Stainless Steel Grade 310 MoLN (UNS S31050)

Topics Covered

Chemical Composition
Mechanical Properties


Stainless steel grade 310 MoLN is a fully austenitic stainless steel that does not have intermetallic phases such as intergranular carbide precipitations. The 310MoLN steel grade has an optimized chemical composition designed specifically for applications in urea plants. The nitrogen in the chemical composition helps to stabilize and strengthen the austenitic phase. This material provides improved corrosion-resistance in urea carbamate environments such as high-pressure strippers.

The following datasheet provides an overview of stainless steel grade 310 MoLN.

Chemical Composition

The chemical composition of stainless steel grade 310 MoLN is outlined in the following table.

Element Content (%)
Iron, Fe Balance
Chromium, Cr 24-26
Nickel, Ni 21-23
Molybdenum, Mo 2-2.50
Manganese, Mn ≤ 2
Nitrogen, N 0.10-0.16
Silicon, Si ≤ 0.70
Phosphorous, P 0.025
Carbon, C ≤ 0.020
Sulfur, S ≤ 0.010

Mechanical Properties

The mechanical properties of stainless steel grade 310 MoLN are displayed in the following table.

Properties Metric Imperial
Tensile strength 540-740 MPa 78320- 107327 psi
Proof strength 250 MPa 36259 psi
Modulus of elasticity (20°C) 195 GPa 28282 ksi
Elongation at break (In 2", 50% cold worked) 40% 40%
Hardness, Brinell 95 95


  1. Mayur Chauhan Mayur Chauhan India says:

    What is the effect of boron on 25Cr-22Ni-2Mo ?

  2. Quality Control KeyTech Quality Control KeyTech India says:

    How pipe fittings are made from grade 310 MoLN?
    As this grade is not listed in SA-403

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