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Stainless steel grades
Compare SS 310 and 310S pipe and tube enquiries. Specify the exact grade, standard, dimensions and documentation needed.
Request a quoteTechnical reference
| Field | Order reference |
|---|---|
| Standard | A312 TP310S pipe where specified. Verify the tubular specification separately for an order calling for 310 |
| Product or route | Chromium-nickel heat-resisting austenitic family |
| Critical dimensions and fit | Keep 310 and 310S as separate material callouts and state the furnace part geometry |
| 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: 50.8 × 3 mm furnace tube drawing example.
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 |
|---|---|---|---|---|---|
| TP310S | S31008 | ≤0.08 | 24–26 | — | High chromium and nickel |
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) |
|---|---|---|
| TP310S | 515 | 205 |
Reference ASTM A312/A312M scope · CTS A312 technical reference · Tioga A312 pipe grade reference
Confirm grade, standard and delivery condition on the certificate.
| 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 |
310S and 310H have distinct UNS designations.
For the enquiry, keep 310 and 310S as separate material callouts and state the furnace part geometry.
A312 TP310S pipe where specified. Verify the tubular specification separately for an order calling for 310 · 50.8 × 3 mm furnace tube drawing example. Add quantity, lengths, delivery city and the required reports.
Ordering guidance
Use this page to compare ordering requirements, then specify 310 or 310S exactly as called out. Ask for the product specification, grade and manufacturing route on separate quote lines if both are permitted.
For elevated-temperature service, send the equipment specification and the required testing or documents. Selection depends on the applicable design code and service conditions; the material name is not a design limit.
Check pricing and availability →
Buyer’s guide
310 and 310S are chromium-nickel heat-resisting austenitic grades. 310S is the lower-carbon variant. The grade choice belongs to the equipment specification because gas chemistry, load and exposure cycle can affect the selection. Keep 310 and 310S as distinct line items if the project allows more than one offer.
A radiant tube, a furnace instrument sheath and hot-gas pipework can require different product forms and acceptance requirements. Provide the drawing and indicate whether you need finished straight lengths, hollow stock for fabrication or a formed component. Give OD and wall for tubing or NPS and schedule for pipe, plus any restrictions on the manufacturing route.
For a furnace replacement, check measured mating dimensions against the original drawing, then agree which governs the order. Include any requirements for straightness, length, end machining, material reports or heat transfer markings. If the equipment is cycled or exposed to a particular atmosphere, pass that information to the project authority with any proposed alternate.
For a furnace maintenance order, attach the material callout, tube OD, wall and cut length, then label the needed end preparation. Mark the date the part must reach the site so delivery can be assessed separately from material compliance.
Use the design basis for the component. Environment, mechanical loading and exposure time affect the applicable limits.
Technical references Outokumpu grade reference · Alleima high-temperature tube grades
Prepare your enquiry
| Item | What to send |
|---|---|
| Product details | 310 or 310S · standard · dimensions · route · inspection requirements |
| Delivery | Quantity with units, delivery city and required date if known |
| Acceptance | Required certificates and inspection scope; attach the drawing revision where applicable |
UNS S31008 (310S) — 310S is a heat-resisting austenitic grade. State which 310-series grade the drawing specifies.
Compare the precise grade, specification edition, wall, length, manufacturing route and test scope before comparing price.
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