TP316L Seamless Stainless Steel Tube

Available Sizes and Ordering Options

This page keeps two things apart on purpose: the overall sourcing range (what the mill can be asked to make) and the confirmed combination for your order (standard × OD × wall × length × manufacturing condition). The tables below state the first; the written quotation fixes the second.

Supply combinations by outside diameter — what we can make

This is a capability table, not a stock list; no inventory is published against it. Wall figures give the range we can draw or roll for that OD band — the ordered wall is always stated with its basis (minimum or average). For 225–257 mm OD the A1016 dimensional tables do not apply; the tolerance basis is agreed in writing before the order is accepted (see the dimensional section).

Ordering options and delivery condition

Sizes outside the ranges above are quoted against inquiry. Where a design code or owner specification fixes the wall basis, quote that requirement verbatim in the RFQ — quotations are written to the same basis.

Ordering Standards: ASTM A213 vs ASTM A269

Two tubing specifications cover this grade, and the edition matters as much as the number — the values on this page follow ASTM A213/A213M-24. Ordering under the right specification, and the right edition, avoids re-quoting and re-testing later:

ASTM A312 is the pipe specification and is not an alternative for this tubing page. For the same grade in pipe form and larger sizes, see the TP316L seamless pipe page.

Chemical Composition (ASTM A213 Heat-Analysis Limits)

Limits below are heat-analysis acceptance values from ASTM A213/A213M-24, Table 2 (TP316L row). Where a product (check) analysis is ordered, the permitted deviations from these heat values follow A1016:

Carbon limit: ASTM A213 sets 0.035% max for TP316L. Some purchase specifications — and the EN designation 1.4404 as commonly written — call for ≤ 0.030%. State the limit your specification requires in the RFQ; the delivered MTC records the actual heat value either way.

Grade correspondence does not make the delivery requirements of ASTM, EN, JIS and GB interchangeable — chemistry, heat treatment, dimensions, testing and certification follow the specification named on the purchase order.

Mechanical Properties and Physical Data

Acceptance limits — ASTM A213/A213M-24, Table 3

Test conditions: room temperature, longitudinal test piece, yield at 0.2% offset, elongation measured in 50 mm; sampling and methods per A213 Section 9 (A370 / A1058). These are the values the certificate must meet:

Typical physical properties — reference values, not acceptance criteria

Permissible Variations in Dimensions (ASTM A1016)

Tolerances apply only when the order cites ASTM A1016/A1016M-24a (general requirements). Each table below states its standard, edition, size range and wall basis. Where the product specification or the purchase order states different values, the order governs.

Outside diameter — cold-finished seamless (A1016-24a, Table 1)

Size range covered: up to 225 mm OD. Wall basis does not affect this table. Each band reads: over the lower figure, up to and including the upper figure.

Outside diameter — hot-finished seamless (A1016-24a, Table 1)

Size range covered: up to 225 mm OD; same band reading as above.

* A1016 Tables 1–2 stop at 225 mm OD. For 225–257 mm the tolerance basis is agreed in writing at quotation and repeated on the MTC; the 200–225 mm values must not be read across.

Wall thickness (% of specified wall) — A1016-24a, Table 2

Wall basis: the values are +/0, i.e. no minus variation is permitted, so they serve a minimum-wall order. Where average wall is ordered, the variation is symmetric around nominal and is stated in the quotation.

Cut length — A1016-24a, Table 3

For specific cut lengths, A1016 Table 3 permits +3 mm / 0 mm on cold-worked seamless tube below 50.8 mm OD, and +5 mm / 0 mm on cold-worked tube of 50.8 mm OD and above and on hot-worked tube, subject to the footnotes of that table. Length tolerance for random lengths is stated per order.

Values compiled from ASTM A1016/A1016M-24a, Tables 1–3. Table 1 covers OD and Table 2 wall; both stop at 225 mm OD, which is why 225–257 mm is quoted rather than tabulated. Wall values apply to the specified wall; where a minimum wall is ordered, the permitted variation is unidirectional as shown. Straightness and other general requirements are covered by the same standard — confirm the edition in force at order time.

Inspection, Testing and Mill Test Certificates

Inspection is split into three groups so that a purchaser can see what is included, what must be named in the purchase order, and what arrives as an extra document:

1. Required on every order

2. Methods that can be agreed — must be stated in the PO

3. Additional documents

The hydrostatic and the electric test are alternatives, not cumulative — the order names one. UT and ET in group 2 are additional examinations with their own report; they do not replace the A213 integrity test. Anything a buyer needs to hand to an inspector should be named in the PO, because items outside group 1 are not supplied by default.

Fields printed on the 3.1 certificate

Applications and Points to Confirm

Each application below lists the duty it fits and what should be confirmed before the order is placed — the items in the third column decide whether TP316L is the right pick:

Tell us the medium, temperature, pressure and chloride level, and we will confirm the grade — or propose the next one up where the chloride margin is thin.

Grade Selection: TP304L vs TP316L vs TP316

PREN (pitting resistance equivalent number) is indicative only and follows from the composition ranges above; it is not an acceptance value.

Frequently Asked Questions

Related Product Forms and Grades

Other forms and neighbouring grades, each with its own product specification — confirm the applicable standard for every order:

• TP316L Seamless Stainless Steel Pipe — UNS S31603 · ASTM A312 — same grade in pipe form
• TP316 Seamless Stainless Steel Tube — UNS S31600 · ASTM A213 — higher carbon, higher strength
• TP304L Seamless Stainless Steel Tube — UNS S30403 · ASTM A213 — molybdenum-free, lower cost
• TP321 Seamless Stainless Steel Tube — UNS S32100 · ASTM A213 — titanium-stabilised for high temperature
• TP317L Seamless Stainless Steel Tube — UNS S31703 · ASTM A213 — higher Mo for stronger chloride duty