ASTM A268 TP410, TP430, TP439 Stainless Steel Tubing
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What is ASTM A268?
ASTM A268 is the standard specification for seamless and welded ferritic and martensitic stainless steel pipe for general service.
The pipe shall be manufactured by the seamless or welded process, reheated to 1200°F [650°C] or higher, and then cooled to conform to the requirements of this specification. Designations include TP410, TP405, TP420, TP430, TP430Ti, TP403, TP409, TP444, TP439, and TP446. This standard covers welded ferritic and martensitic stainless steel pipe in various nominal wall thicknesses for general corrosion-resistant and high-temperature service.
ASTM A268 TP410, TP430, TP439 Stainless Steel Tubing Manufacturers, Suppliers
GNEE provides ASTM A268 TP410, TP430, and TP439 ferritic stainless steel tubes manufactured with direct quenching and polishing processes that enhance surface smoothness (Ra ≤ 0.8μm) and corrosion resistance in mild to moderate environments; available in standard sizes of outer diameter 6.35-114.3mm and wall thickness 0.8-2.0mm with strict tolerances (outer diameter ±0.05mm, wall thickness ±0.03mm), suitable for applications such as automotive exhaust systems, kitchenware, and industrial furnaces requiring cost-effective corrosion resistance and moderate temperature performance, and supports customized cutting and bending with complete material certification including mill test reports and surface quality inspection documents.
ASTM A268 Stainless Steel Tubing Specification
| Standard | ASTM A268, ASME SA268 |
|---|---|
| Tube Type | Both Welded And Seamless |
| Grades | ASTM A268 TP 410, ASTM A268 TP 430, ASTM A268 TP 439 |
| Outside Diameter | 1/4″ (6.25mm) To 8″ (203mm) |
| Wall Thickness | 0.02″ (0.5mm) To 0.5″(12mm) |
| Application | Heat Exchanger, Heater, Condenser |
Chemical Composition of ASTM A268 Stainless Steel Tubing
| Grade | C (max, %) | Si (max, %) | Mn (max, %) | P (max, %) | S (max, %) | Cr (%) | Ni (%) | Mo (%) | N (%) | Ti / Nb (%) |
|---|---|---|---|---|---|---|---|---|---|---|
| TP410 | 0.08–0.15 | ≤1.00 | ≤1.00 | ≤0.040 | ≤0.030 | 11.5–13.5 | ≤0.75 | – | – | – |
| TP430 | ≤0.12 | ≤1.00 | ≤1.00 | ≤0.040 | ≤0.030 | 16.0–18.0 | ≤0.75 | – | – | – |
| TP439 | ≤0.03 | ≤1.00 | ≤1.00 | ≤0.040 | ≤0.030 | 17.0–19.0 | ≤0.50 | – | ≤0.030 | Ti stabilized (≥5×C, ≤0.75) |
ASTM A268 Stainless Steel Tubing Sizes Tolerance
Variations in outside diameter, wall thickness, and length from those specified shall not exceed the amounts prescribed below.
| Outside Diameter, In.[Mm] | OD Tolerance, In.[Mm] | Wall Thickness, % | Thin Wall Tubes |
|---|---|---|---|
| Up To1⁄2, [12.7], Excl | ±0.005 [0.13] | ±15 | |
| 1⁄2 To 11⁄2 [12.7 To 38.1], Excl/Td> | ±0.005 [0.13] | ±10< | Less Than 0.065 In. [1.6 Mm] Nominal |
| 11⁄2 To 31⁄2 [38.1 To 88.9], Excl | ±0.010 [0.25] | ±10 | Less Than 0.095 In. [2.4 Mm] Nominal |
| 31⁄2 To 51⁄2 [88.9 To 139.7], Excl | ±0.015 [0.38] | ±10 | Less Than 0.150 In. [3.8 Mm] Nominal |
| 51⁄2 To 8 [139.7 To 203.2], Incl | ±0.030 [0.76] | ±10 | Less Than 0.150 In. [3.8 Mm] Nominal |
TP410, TP430 And TP439 Properties
The steel shall conform to the following tensile properties: tensile strength, yield strength, and elongation.
| Grade | Tensile Strength, Min, Ksi [MPa] | Yield Strength, Min, Ksi [MPa] | ELONGATION. MIN, % |
|---|---|---|---|
| TP410 | 55 [380] | 30 [205] | 20 |
| TP430 | 60 [415] | 35 [240] | 20 |
| TP439 | 60 [415] | 30 [205] | 20 |
ASTM A268 TP410, TP430, TP439 Stainless Steel Tubing Price per Ton
The price per ton of ASTM A268 TP410, TP430, and TP439 stainless steel tubing depends on factors such as raw material costs (nickel and chromium content), size and wall thickness, surface finish, order quantity, and international market demand.
If you have a project need, we welcome your order. GNEE has a large inventory of popular products for you to choose from. They can be processed into a variety of practical product forms, including seamless and welded. For detailed chemical composition and free samples, please contact our factory today. We offer competitive pricing and excellent service.Email: info@gneestainless.com
