DIN EN 1.4462 stainless steel (X2CrNiMoN22-5-3 Material) is an Austenitic-Ferritic duplex steel, which combines the excellent properties of austenite and ferrite, and has good resistance to pitting, surface and intergranular corrosion, and higher resistance to stress corrosion cracking. 1.4462 material also has good weldability and mechanical properties, its strength is about twice that of austenite such as AISI 304 grade stainless steel. Due to these excellent properties, this material can be used in many areas of the marine industry.
The following tables summarize DIN EN 1.4462 duplex stainless steel datasheet and specifications, such as chemical composition, physical properties, mechanical properties, heat treatment, welding, etc.
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 |
Notes:
| 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 ℃) | |
Material 1.4462 stainless steel mechanical properties at room temperature in the solution-annealed condition and resistance to intergranular corrosion.
| Mechanical properties (Solution annealed) | |||||||||
| Country (Region) | Standard | Steel Grade (Steel Number) | Diameter (d) or Thickness (t) in mm | Hardness (HB), ≤ | 0.2% proof strength (MPa), ≥ | Tensile strength (MPa) | Elongation, % (Longitudinal) | Impact energy, KV2, J (long.), ≥ | Resistance to intergranular corrosion |
| European Union | EN 10088-3 | X2CrNiMoN22-5-3 (1.4462) | ≤160 | 270 | 450 | 650-880 | 25 | 100 | Yes |
| Mechanical properties (Solution annealed) | ||||||||||
| Country (Region) | Standard | Steel Grade (Steel Number) | Product Condition | Thickness (mm), ≤ | 0,2 % yield strength (Mpa), ≥, (Transverse) | Tensile strength (MPa) | Elongation (%), ≥, (long. & tr.) | Impact energy, KV2, J (long.), ≥ | Impact energy, KV2, J (tr.), ≥ | Resistance to intergranular corrosion |
| European Union | DIN EN 10088-2 | X2CrNiMoN22-5-3 (1.4462) | cold rolled strip | 8 | 500 | 700-950 | 20 | – | – | Yes |
| hot rolled strip | 13,5 | 460 | 700-950 | 25 | 100 | 60 | ||||
| hot rolled plate | 75 | 460 | 640-840 | 25 | 100 | 60 | ||||
The following is material 1.4462 stainless steel heat treatment, such as hot forming, solution annealing.
For solution annealing of 1.4462 stainless steel, if the heat treatment is performed in a continuous furnace, it’s usually preferable to specify an upper limit of the temperature range or even exceed it, and cooling should be sufficiently rapidly to avoid precipitation.
| Hot forming | Solution annealing | ||||
| Standard | Designation (Steel number) | Temperature, ℃ | Type of cooling | Temperature, ℃ | Type of cooling |
| DIN EN 10088-2 | X2CrNiMoN22-5-3 (1.4462) | 1150 to 950 | air | 1020 to 1100 | water, air |
| DIN EN 10088-3 | 1200 to 950 | 1020 to 1100 | |||
DIN EN 1.4462 duplex can be welded by all common welding processes (except gas welding), such as WIG, MAG, ARC, and laser welding. It’s recommended to use a slightly higher energy (1-3 kJ/mm) for welding. Filler metal is optional.
Due to its duplex structure, DIN EN 1.4462 duplex stainless steel shows excellent corrosion resistance in acidic environments (especially in phosphoric and organic acids) and chloride-containing media, and is not sensitive to intergranular and stress corrosion cracking, even resistant to intergranular corrosion after welding.
Due to the duplex structure and high basic strength characteristics, 1.4462 stainless steel is difficult to machine.
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.
Material X2CrNiMoN22-5-3, DIN 1.4462 stainless steel equivalent to US ASTM AISI SAE, ISO, European (German DIN, British BSI, France NF), Japanese JIS and Chinese GB standard (for reference).
| EN X2CrNiMoN22-5-3, 1.4462 material equivalent | |||||||||
| European Union | US | ISO | China | Japan | |||||
| Standard | Steel Name (Material Number) | Standard | Grade (UNS) | Standard | Grade (ISO number ) | Standard | Grade (UNS) | Standard | Grade |
|
EN 10088-2; EN 10088-3 |
X2CrNiMoN22-5-3 (1.4462) |
AISI; ASTM A240/A240M; ASTM A276/A276M; |
Duplex 2205 (UNS S32205); UNS S31803 | ISO 15510 | X2CrNiMoN22-5-3 (4462-318-03-I) |
GB/T 1220; GB/T 3280 |
022Cr22Ni5Mo3N (S22293) | JIS G4303; JIS G4304; JIS G4305 | SU |