Stainless Steel 304 Tube: manufacturer, stockist and exporter in Mumbai, India
Rajgranth Metal & Alloys supplies stainless steel 304 tube (UNS S30400) from Mumbai and exports it to 18 markets.
What is SS 304 tube?
Tube is specified by actual outside diameter and wall thickness, and covers thin walls and, in welded form, square and rectangular sections that pipe schedules do not reach. SS 304 tube is bought for heat exchangers, instrumentation, process lines and structural and decorative work. SS 304 (UNS S30400, EN 1.4301) is the general-purpose austenitic stainless steel, with about 18 percent chromium and 8 percent nickel. It forms, draws and welds well, resists corrosion in most atmospheric, food and mild chemical conditions, and is the grade most buyers mean when they ask for stainless steel.
The default austenitic stainless. 18% chromium, 8% nickel, no molybdenum.
Rajgranth Metal & Alloys lists SS 304 among the grades it supplies and exports from Mumbai.
SS 304 designations and equivalents
| Standard | Designation |
|---|---|
| UNS | S30400 |
| EN / Werkstoff | 1.4301 |
| AISI | 304 |
| JIS | SUS 304 |
Scroll the table horizontally to see all columns.
SS 304 chemical composition
Limits are those of the standard named in the table caption. Product-specific standards for pipe, tube and bar carry their own limits, so always confirm the composition on the mill test certificate supplied with the material.
| Element | Carbon | Manganese | Silicon | Phosphorus | Sulphur | Chromium | Nickel | Nitrogen |
|---|---|---|---|---|---|---|---|---|
| Limit | 0.07 max | 2.00 max | 0.75 max | 0.045 max | 0.030 max | 17.50 – 19.50 | 8.00 – 10.50 | 0.10 max |
Scroll the table horizontally to see all columns.
SS 304 mechanical properties
| Property | Requirement |
|---|---|
| Tensile strength | 515 MPa minimum |
| Yield strength (0.2% offset) | 205 MPa minimum |
| Elongation in 50 mm | 40% minimum |
| Hardness | 92 HRB maximum (201 HBW) |
Scroll the table horizontally to see all columns.
SS 304 tube: sizes and finishes
The published size range, finishes and conditions for tube are set out on the seamless tubes and welded tubes pages, which list every dimension we publish. Sizes outside the range can be produced to order; send the dimensions with your enquiry.
| Parameter | Range |
|---|---|
| Seamless Tubes: Outside diameter | 3.1, 76.2 (mm — larger sizes to order) |
| Seamless Tubes: Wall thickness | 0.71 to 8.0 (SWG, mm) |
| Seamless Tubes: Length | 5 m, 6.5 m (Customised up to 12 m per requirement) |
| Seamless Tubes: Tube ends | Plain, Bevelled |
| Seamless Tubes: Marking | Size, Grade, Specification, Heat number |
| Welded Tubes: Outside diameter | 4.7, 76.2 (mm — larger sizes to order) |
| Welded Tubes: Wall thickness | 0.5 to 3.0 (mm) |
| Welded Tubes: Length | 5 m, 6.5 m (Customised per requirement) |
| Welded Tubes: Tube ends | Plain, Bevelled |
Scroll the table horizontally to see all columns.
Standards for SS 304 tube
SS 304 tube is commonly specified to ASTM A213 / ASME SA-213, ASTM A269 and ASTM A249. Commonly specified product standards. Confirm the standard, edition and any supplementary requirements on your order; we supply to the standard you name.
Why buyers choose SS 304 tube
Good general corrosion resistance in atmospheric, food and dairy service
Excellent formability and deep drawing
Welds readily without special procedures
Where SS 304 tube is used
- Food and dairy equipment
- Architectural cladding and trim
- Kitchen and catering equipment
- Chemical and process tanks in mild service
- General fabrication
What to state when you enquire for SS 304 tube
- Outside diameter and wall thickness in mm, and tolerance class
- Seamless or welded
- Section: round, square or rectangular (welded)
- Length, and whether cut to length
- Finish: bright annealed, solution annealed, polished or electropolished
- The standard, and the test certificate required
What to check on SS 304 tube before and after delivery
On SS 304 tube, wall-thickness tolerance, ovality and surface condition decide acceptance, so measure them on the first delivery. For heat-exchanger and instrument duty check the tolerance class and the cleanliness of the bore against your specification. Confirm the composition on the mill test certificate. Grade limits to design around: pits and crevice-corrodes in chloride environments such as coastal air and brine and sensitisation can follow welding of thick sections, where 304L is preferred.
Export of SS 304 tube from India
SS 304 tube is exported from Mumbai to 18 confirmed markets, quoted with the Incoterm and named port.
SS 304 compared with similar grades
Buyers who look at SS 304 tube usually also compare SS 304L, SS 316 and SS 202. The grade pages below give each one's designations, properties and limits side by side so you can choose for the service rather than the price alone.
FAQ
09Questions answered
- Should I specify 304 or 304L?
- 304L has lower carbon, which avoids sensitisation after welding, so it is the better choice for welded thick sections and for service that could cause intergranular attack. For thin, non-welded parts, 304 is fine.
- Is SS 304 food grade?
- 304 is widely used in food and dairy equipment because it is easy to clean and does not taint food. Confirm the finish and the regulation that applies to your product.
- Can SS 304 be used in seawater?
- No. Chlorides cause pitting and crevice corrosion in 304. Use 316 for splash and mild marine exposure, and duplex, super duplex or a nickel alloy for immersion.
- What tolerance can SS 304 tube be supplied to?
- Outside diameter and wall tolerances depend on the product standard and the manufacturing route. State the tolerance class you need and we confirm whether it can be supplied.
- Which standard applies to SS 304 tube?
- SS 304 tube is commonly specified to ASTM A213 / ASME SA-213, ASTM A269 and ASTM A249. Confirm the standard and edition on your order.
- What is the minimum yield and tensile strength of SS 304?
- In the annealed condition, SS 304 has a minimum yield strength of 205 MPa and a minimum tensile strength of 515 MPa, per the standard named in the table above.
- What is the UNS number and EN designation of SS 304?
- Stainless Steel 304 is designated UNS S30400, EN 1.4301, AISI 304 and JIS SUS 304.
- What are the main alloying elements in SS 304?
- To the standard in the composition table, SS 304 carries chromium 17.50 – 19.50 and nickel 8.00 – 10.50 percent by weight. Confirm the composition on the mill test certificate supplied with your material.
- Do you supply a mill test certificate with SS 304 tube?
- Yes, to EN 10204 3.1 as standard, showing chemistry and mechanical properties against the heat. EN 10204 3.2 with third-party inspection is available on request.
Grade
Products
Compare
Export
Industries
Guides
Send us the specification.
Grade, dimensions, quantity and standard. We will come back with availability and price.