Basic Ferritic Steels
X2CrTi12 – 1.4512 / S40900 / SUS409L / Z3CT12 / 409S
X2CrTi12 – 1.4512 stainless steel belongs to the group of ferritic stainless steels and is widely used due to its cost-effectiveness combined with adequate corrosion resistance. Commonly known as 409L, this grade has a relatively low chromium content, but its performance is enhanced through titanium (Ti) stabilization. This makes it particularly suitable for applications such as automotive exhaust systems and heat-exposed components.
The chemical composition typically includes approximately 10.5–12.5% chromium. Chromium forms a thin protective oxide layer on the surface, providing a basic level of corrosion resistance. Titanium binds with carbon, preventing intergranular corrosion and improving structural stability after welding. This results in extended service life and improved reliability of welded components.
One of the key advantages of X2CrTi12 stainless steel is its resistance to elevated temperatures and good thermal stability. This makes it ideal for applications exposed to continuous heat, such as exhaust systems. Additionally, due to its ferritic structure, it has a lower coefficient of thermal expansion compared to austenitic steels, reducing the risk of deformation under temperature fluctuations.
From a mechanical standpoint, this grade offers moderate strength and limited ductility. Its formability is sufficient, particularly in sheet form, allowing it to be easily processed. Its weldability is relatively good among ferritic steels, thanks to the titanium stabilization.
In terms of corrosion resistance, it is lower than that of austenitic stainless steels, but it performs adequately in atmospheric and mildly corrosive environments. However, its use is limited in marine or highly aggressive chemical environments.
Overall, X2CrTi12 – 1.4512 (409L) stainless steel provides a practical and economical solution, especially in automotive and industrial applications where heat resistance and cost efficiency are key factors.
Main Application Areas
- Automotive exhaust systems
- Mufflers and exhaust pipes
- Heat-exposed metal components
- Industrial furnace parts
- White goods and kitchen equipment
- Sheet, pipe, and profile production
- Light structural components
- Agricultural machinery parts
- Welded metal structures
Thanks to these properties, X2CrTi12 – 1.4512 (409L) stainless steel is widely preferred as a cost-effective and durable engineering material, particularly in the automotive industry.
General Identity
X2CrTi12 – 1.4512
| Grade |
X2CrTi12 |
| Number |
1.4512 |
| Classification |
Ferritic Stainless Steel |
Equivalent Grades
X2CrTi12 – 1.4512
| EU – EN |
X2CrTi12 |
| USA |
409
S40900 |
| France, AFNOR |
Z3CT12 |
| England, BS |
409S |
| Japan, JIS |
SUS409L |
Standards
X2CrTi12 – 1.4512
| Standard 1 |
EN 10088-2: 2005 |
| Standard 2 |
EN 10296-2: 2005 |
| Standard 3 |
EN 10297-2: 2005 |
| Standard 4 |
EN 10088-1: 2005 |
| Standard 5 |
EN 10088-4: 2009 |
Chemical Composition
X2CrTi12 – 1.4512
| C |
max 0.03 |
| Si |
max 1.00 |
| Mn |
max 1.00 |
| P |
max 0.040 |
| S |
max 0.015 |
| Cr |
10.5 – 12.5 |
| Ti |
0.65 |
Mechanical Properties
X2CrTi12 – 1.4512
| Rm – Tensile strength (MPa) (+A) |
380 – 560 |
| Rp0.2 0.2% proof strength (MPa) (+A) |
210 |
| A – Min. elongation at fracture (%) (+A) |
25 |
