thin wall tube be bent to a tight radius without cracking?
Yes, that is one of the main reasons it gets specified. Press bending, rotary draw bending and roll bending are the usual methods, with a mandrel supporting the bore on tighter radii and a wiper die controlling the outer wall to prevent wrinkling. Annealed condition tube bends more readily than hard condition tube.
Which industries use SS 304 thin wall tubes?
Instrumentation and control panels, medical devices, automotive sensing and fuel lines, aerospace assemblies, HVAC and refrigeration, and general process instrumentation are the most common users wherever chloride exposure is not a concern.
Where can I buy SS 304 thin wall tubes?
Amardeep Steel Centre stocks SS 304 thin wall tubes ex stock in Mumbai and exports to more than 40 countries, with EN 10204 3.1 Mill Test Certificates supplied as standard. Send your outer diameter, wall thickness and quantity for a same day quotation.
Related Products
304 family: SS 304 Seamless Capillary Tubes, SS 304 Capillary Tubes, SS 304L Pipes & Tubes, SS 304 Micro Tubing, SS 304 Coil Tubing Manufacturer
