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ASTM A268 Ferritic Stainless Steel Seamless / Welded 409 Tube
409 Tube:
409 stainless steel tube is especially useful for applications where oxidation or corrosion protection beyond the capacity of carbon steel and some coated steels is needed.
Current applications include automotive and truck exhaust systems, including tubular manifolds; agricultural spreaders, gas turbine exhaust silencers, and heat exchangers. It’s also useful for “difficult-to-form” hardware such as fuel fillers. 409 is a titanium stabilized ferritic stainless steel.
409 Tube Material Grade:
| Grade | – | C | Mn | Si | P | S | Cr | Ni | Ti |
| A268 409 | min. max. | – 0.08 | – 1.00 | – 1.00 | – 0.045 | – 0.030 | 10.5-11.7 | – 0.50 | 6C-0.75 |
409 Tube Specifications:
| Specifications | ASTM A268 |
| SS 409 Tubes Size | 20 (mm) – 219(mm) |
| Thickness | 1 (mm) to 20 (mm) |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Type | Seamless / ERW / Welded / Fabricated |
| Form | Round Tubes, Custom Tubes, Square Tubes, Rectangular Tubes, “U” Shape, Hydraulic Tubes |
| Length | Single Random, Double Random & Cut Length. |
| End | Plain End, Beveled End, Treaded |
409 Tube Corrosion Resistance:
Grade 409 resists atmospheric and exhaust gas corrosion. A light surface rust will form in most atmospheres; this rust retards further corrosion but makes the surface undesirable for decorative applications. The corrosion resistance is about the same as that of 3CR12 and the 12% chromium martensitic grades such as 410, and inferior to the 17% chromium grade 430.
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