stainless steel 1.4435 vs 1.4404
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What is 1.4435 stainless steel?
1.4435 stainless steel, also known as X2CrNiMo18-14-3 and 316LMo, is an acid-resistant austenitic chromium-nickel-molybdenum steel. It is a high-alloy version of 1.4404 (AISI 316L), containing approximately 18% chromium, 14% nickel, and at least 2.5% molybdenum. Due to the increased molybdenum content, this material exhibits significantly improved corrosion resistance compared to other chromium-nickel steels. Common product forms include plates, thick plates, seamless pipes, welded pipes, round bars, square bars, flat bars, cold-rolled strips, hot-rolled strips, and wires. It is widely used in the chemical, machinery, and construction industries.
What is 1.4404?
1.4404 material, also known as 316L stainless steel, is an austenitic stainless steel containing chromium, nickel, and molybdenum. The molybdenum content is typically around 2% to 2.5%, significantly improving its corrosion resistance. Its low carbon content makes it less prone to sensitization, making it ideal for thick-gauge welded components and widely used in industries such as chemical, petrochemical, food, and pharmaceutical.
Chemical Composition Comparison (EN 10088)
| Element | 1.4435 | 1.4404 (316L) |
|---|---|---|
| C | ≤ 0.03% | ≤ 0.03% |
| Cr | 17.0–18.0% | 16.5–18.0% |
| Ni | 12.5–15.5% | 10.0–13.0% |
| Mo | 2.5–3.0% | 2.0–2.5% |
| Mn | ≤ 2.0% | ≤ 2.0% |
| S | ≤ 0.015% | ≤ 0.03% |
| N | ≤ 0.11% | ≤ 0.11% |
Mechanical Properties
| Mechanical Property | 1.4435 | 1.4404 (316L) |
|---|---|---|
| Yield Strength (Rp0.2) | 200–230 MPa | 200–230 MPa |
| Tensile Strength (Rm) | 500–700 MPa | 500–700 MPa |
| Elongation (A5) | 40–45% | 40–45% |
| Hardness | ≤ 217 HB | ≤ 217 HB |
| Corrosion Resistance (PREN) | 24–26 | 22–24 |
1.4435 Stainless Steel vs. 316L Stainless Steel: Corrosion Resistance
Due to its higher molybdenum content, 1.4435 stainless steel generally exhibits superior corrosion resistance compared to 316L stainless steel, thus offering better resistance to pitting corrosion, crevice corrosion, and corrosion in acidic and chloride environments. Both are low-carbon austenitic stainless steels with good weldability, but 1.4435 stainless steel is specifically designed for high-purity, high-precision industries with higher requirements for corrosion resistance.
1.4435 Stainless Steel vs. 316L Stainless Steel: Weldability and Formability
Both 1.4435 and 316L stainless steel offer excellent formability and weldability, but 1.4435 stainless steel offers stronger corrosion resistance and is often used for precision parts.
What are the differences between 1.4462 and 1.4435 stainless steel?
The main difference is that 1.4435 is austenitic stainless steel, while 1.4462 is duplex stainless steel, with a microstructure consisting of a mixture of austenitic and ferritic materials. 1.4435 is a more corrosion-resistant austenitic stainless steel. Their chemical compositions also differ; 1.4462 has a higher chromium and molybdenum content, while 1.4435 has a higher nickel content.
What is the price per pound of 1.4435 stainless steel bars?
Currently, the market price for 1.4435 stainless steel bars typically ranges from $2.80 to $3.60 per pound (for industrial bulk purchases). The specific price depends on the diameter, surface finish, and order quantity. Prices fluctuate with the cost of nickel and molybdenum, so bulk buyers usually receive more favorable contract prices.
If you are looking for high-purity, corrosion-resistant stainless steel materials for medical, pharmaceutical, chemical, or high-precision equipment, GNEE can supply EN 1.4435 and EN 1.4404 (316L) stainless steel sheets, coils, plates, tubes, and custom-processed components with EN 10204 3.1 / 3.2 certificates, ISO, SGS, and BV inspection reports.
With more than 18 years of export experience, we help global buyers select the right grade to improve performance, reduce long-term cost, and ensure stable and safe operation. Email: info@gneestainless.com
