Stainless Steel 316L Tube: manufacturer, stockist and exporter in Mumbai, India
Rajgranth Metal & Alloys supplies stainless steel 316l tube (UNS S31603) from Mumbai and exports it to 18 markets.
What is SS 316L 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 316L tube is bought for heat exchangers, instrumentation, process lines and structural and decorative work. SS 316L (UNS S31603, EN 1.4404) is the low-carbon version of 316 with 0.030 percent carbon at most. It has the molybdenum-bearing chloride resistance of 316, and the low carbon keeps welded joints from sensitising, so it is the standard choice for welded pipe, vessels and pharmaceutical and food equipment.
Rajgranth Metal & Alloys lists SS 316L among the grades it supplies and exports from Mumbai.
SS 316L designations and equivalents
| Standard | Designation |
|---|---|
| UNS | S31603 |
| EN / Werkstoff | 1.4404 |
| AISI | 316L |
| JIS | SUS 316L |
Scroll the table horizontally to see all columns.
SS 316L 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 | Molybdenum | Nitrogen |
|---|---|---|---|---|---|---|---|---|---|
| Limit | 0.030 max | 2.00 max | 0.75 max | 0.045 max | 0.030 max | 16.00 – 18.00 | 10.00 – 14.00 | 2.00 – 3.00 | 0.10 max |
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SS 316L mechanical properties
| Property | Requirement |
|---|---|
| Tensile strength | 485 MPa minimum |
| Yield strength (0.2% offset) | 170 MPa minimum |
| Elongation in 50 mm | 40% minimum |
| Hardness | 95 HRB maximum (217 HBW) |
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SS 316L 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 316L tube
SS 316L 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 316L tube
Chloride resistance from molybdenum
No post-weld anneal needed to avoid intergranular attack
Standard grade for sanitary and pharmaceutical equipment
Where SS 316L tube is used
- Welded process pipe and tube
- Pharmaceutical and biotech equipment
- Food and beverage processing
- Marine and coastal fittings
- Chemical tanks and vessels
What to state when you enquire for SS 316L 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 316L tube before and after delivery
On SS 316L 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: slightly lower strength than 316 and not for sustained seawater or hot chloride service.
Export of SS 316L tube from India
SS 316L tube is exported from Mumbai to 18 confirmed markets, quoted with the Incoterm and named port.
SS 316L compared with similar grades
Buyers who look at SS 316L tube usually also compare SS 316, SS 304L and SS 904L. 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
- Is 316L better than 316?
- For welded parts, yes, because the lower carbon protects the weld zone. For unwelded parts the difference is small, and 316L has a slightly lower minimum yield strength.
- Is 316L used for pharmaceutical equipment?
- Yes, it is the usual choice for product-contact surfaces. Confirm the surface finish and traceability your quality system requires.
- What is the difference between 316L and 904L?
- 904L has more nickel, molybdenum and copper, giving it much better resistance to sulphuric acid and chloride pitting, at a higher price.
- What tolerance can SS 316L 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 316L tube?
- SS 316L 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 316L?
- In the annealed condition, SS 316L has a minimum yield strength of 170 MPa and a minimum tensile strength of 485 MPa, per the standard named in the table above.
- What is the UNS number and EN designation of SS 316L?
- Stainless Steel 316L is designated UNS S31603, EN 1.4404, AISI 316L and JIS SUS 316L.
- What are the main alloying elements in SS 316L?
- To the standard in the composition table, SS 316L carries chromium 16.00 – 18.00, nickel 10.00 – 14.00 and molybdenum 2.00 – 3.00 percent by weight. Confirm the composition on the mill test certificate supplied with your material.
- Do you supply a mill test certificate with SS 316L 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.
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