439 Stainless Tubing Exhaust Pipe 439 Stainless Steel Properties 439 Stainless Steel Tubing
Description
Type 439 is an 18% chromium, titanium stabilized ferritic stainless steel with corrosion resistance similar to that of 304/304L stainless steel. This grade may be used in the annealed, cold formed or as-welded condition in applications where other stainless steels such as Type 304/304L and Type 430 are used. Type 439 has good weldability due to titanium stabilization and has excellent resistance to stress corrosion cracking. Type 439 outperforms Type 409 in both oxidation and corrosion resistance and typical applications include tubular manifolds and exhaust system components.
Stainless Steel 439 Tubes Specifications:
| Specifications | ASTM A/ASME SA268/A731 CL |
| Grades | TP 439 Stainless Steel Tubes / UNS S43035 / DIN 1.4510 |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Wall Thickness | Sch 5s, 10s, 40s, 80s, 160, XXS |
| Size | 1/2″NB - 24″NB |
| Form | Round, Square, Rectangular, Hydraulic Etc |
| Types | Seamless / ERW / Welded / Fabricated / LSAW Tubes |
| End | Plain End, Beveled End, Treaded |
| Length | Single Random, Double Random & Cut Length. (Custom Sizes Available as per customers requirement) |
Grades of Stainless Steel 439 Tubes
| STANDARD | UNS | WERKSTOFF NR. |
| SS 439 | S43035 | 1.4510 |
Chemical Composition
Chemical Composition (wt%) limits as specified in ASTM A240 and ASME SA240*
| Element | 439 |
| Carbon | 0.030 |
| Chromium | 17.0-19.0 |
| Nickel | 0.50 |
| Manganese | 1.00 |
| Silicon | 1.00 |
| Nitrogen | 0.030 |
| Phosphorus | 0.040 |
| Sulfur | 0.030 |
| Aluminum | 0.15 |
| Titanium | 0.20 +4(C+N) min
1.10 max |
* Maximum, unless range is indicated
Mechanical Properties
Mechanical property requirements for annealed product as specified in ASTM A240 and ASME SA240
| Property | 439 |
| Yield Strength, min. (ksi) | 30 |
| Tensile Strength, min. (ksi) | 60 |
| Elongation, min. (%) | 22 |
| Hardness, max. (Rb) | 89 |
