316L UG (Urea Grade)
UREA GRADE 316L, EN-1.4435, UNS S31603
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 |
