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

TrademarkGBGOSTASTMUNSDINW.Nr.NFBSJISSS
Uranus 25 22 2
2RE69
3R60U.G
Cronifer 25.25.LCN
725LN
Ultra 725LN
022Cr25Ni22Mo2N02Х25Н22АМ2AISI 310MoLNS31050X1CrNiMoN 25-22-21.4466Z1 CND 25.22.AzX1CrNiMoN 25-22-2

Chemical Composition, %

AlloyCSiMnPSCrNiMoNFe
310MoLN≤0.02≤0.70≤2.00≤0.025≤0.01024.0-26.021.0-23.02.0-2.50.10-0.16Bal

Typical Physical and Mechanical Properties (RT, Annealed)

Density, g/cm3Melting Point, ℃Tensile Strength, MPaYield Strength, MPaELongation, %Hardness, HB
7.91030-1180540-740≥250≥35/

Available Products and Specifications

Rod, Bar, Wire and ForgingsASTM A182/ASME SA182
Plate, Sheet and StripASTM A240/ASME SA240, ASTM A959
Pipe and TubeASTM A213/ASME SA213, ASTM A312/ASME SA312
Welding Product
OthersASTM 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