Stainless Steel 316L Pipe: manufacturer, stockist and exporter in Mumbai, India
Rajgranth Metal & Alloys supplies stainless steel 316l pipe (UNS S31603) from Mumbai and exports it to 18 markets.
What is SS 316L pipe?
Pipe is sized by nominal bore and schedule and is made to carry fluid or to act as structural section. SS 316L pipe is supplied welded or seamless depending on the duty: welded for general and larger-diameter lines, seamless where there must be no weld seam or the design code requires it. 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 |
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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 pipe: sizes and finishes
The published size range, finishes and conditions for pipe are set out on the seamless pipes and welded pipes 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 Pipes: Outside diameter | 10.3 to 609.6 (mm) |
| Seamless Pipes: Nominal bore | 1/8″ NB, 40″ NB (1/4″ to 24″ held as primary stock range) |
| Seamless Pipes: Schedule | SCH 5 to SCH XXS |
| Seamless Pipes: Wall thickness | 0.71 to 8.0 (SWG, mm) |
| Seamless Pipes: Length | 5 m, 6.5 m (Customised up to 12 m per requirement) |
| Seamless Pipes: Pipe ends | Plain, Bevelled |
| Seamless Pipes: Marking | Size, Grade, Specification, Heat number |
| Welded Pipes: Outside diameter | 10.3 to 609.6 (mm) |
| Welded Pipes: Schedule | SCH 5 to SCH XXS |
| Welded Pipes: Wall thickness | 0.71 to 8.0 (SWG, mm) |
| Welded Pipes: Length | 5 m, 6.5 m (Customised up to 12 m per requirement) |
| Welded Pipes: Pipe ends | Plain, Bevelled |
Scroll the table horizontally to see all columns.
Standards for SS 316L pipe
SS 316L pipe is commonly specified to ASTM A312 / ASME SA-312, ASTM A358 and ASTM A269. 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 pipe
Chloride resistance from molybdenum
No post-weld anneal needed to avoid intergranular attack
Standard grade for sanitary and pharmaceutical equipment
Where SS 316L pipe 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 pipe
- Nominal bore and schedule, or outside diameter and wall thickness
- Seamless or welded
- Length, with 5 m to 6.5 m the published stock range and longer to order
- End condition: plain or bevelled
- Surface condition: annealed and pickled, bright annealed or polished
- The standard, and the test certificate required
What to check on SS 316L pipe before and after delivery
On SS 316L pipe check the wall thickness against the schedule, the end preparation, and the heat number against the mill test certificate. For welded pipe, ask whether the weld seam has been dressed if the pipe is for exposed or polished use. Confirm that the pressure rating and design code your line is built to accept the grade and the pipe standard. Grade limits to design around: slightly lower strength than 316 and not for sustained seawater or hot chloride service.
Export of SS 316L pipe from India
SS 316L pipe 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 pipe 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 is the difference between SS 316L pipe and tube?
- Pipe is specified by nominal bore and schedule, which fixes the wall for each size. Tube is specified by actual outside diameter and wall thickness. If you have an outside diameter and a wall, you are normally buying tube.
- Which standard applies to SS 316L pipe?
- SS 316L pipe is commonly specified to ASTM A312 / ASME SA-312, ASTM A358 and ASTM A269. 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 pipe?
- 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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