What is 1.4512 stainless steel?
EN 1.4512 is a titanium-stabilized ferritic stainless steel with a chromium content of approximately 11-12%. It belongs to the 400 series of stainless steels, similar to AISI 409 (UNS S40900). Its very low nickel content makes it magnetic and more economical than austenitic stainless steel grades like 304 or 316. This grade is widely used in applications requiring oxidation resistance and moderate corrosion resistance, such as automotive exhaust systems, industrial furnaces, and heat exchangers.
1.4512 Stainless Steel Equivalent Grades
| Standard | Equivalent Grade | Description |
|---|---|---|
| EN (Europe) | 1.4512 | Base designation |
| AISI / ASTM (USA) | Type 409 | Closest equivalent; ferritic stainless steel |
| UNS (Unified Numbering System) | S40900 | Chemical equivalent under ASTM standards |
| JIS (Japan) | SUS409L / SUS409 | Low-carbon version, improved corrosion resistance |
| GB (China) | 0Cr11Ti | Chinese equivalent with titanium stabilization |
| BS (UK) | 409S17 | British Standard equivalent |
1.4512 Stainless Steel Chemical Composition
| Element | Content (%) |
|---|---|
| C | ≤ 0.03 |
| Si | ≤ 1.00 |
| Mn | ≤ 1.00 |
| P | ≤ 0.04 |
| S | ≤ 0.015 |
| Cr | 10.5 – 12.5 |
| Ti | ≥ 6 × C – 0.75 |
| Ni | ≤ 0.75 |
Mechanical Properties of EN 1.4512 Stainless Steel
| Property | Typical Value |
|---|---|
| Tensile Strength | ≥ 380 MPa |
| Yield Strength | ≥ 170 MPa |
| Elongation (A50) | ≥ 20% |
| Hardness | ≤ 200 HB |
| Density | 7.75 g/cm³ |
What is 1.4512 stainless steel equivalent in ASTM standard?
The ASTM equivalent to the European standard 1.4512 stainless steel is ASTM 409. It is also designated as UNS S40900 or TP409 in some ASTM specifications, such as ASTM A268 and ASTM A240.
Is 1.4512 stainless steel magnetic?
Yes. 1.4512 stainless steel is magnetic because it is a ferritic stainless steel. Ferritic stainless steel is inherently magnetic due to its iron-like atomic structure, which contains a high concentration of chromium and little to no nickel. It remains highly magnetic before and after heat treatment.
Can 1.4512 stainless steel resist rust?
Yes, 1.4512 stainless steel resists rust, especially in high-temperature environments, but it is not completely immune to rust and its resistance is lower than austenitic stainless steels. Its resistance comes from a chromium content of at least 11%, with the addition of titanium or niobium stabilizing the steel and further enhancing its corrosion and oxidation resistance, making it ideal for applications like automotive exhaust systems.
What's the hardness of 1.4512 material?
The hardness of 1.4512 material is typically ≤ 180 HB (Brinell Hardness) in an annealed or soft condition. Some sources may list a slightly higher maximum of ≤ 200 HB.
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