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Urea 25.22.2 Fasteners & Machined Components

UREA 25.22.2 is a 310L modified austenitic stainless steel with low carbon, low silicon and high nitrogen additions in order to stabilize and strengthen the austenitic phase.

Urea 25.22.2 Studs, Hexagon Bolts (sets) & Nuts

25.22.2 is designed to obtain a fully austenitic stainless steel free of intermetallic phases as intergranular carbide precipitations which affects the corrosion resistance properties of the alloy in urea containing solutions. The ferrite level is kept under 0.5% in the solution annealing and water quenched conditions. The alloy is particularly designed for improved corrosion resistance properties in urea carbonate environments including strippers. The grade is also well designed for resistance in wet corrosive conditions due to its high contents of chromium, molybdenum and nitrogen (PREN = 33)

The alloy is used across several applications including urea fertilizer units, strippers, nitric acid, sulphuric acid, and in gas treatment plants :


Urea type materials used by Energy Bolting for production include:

DIN Standards:

X2 CrNiMo 18-14-3

X1 CrNiMoN 25-22-2


1.4435, 1.4466, 1.4465


UNS S31603, UNS S31050


316L UG, 310 MoLN

Brand Name

25.22.2 ® 316L MOD UREA ® 3R60 UREA GRADE


Energy Bolting specialise in the bespoke production of Urea grade fasteners & components.

Products include: Studbolts, Hex nuts, Washers, Hexagon Bolts, Hexagon Setscrews, Socket Head Capscrews, 12pt Bi-Hexagonal Bolt & Nuts, Lens Gaskets, Ring Joint Gaskets & Client specific drawings and specifications

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Energy Bolting supply a diverse range of special fasteners, machined components and associated products.

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Data contained is for information purposes only and may be revised at any time. Energy Bolting Limited makes no recommendation or warranty of any kind and assumes no liability with respect to the accuracy of the information contained herein.


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