Stainless duplex steel 1.4460, AISI 329 resistant to chlorine according to PN-EN 10088-1.
| Standards | Steel Grades | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Chemical Composition % | |||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Mo: | Ni: | N: | |
| EN / DIN | X3CrNiMoN27-5-2 - 1.4460 | ||||||||
| <0.05 | <2.0 | <1.00 | <0.035 | <0.030 | 25.0 - 28.0 | 1.30 - 2.00 | 4.5 - 6.5 | 0.05 - 0.20 | |
| AFNOR | Z5CND27-05 Az | ||||||||
| <0.05 | <2.0 | <0.75 | <0.035 | <0.025 | 26.0 - 27.0 | 1.30 - 2.00 | 4.5 - 5.0 | 0.05 - 0.20 | |
| ASTM | AISI 329 - S32900 - Alloy 7Mo | ||||||||
| <0.08 | <1.0 | <0.75 | <0.040 | <0.030 | 23.0 - 28.0 | 1.00 - 2.00 | 2.5 - 5.0 | - | |
| ASTM | S31200 - 44LN - Grade F50 | ||||||||
| <0.03 | <2.0 | <1.00 | <0.045 | <0.030 | 24.0 - 26.0 | 1.20 - 2.00 | 5.5 - 6.5 | 0.14 - 0.20 | |
| ASTM | J93371 - 25Cr-5Ni-Mo-N - CD6MN - A 781 Grade 3A | ||||||||
| <0.06 | <1.0 | <1.00 | <0.040 | <0.040 | 24.0 - 27.0 | 1.75 - 2.50 | 4.0 - 6.0 | 0.15 - 0.25 | |
| UNE | X8CrNiMo26-6 - F-3552 | ||||||||
| <0.10 | <2.0 | <1.00 | <0.045 | <0.030 | 24.0 - 27.0 | 1.30 - 1.80 | 4.5 - 7.0 | <0.10 | |
| UNE | X8CrNiMo27-05 - F-3309 | ||||||||
| <0.10 | <2.0 | <1.00 | <0.045 | <0.030 | 26.0 - 28.0 | 1.30 - 2.00 | 4.0 - 5.0 | - | |
| SS | 2324 - SS2324 | ||||||||
| <0.10 | <2.0 | <1.00 | <0.045 | <0.030 | 24.0 - 27.0 | 1.30 - 1.80 | 4.5 - 7.0 | - | |
Description and specification
Stainless duplex low-carbon steel resistant to intercrystalline corrosion, fatigue corrosion, crevice corrosion, pitting and stress corrosion. It exhibits excellent resistance to chlorides and, in addition, is susceptible to mechanical processing. It is characterized by high strength, hardness and good plasticity. Commonly used as steel for bearings in chlorine-containing environments.
However, in high temperatures of 300 - 900 ℃, the steel exhibits brittleness. With respect to duplex 1.4462 steel, the described grade has slightly worse corrosion resistance. Duplex 1.4460 steel products are used in the chemical, cryogenic, paper and aviation industries.
X3CrNiMoN27-5-2 steel is designed, among others, for pumps, screws, heat exchangers for power engineering, radiators, tanks, chlorine-bearing housings, valves, air constructions, pipelines, special anchors, pump shafts, stirrers and sleeves. In addition, the steel retains the resistance to intercrystalline corrosion after welding and in the delivery condition.
Mechanical and physical properties
- Tensile strength: Rm = 620 - 880 MPa
- Yield point: Re = > 460 MPa
- Hardness < 260 HB
- Elongation: A = > 20%
- Modulus of elasticity, E = 200 GPa
- Heat conductivity λ = 15 W ⋅ m-1 ⋅ K-1
- Heat capacity cp20℃ = 500 J ⋅ kg-1 ⋅ K-1
- Density: ρ = 7,80 kg/dm³
Properties for individual temperatures
| Properties | Temperatures | |||||
|---|---|---|---|---|---|---|
| 100℃ | 200℃ | 300℃ | 400℃ | 500℃ | ||
| Yield point | Rp0,2 | > 360 MPa | > 310 MPa | - | - | - |
| Linear Expansion Factor | α | 13.0⋅10-6⋅K-1 | 13.5⋅10-6⋅K-1 | 14.0⋅10-6⋅K-1 | - | - |
| Modulus of elasticity | E | 194 GPa | 186 GPa | 180 GPa | - | - |