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Stainless steel grades
Enquire for SS 316 pipe and tubing for your project. Send the product standard, grade, size, quantity and delivery location.
Request a quoteTechnical reference
| Field | Order reference |
|---|---|
| Standard | A312 TP316 pipe or A269 TP316 tubing where specified |
| Product or route | Molybdenum-bearing austenitic stainless, UNS S31600 |
| Critical dimensions and fit | Define the line standard, end preparation and permissible route |
| Supply enquiry | Confirm sizes, lengths, route, documentation and lead time for your order |
Selected ASME B36.19 dimensions. Schedule columns give nominal wall thickness. Theoretical inside diameter and mass use nominal dimensions, with a reference density of 8,000 kg/m³. Actual mass varies by grade and tolerances.
| NPS | OD (mm) | 10S wall (mm) | 40S wall (mm) | 80S wall (mm) | 40S ID (mm) | 40S kg/m |
|---|---|---|---|---|---|---|
| 1 | 33.40 | 2.77 | 3.38 | 4.55 | 26.64 | 2.55 |
| 2 | 60.33 | 2.77 | 3.91 | 5.54 | 52.51 | 5.54 |
| 3 | 88.90 | 3.05 | 5.49 | 7.62 | 77.92 | 11.51 |
| 4 | 114.30 | 3.05 | 6.02 | 8.56 | 102.26 | 16.38 |
| 6 | 168.28 | 3.40 | 7.11 | 10.97 | 154.06 | 28.80 |
Reference ASME B36.19 dimensional standard · Tonkin stainless pipe dimensional chart
For tubing, order by actual outside diameter and wall. Drawing example: NPS 3 Sch 40S pipe or 12 × 1 mm instrument tube.
Use the approved design code and service conditions. The applicable rating depends on material, temperature, minimum effective wall, joint details and the limits of the connected assembly. A schedule or a hydrostatic test result alone cannot establish an operating pressure.
Reference ASME process piping code B31.3
Selected chemistry by mass for the A312 pipe designations below. The ordered edition, full element limits and any applicable notes govern acceptance. A dash means the value is omitted here.
| Grade | UNS | C (%) | Cr (%) | Mo (%) | Grade feature |
|---|---|---|---|---|---|
| TP316 | S31600 | ≤0.08 | 16–18 | 2–3 | Molybdenum-bearing grade |
Reference ASTM A312/A312M scope · Centravis tubular product catalogue · Alleima high-temperature tubular grades
Selected minimum room-temperature tensile and yield strengths for A312 pipe. Elongation acceptance depends on the specimen orientation and applicable thickness basis. For tube orders, apply the nominated tube specification.
| Grade | Tensile minimum (MPa) | Yield minimum (MPa) |
|---|---|---|
| TP316 | 515 | 205 |
Reference ASTM A312/A312M scope · CTS A312 technical reference · Tioga A312 pipe grade reference
Check the grade on the MTC and any specified product analysis.
| When | What to check |
|---|---|
| Before ordering | Document the required test method, edition and any witness points |
| At delivery | Match the material report and heat or lot identification to the shipment |
316L for orders that specifically require the low-carbon grade.
For the enquiry, define the line standard, end preparation and permissible route.
A312 TP316 pipe or A269 TP316 tubing where specified · NPS 3 Sch 40S pipe or 12 × 1 mm instrument tube. Add quantity, lengths, delivery city and the required reports.
Ordering guidance
If your drawing calls for 316, keep the grade explicit and identify whether you need pipe or tube. For A312 pipe, give the nominal pipe size and schedule. For tubing, give the actual OD and wall thickness and the nominated tube standard.
If an alternative is offered as 316L or 316/316L, compare the certificate and product specification with the purchase order. Do not infer acceptable service conditions from the grade designation alone; follow the project material selection.
Check pricing and availability →
Buyer’s guide
316 (UNS S31600) is an austenitic stainless grade alloyed with molybdenum. It is often evaluated where 304 provides insufficient resistance to localised corrosion. Actual service depends on chemistry, temperature, deposits and crevices at joints or under supports. Give the project team’s approved grade and line class when requesting a commercial quotation.
For a process spool, ask for the pipe standard, NPS, schedule or specified wall and end preparation. For compression connections, copy the actual OD and wall from the tube and fitting schedule. If a quote uses both a nominal pipe dimension and an actual tube dimension, ask the supplier to split them into different line items.
316L is the low-carbon member of the family. Where procurement permits a 316/316L offer, confirm both claimed designations and the applicable product standard against the certificate. If you are replacing one section in an existing line, include the previous material report and the required matching joint geometry.
A skid builder may need TP316 pipe for a manifold and TP316 instrument tube for take-offs. Record the pipe schedule, then list tube OD, wall, length and fitting system separately even if both have the same delivery date.
Use the approved material selection. Salt exposure, cleaning frequency and crevices can affect suitability, and site location alone does not define the corrosive conditions.
Technical references Outokumpu grade reference · ASTM steel standards directory
Prepare your enquiry
| Item | What to send |
|---|---|
| Product details | 316 or TP316 · product standard · NPS or OD · wall · length · route |
| Delivery | Quantity with units, delivery city and required date if known |
| Acceptance | Required certificates and inspection scope; attach the drawing revision where applicable |
UNS S31600 — Molybdenum-alloyed austenitic stainless steel.
Size, route, quantity, finish and tests can change the offer. Ask each supplier to quote against the same line items and delivery basis.
Technical reference: Grade designation reference
Project enquiries
Send your dimensions, quantities and delivery city. Include any inspection or material certificate requirements so they can be quoted against the same line items.
Request a quote → Call +91 99204 92715