1.4462, UNS S32205, UNS S31803 - duplex steel
Stainless duplex steel 1.4462 resistant to intergranular and stress corrosion according to EN 10088-1.
| Standards | Steel Grades | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Chemical Composition % | ||||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Mo: | Ni: | N: | ||
| EN | 1.4462 - X2CrNiMoN22-5-3 | |||||||||
| <0.03 | <2.0 | <1.0 | <0.030 | <0.02 | 21.0 - 23.0 | 2.5 - 3.5 | 4.5 - 6.5 | 0.08 - 0.2 | ||
| AFNOR | Z3CND22-05AZ - Z 3 CND 22-05 Az | |||||||||
| <0.03 | <2.0 | <0.75 | <0.035 | <0.01 | 21.0 - 23.0 | 2.5 - 3.5 | 4.5 - 6.5 | 0.08 - 0.2 | ||
| ISO | CrNiMo22-5-3 - CrNiMo 22-5-3 | |||||||||
| <0.03 | <2.0 | <1.0 | <0.030 | <0.02 | 21.0 - 23.0 | 2.5 - 3.5 | 4.5 - 6.5 | 0.08 - 0.2 | ||
| UNS | S31803 - F51 | |||||||||
| <0.03 | <2.0 | <1.0 | <0.030 | <0.02 | 21.0 - 23.0 | 2.5 - 3.5 | 4.5 - 6.5 | 0.08 - 0.2 | ||
| UNS | S32205 - DUPLEX 2205 - 2205 - A 182 F60 | |||||||||
| <0.03 | <2.0 | <1.0 | <0.030 | <0.02 | 22.0 - 23.0 | 3.0 - 3.5 | 4.5 - 6.5 | 0.14 - 0.2 | ||
| GOST | 02Ch22N5M3 - 02Х22Н5АМ3 | |||||||||
| <0.03 | <2.0 | <1.0 | <0.030 | <0.02 | 21.0 - 23.0 | 2.5 - 3.5 | 4.5 - 6.5 | 0.08 - 0.2 | ||
| BS | 318S13 - 318 S 13 | |||||||||
| <0.03 | <2.0 | <1.0 | <0.025 | <0.02 | 21.0 - 23.0 | 2.5 - 3.5 | 4.5 - 6.5 | - | ||
| ASME | SUS 329J3L | |||||||||
| <0.03 | <2.0 | <1.0 | <0.040 | <0.03 | 21.0 - 24.0 | 2.5 - 3.5 | 4.5 - 6.5 | 0.08 - 0.2 | ||
| AVESTA SHEFFIELD | SAF 2205 | |||||||||
| <0.03 | <2.0 | <1.0 | <0.030 | <0.015 | 22.0 | 3.2 | 5.0 | 0.18 | ||
Specification and application
Two-phase duplex steel with a ferritic-austenitic structure resistant to high temperatures, operating in acids and salts NaCl, CaCl2, LiCl2, increased chromium - Cr, Molybdenum - Mo, and Nitrogen - N content, occurring in the supersaturated state at temperatures of 1020 - 1100 ℃ in the form of bars, pipes, sheets and forgings.
Duplex steel is characterized by high intercrystalline corrosion resistance, stress corrosion resistance, pitting corrosion resistance, low coefficient of thermal expansion and work temperature up to 200-250 ℃. Compared to ordinary austenitic acid resistant steels, it exhibits much better strength properties and higher wear resistance and erosion resistance.
The above duplex grade depending on the requirements and working environment is used, inter alia, in the chemical, shipbuilding, aviation, cryogenic, paper, mining, petrochemical and power industries.
From this material are made parts and subassemblies such as pumps, coolers, aircraft, bolts, bushes, shafts, valves, tanks and containers for transporting chemical substances on chemical tankers, desalination plant pipes, stirrers, swing arms, off-shore installations, pressure tanks, rotors and fans, petrochemical and processing plants containing chlorides, press rollers, machine parts and equipment used in the papermaking industry.
1.4462 steel exhibits resistance to stress corrosion and cracks in corrosive media such as:
- Calcium chloride -CaCl2 at a concentration of 40% at 100 ℃
- Lithium chloride - LiCl2 at a concentration of 33% at 120 ℃
- Sodium chloride - NaCl at a concentration of 25-28% at 155 °C
Mechanical properties
- Tensile strength Rm= 650 - 850 MPa
- Yield point Re= > 450 MPa
- Elongation, A >25%
- Modulus of elasticityE = 200 GPa
- Hardness < 270 HB
- Heat conductivity λ = 15 W ⋅ m-1 &sdot K-1
- Heat capacity cp20℃ = 500 J ⋅ kg-1 ⋅ K-1
- Density 7,8 g/cm3
Mechanical properties depending on the operating temperature
| Properties | Temperatures | |||
|---|---|---|---|---|
| 100℃ | 200℃ | 300℃ | ||
| Modulus of elasticity E | 194 GPa | 186 GPa | 180 GPa | |
| Yield point Re | > 360 MPa | > 315 MPa | - | |
| Linear Expansion Factor α20℃ | 13,0 ⋅ 10-6 | 13,5 ⋅ 10-6 | 14,0⋅ 10-6 | |
VIRGAMET in above the grades provides:
Substitutes, equivalents and other species designations
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