What is the difference between 1.4404 and 1.4435?
Leave a message
If you are looking for high-performance stainless steel for corrosive environments, especially in the chemical, pharmaceutical, or food-processing industries, you've probably come across 1.4404 and 1.4435. While both belong to the austenitic stainless steel family and are similar to AISI 316L, there are key differences that could impact your material selection, cost, and long-term performance.
What Grade of Steel Is 1.4435?
1.4435 stainless steel is a low-carbon, molybdenum-alloyed austenitic stainless steel, classified under EN 10088. It is very close to AISI 316L, but with enhanced corrosion resistance. The key improvement lies in its higher nickel and molybdenum content, which provides superior performance in chloride-rich or aggressive chemical environments.
What is the equivalent material for 1.4435 stainless steel?
1.4435 stainless steel, also known as X2CrNiMo18-14-3, is equivalent to AISI 316L (or sometimes referred to as 316LMo). It's an austenitic stainless steel with a higher molybdenum content than standard 316L, giving it enhanced corrosion resistance, particularly in chloride-containing environments
What Is 1.4404 Grade Equivalent To?
1.4404 is the EN 10088-1 designation for AISI 316L, a widely used stainless steel known for its excellent corrosion resistance and weldability. It contains 2.0–2.5% molybdenum, which improves its pitting resistance compared to 304 stainless steel.
What is the difference between 1.4404 and 1.4435?
1.4435 stainless steel is an austenitic, highly corrosion resistant material. 1.4435 material has a higher content of chromium, nickel and molybdenum. Due to the effects of these elements, it is more corrosion resistant than the 316L (1.4404) grade. 1.4435 grade is not magnetic. 1.4435 stainless steel may be a very good alternative material if the 316L grade is not sufficient. 1.4435 material is often used in the petrochemical industry, the pharmaceutical industry, chemical production plants and the automotive industry. This grade is not a heat resistant grade and is not suitable for use at high temperatures.
Chemical Composition Comparison (% by weight)
| Element | 1.4404 (X2CrNiMo17-12-2) | 1.4435 (X2CrNiMo18-14-3) |
|---|---|---|
| Carbon (C) | ≤ 0.030 | ≤ 0.030 |
| Silicon (Si) | ≤ 1.00 | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 | ≤ 0.035 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.010 (lower sulfur) |
| Chromium (Cr) | 16.5 – 18.5 | 17.0 – 18.5 |
| Nickel (Ni) | 10.0 – 13.0 | 12.5 – 15.0 |
| Molybdenum (Mo) | 2.0 – 2.5 | 2.5 – 3.0 |
| Nitrogen (N) | ≤ 0.11 | ≤ 0.11 |
Note: 1.4435 has higher Ni & Mo content, offering better pitting resistance.
Mechanical Properties Comparison (at Room Temperature)
| Property | 1.4404 | 1.4435 |
|---|---|---|
| Tensile Strength (Rm) | 500 – 700 MPa | 500 – 700 MPa |
| Yield Strength (Rp0.2) | ≥ 200 MPa | ≥ 200 MPa |
| Elongation (A5, %) | ≥ 40% | ≥ 40% |
| Hardness (HBW) | ≤ 215 | ≤ 215 |
| Density | 8.00 g/cm³ | 8.00 g/cm³ |
| Pitting Resistance Equivalent (PREN) | ~24 | ~27 (higher resistance) |
What Is the Difference Between 1.4404 and 1.4432?
1.4432 is similar to 1.4404, but with slightly higher molybdenum content-typically at the upper end of the 316L range. It provides better corrosion resistance than 1.4404, but not as high as 1.4435. It is often used in Nordic or seawater environments due to its improved pitting resistance.
Why Choose GNEE for 1.4404 or 1.4435 Stainless Steel?
At GNEE, we supply both 1.4404 and 1.4435 stainless steel plates, sheets, tubes, and bars with:
✅ EN 10204 3.1/3.2 MTC Certification
✅ Fast delivery within 7–25 working days
✅ Customized sizes, cutting, polishing, and export-ready packaging
✅ ISO 9001 quality system, SGS/BV/TÜV inspection support
