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316L UG (Urea Grade)

UREA GRADE 316L, EN-1.4435, UNS S31603

urea-grade-316l-uns-en-1.4435

UREA GRADE 316L

The material UREA 316L grade (also known as 316L modified) has been created for urea plant applications. It is a 316L modified stainless steel with extra-low silicon content and substantial higher molybdenum contents. The low carbon content, combined with a well balanced chemistry (low silicon and nickel content close to 14%) makes the alloy fully austenitic, free of intermetallic phase precipitations. The ferrite level is kept under 0.5% in the solution annealing and water quenched conditions. The alloy is designed for improved corrosion resistance properties in Urea carbonate environments.

 

 

 

Urea Grade is characterized by:

  • High resistance to corrosion in ammonium carbamate
  • High resistance to intergranular corrosion
  • Good weldability

 

Product standards:

  • ASTM A213, A312
  • EN 10216-5
  • DIN 17458

 

Standards :

  • ASTM: TP316L
  • UNS: S31603
  • EN Number: 1.4435
  • EN Name: X2CrNiMo 18-14-3
  • Nr.: 1.4435
  • DIN: X 2 CrNiMo 18 14 3
  • SS: 2353
  • BS: 316S13
  • EN 10088
  • EN 10028
  • AFNOR Z3 CND 18.14.03
  • ASTM 316L modified

 

Applications:

Typical urea plant applications of 316L Urea Grade are:

  • Carbamate condensers
  • Scrubbers
  • Decomposers
  • High pressure piping.

 

Chemical composition / Chemistry (nominal) %

C Si Mn P S Cr Ni Mo
≤0.020 0.4 1.7 ≤0.015 ≤0.010 17.5 14 2.6

 

 

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