What material is 1.4432?
1.4432 (X2CrNiMo17-12-3) is an austenitic chromium-nickel-molybdenum stainless steel (commonly known as V4A or 316L stainless steel). Compared to standard 316/316L stainless steel, it offers higher corrosion resistance due to its higher molybdenum content (typically 2.5% to 3.0%), and performs particularly well in resisting chlorides and acids.
What is the equivalent material for 1.4432?
EN 1.4432 (X2CrNiMo17-12-3) is a highly corrosion-resistant, acid-resistant austenitic stainless steel, most closely resembling the properties of AISI 316L. It is an improved, low-carbon version of the 316 series, and due to its higher molybdenum content (>2.5%), it offers superior resistance to pitting and chloride corrosion, making it a preferred alternative to 1.4404 (316L).
| EU EN |
USA - |
Japan JIS |
France AFNOR |
England BS |
Sweden SS |
Russia GOST |
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Chemical composition % of steel X2CrNiMo17-12-3 (1.4432): EN 10088-2-2005
| Particular ranges of sulphur content may provide improvement of particular properties. For machinability a controlled sulphur content of 0.015 % to 0.030% is recommended and permitted. For weldability, a controlled sulphur content of 0.008 % to 0.030 % is recommended and permitted. For polishability, a controlled sulphur content of 0.015 % max is recommended. Elements not listed in this table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. |
| C | Si | Mn | Ni | P | S | Cr | Mo | N |
| max 0.03 | max 1 | max 2 | 10.5 - 13 | max 0.045 | max 0.015 | 16.5 - 18.5 | 2.5 - 3 | max 0.11 |
Mechanical Properties of EN 1.4432 Stainless Steel
| Property | Value |
|---|---|
| Yield Strength (Rp0.2) | ≥ 200 MPa |
| Tensile Strength (Rm) | 500 – 700 MPa |
| Elongation (A5) | ≥ 40 % |
| Hardness | ≤ 215 HB |
| Impact Toughness | Excellent (at room temperature) |
Physical Properties of EN 1.4432 Stainless Steel
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1370 – 1400 °C |
| Thermal Conductivity (at 20°C) | 15.0 W/m·K |
| Coefficient of Thermal Expansion (20–100°C) | 16.0 µm/m·K |
| Electrical Resistivity (at 20°C) | 0.74 µΩ·m |
| Specific Heat Capacity (at 20°C) | 500 J/kg·K |
1.4432 stainless steel Corrosion Resistance
1.4432 (X2CrNiMo17-12-3) is a high-molybdenum (≥2.5%), low-carbon austenitic stainless steel that offers superior corrosion resistance compared to standard 316L stainless steel, especially in chloride-rich, acidic, and marine environments. Its higher molybdenum content provides excellent resistance to pitting and crevice corrosion, while the low carbon content prevents intergranular corrosion after welding.
1.4432 Stainless Steel Applications
Chemical & Processing Industry: Storage tanks, pipelines, and equipment handling organic and inorganic acids.
Marine Environment: Equipment exposed to saltwater.
Pharmaceutical & Food Industry: Vessels and piping requiring high hygiene and corrosion resistance.
Environmental Technology: Water treatment, pulp, and paper machinery.
1.4432 vs. 1.4404 (316L)
While both are low-carbon stainless steels, 1.4432 has a higher molybdenum content (roughly 2.5–3% vs. 2–2.5%), making it better suited for more demanding corrosion environments compared to standard 1.4404 (316L).
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