The steel grade 1.4462 (also called UNS S31803/ S32205 , F51 and SS2377) is a stainless acid resistant duplex steel with high strength and extremely good corrosion properties. Due to the duplex structure of the steel (austenitic-ferritic) and high contents of chrome and molybdenium it has very high resistance to pitting corrosion, crevice corrosion, uniform corrosion, corrosion fatigue and stress corrosion cracking. It also has high energy absorption and low thermal expansion.
Chemical Composition
The following table lists 1.4462 stainless steel chemical composition based on cast analysis.
| Chemical Composition, % | ||||||||||
| Steel Grade (Steel Number) | Standard | C, ≤ | Si, ≤ | Mn, ≤ | P, ≤ | S, ≤ | Cr | Ni | Mo | N |
| X2CrNiMoN22-5-3 (1.4462) | EN 10088-2; EN 10088-3 | 0,030 | 1,00 | 2,00 | 0,035 | 0,015 | 21,0-23,0 | 4,5-6,5 | 2,50-3,50 | 0,10-0,22 |
Physical Properties
Notes:
1 g/cm3 = 1 kg/dm3 = 1000 kg/m3;
1 μΩ·m = 1 Ω·mm²/m
1 GPa = 1 kN/mm2
| Physical Properties | |
| Density, g/cm3 | 7,8 |
| Magnetic | Yes |
| Electrical resistivity, μΩ·m | 0,8 (20 ℃) |
| Specific heat capacity, J/(kg·K) | 500 (20 ℃) |
| Thermal conductivity, (W/m·K) | 15,0 (20 ℃) |
| Modulus of elasticity, Gpa | 200 (20 ℃) |
| 194 (100 ℃) | |
| 186 (200 ℃) | |
| 180 (300 ℃) | |
| Mean coefficient of thermal expansion, (10-6/K) | 13,0 (20-100 ℃) |
| 13,5 (20-200 ℃) | |
| 14,0 (20-300 ℃) | |
Use & Application
DIN EN 1.4462 duplex stainless steel can be used for pressure vessels, high-pressure storage tanks, high-pressure pipelines, heat exchangers (chemical processing industry), desalination and sewage treatment systems. Oil and gas pipelines, heat exchanger fittings, pulp and paper industry classifiers, bleaching equipment, storage and processing systems. Rotary shafts, press rolls, blades, impellers, etc. in a high-strength, corrosion-resistant environment. Food processing equipment.
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