ASTM A249 TP304L TP316L Stainless Steel Welded Tubing
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What is ASTM A249 standard?
ASTM A249 specification covers nominal-wall-thickness welded tubes and heavily cold worked welded tubes made from the austenitic steels. More specifically, the ASTM A249 specification is intended for uses such as boiler,superheater,heat exchanger,condenser tubes.
GNEE is a well-known supplier of ASTM A249 TP316 pipes, offering a wide variety of shapes and sizes at factory direct prices.
GNEE supplies ASTM A249 TP304L / TP316L stainless steel welded tubes, which are precision-manufactured thin-walled welded pipes using Tungsten Inert Gas (TIG) or plasma welding processes, followed by bright annealing or acid pickling treatments. These tubes are produced in strict compliance with the international standards ASTM A249 / ASME SA249, with wall thicknesses ranging from 0.5–3.0 mm. They are suitable for applications with stringent requirements for corrosion resistance and cleanliness, such as high-precision fluid conveyance, food and beverage processing pipelines, chemical heat exchanger connections, and structural support components.
Chemical Composition:
|
Elements |
304L(wt%) |
316L (wt%) |
|
(C) Carbon, max |
0.035 |
0.035 |
|
(Mn) Manganese, max |
2.00 |
2.00 |
|
(P) Phosphorus, max |
0.040 |
0.040 |
|
(S) Sulfur, max |
0.030 |
0.030 |
|
(Si) Silicon, max |
0.75 |
0.75 |
|
(Ni) Nickel |
8.0 - 13.0 |
10.0 - 15.0 |
|
(Cr) Chromium |
18.0 - 20.0 |
16.0 - 18.0 |
|
(Mo) Molybdenum |
N/A |
2.0 - 3.0 |
|
(Fe) Iron |
Bal. |
Bal. |
|
(Cu) Copper |
N/A |
N/A |
|
(N) Nitrogen |
N/A |
N/A |
Mechanical Properties Of ASTM A249 Grade 316L Tube
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| TP304L | ≥ 520 MPa | ≥ 205 MPa | ≥ 40% | ≤ 200 HB |
| TP316L | ≥ 515 MPa | ≥ 205 MPa | ≥ 40% | ≤ 200 HB |
ASTM A249 TP316 Welded Tube Dimeter Tolerance
| NPS | OD Tolerance | |||
|---|---|---|---|---|
| + | – | |||
| mm | inch | mm | inch | |
| > 1 1 /2~4 | 0.8 | 1/32(0.031) | 0.8 | 1/32(0.031) |
| 1/8~1 1 /2 | 0.4 | 1/64(0.015) | 0.8 | 1/32(0.031) |
| > 8~18 | 2.4 | 3/32(0.093) | 0.8 | 1/32(0.031) |
| > 4~8 | 1.6 | 1/16(0.062) | 0.8 | 1/32(0.031) |
| > 26~34 | 4.0 | 5/32(0.156) | 0.8 | 1/32(0.031) |
| > 18~26 | 3.2 | 1/8(0.125) | 0.8 | 1/32(0.031) |
| > 34~48 | 4.8 | 3/16(0.187) | 0.8 | 1/32(0.031) |
Application Of SA 249 316 SS Heat Exchanger Tube
Chemical Processing,Heat Exchangers,Pharmaceutical Industry,Boilers,Petrochemical,Marine,Water Treatment Systems,Nuclear Power Plants.
Our ASTM A249 stainless steel pipes come with a factory warranty and third-party testing reports (such as eddy current testing, hydrostatic testing, chemical composition analysis, and corrosion testing) before shipment, ensuring that each welded pipe meets dimensional accuracy (OD tolerance ±0.10 mm, wall thickness tolerance ±10%).
All stainless steel pipes are moisture-proofed and securely packaged in wooden crates, pallets, or bubble wrap. They are transported in standard containers or dedicated vehicles to ensure the integrity and safety of the goods during transit. We offer global shipping, with a typical lead time of 7-15 days from production to delivery, ensuring on-time delivery to our customers.Email: info@gneestainless.com
