Project Description
310MoLN (UNS S31050 / W.Nr. 1.4466)
310MoLN (UNS S31050 / W.Nr. 1.4466) stainless steel grade is a fully austenitic stainless steel that does not have intermetallic phases such as intergranular carbide precipitations. For applications in urea plants 310MoLN steel grade has a specifically designed optimized chemical composition. To stabilize and strengthen the austenitic phase the nitrogen in the chemical composition helps. 310 MoLN, material gives excellent corrosion-resistance in urea carbamate environments such as high-pressure strippers. Among wrought austenitic stainless steels it has a fairly high base cost. And it has a fairly high embodied energy and a fairly low ductility.
Equivalent Grades
Trademark | GB | GOST | ASTM | UNS | DIN | W.Nr. | NF | BS | JIS | SS |
Uranus 25 22 2 2RE69 3R60U.G Cronifer 25.25.LCN 725LN Ultra 725LN | 022Cr25Ni22Mo2N | 02Х25Н22АМ2 | AISI 310MoLN | S31050 | X1CrNiMoN 25-22-2 | 1.4466 | Z1 CND 25.22.Az | X1CrNiMoN 25-22-2 | – | – |
Chemical Composition, %
Alloy | C | Si | Mn | P | S | Cr | Ni | Mo | N | Fe |
310MoLN | ≤0.02 | ≤0.70 | ≤2.00 | ≤0.025 | ≤0.010 | 24.0-26.0 | 21.0-23.0 | 2.0-2.5 | 0.10-0.16 | Bal |
Typical Physical and Mechanical Properties (RT, Annealed)
Density, g/cm3 | Melting Point, ℃ | Tensile Strength, MPa | Yield Strength, MPa | ELongation, % | Hardness, HB |
7.9 | 1030-1180 | 540-740 | ≥250 | ≥35 | / |
Available Products and Specifications
Rod, Bar, Wire and Forgings | ASTM A182/ASME SA182 |
Plate, Sheet and Strip | ASTM A240/ASME SA240, ASTM A959 |
Pipe and Tube | ASTM A213/ASME SA213, ASTM A312/ASME SA312 |
Welding Product | – |
Others | ASTM B366/ASME SB366 |
Features
- Excellent resistance to corrosion in ammonium carbamate and nitric acid
- Excellent resistance to intergranular corrosion
- High resistance to pitting and crevice corrosion
- Good weldability
Applications
- Urea applications
- Pulp & Paper industry
- Flue gas cleaning
- Chemical industry
- Pharmaceutical industry
- Striper Tubes
- Outerlayer of bimetallic
- Ferrules
- Carbamate Condensers
- Decomposers
- Reactor Coils