what is ss 409 equivalent material?
Leave a message
If you're sourcing SS 409 stainless steel and wondering about its international equivalents, this guide helps you understand its composition, equivalents, and why it's widely used in automotive exhaust and heat-resistant applications. Gnee supplies high-quality 409 stainless steel sheets, coils, and pipes that meet global standards like ASTM, EN, JIS, and DIN, ensuring reliable performance and durability.
What Is SS 409 Stainless Steel?
SS 409 is a ferritic stainless steel containing 11–12% chromium and small amounts of titanium, offering excellent oxidation resistance, good formability, and moderate corrosion resistance. It is mainly used for automotive exhaust systems, mufflers, catalytic converters, and heat exchangers, where strength and temperature resistance are required at an economical cost.
what is ss 409 equivalent material?
SS 409 equivalents include UNS S40900, EN 1.4512 (also known as X2CrTi12), and JIS SUS409. Other equivalent designations may exist depending on the specific standard or application, such as ASTM A240 Type 409 for sheets and plates, and various specifications for tubing like ASTM A268 TP409.
Equivalent grade comparisons for 409 stainless steel are given in table
| Grade | UNS | BS | BS | EN | EN | Swedish | Japanese |
| – | No. | EN | Name | SS | JIS | ||
| 409 | S40900 | 409S19 | – | 1.4512 | X6CrTi12 | – | SUH 409 |
Chemical Composition of 409 Stainless Steel
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.03 |
| Chromium (Cr) | 10.5 – 11.7 |
| Nickel (Ni) | ≤ 0.5 |
| Titanium (Ti) | ≥ 6 × C% and ≤ 0.75 |
| Manganese (Mn) | ≤ 1.0 |
| Silicon (Si) | ≤ 1.0 |
| Sulfur (S) | ≤ 0.015 |
| Phosphorus (P) | ≤ 0.04 |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 380 MPa |
| Yield Strength | ≥ 170 MPa |
| Elongation | ≥ 20% |
| Hardness (HB) | ≤ 200 |
| Density | 7.75 g/cm³ |
| Melting Point | 1480 °C |
Is SS 409 the same as 1.4512 stainless steel?
Yes.Yes, SS 409 and 1.4512 are the same material, as 1.4512 is the European (EN) designation and SS 409 is the American (AISI) designation for the same ferritic stainless steel. They are also known by the UNS number S40900 and the EN chemical designation X2CrTi12.
Can 409 replace 304 in exhaust systems?
In most automotive exhaust applications, yes - 409 provides sufficient corrosion and heat resistance at a much lower cost.
What is the difference between 409 and 409L?
The main difference is that 409L is the low-carbon version of 409 stainless steel, which improves its weldability and corrosion resistance, especially in welded areas. While both are titanium-stabilized ferritic stainless steels used in similar applications like automotive exhaust systems, 409L is better suited for projects requiring extensive welding because the lower carbon content minimizes the risk of sensitization and intergranular corrosion.
Does 409 stainless steel rust?
It may show light surface oxidation over time but maintains strong resistance to structural corrosion.
If you have a project need for 409 stainless steel, we welcome your order. GNEE has a large inventory of popular products for you to choose from. We process them into a variety of practical product forms, including sheet, coil, tube, bar, and wire. For detailed chemical composition and free samples, please contact our factory today. We offer competitive pricing and excellent service.Email: info@gneestainless.com
