Fertiliser
Urea synthesis is a classically severe duty — ammonium carbamate at pressure and temperature attacks conventional stainless rapidly, and dedicated urea-grade materials are specified. Phosphoric acid service brings fluoride and chloride contamination that drives selection towards 904L and Alloy 20.
What gets specified in fertiliser
Ordered by how commonly they are called for in this sector.
- UNS N08904904LPREN 35
High nickel, high molybdenum, with copper. Built for sulphuric acid service.
- UNS N08020Alloy 20PREN 30
Nickel-iron-chromium with copper and niobium. Developed for sulphuric acid.
- UNS S31803 / S32205 / S32550 / S32750 / S32760Duplex / Super DuplexPREN 41
Roughly equal austenite and ferrite. Around twice the yield strength of 316L.
- UNS S31600 / S31603316 / 316LPREN 25
304 plus 2–3% molybdenum. The standard answer to chlorides and mild acids.
- UNS N06022Hastelloy C22
Nickel-chromium-molybdenum-tungsten. Resists both oxidising and reducing media.
Applications
05- Urea synthesis and stripper equipment
- Ammonia plant piping
- Phosphoric acid handling
- Evaporator and crystalliser vessels
- Granulation plant
Governing standards
03- ASTM A312
- ASTM A240
- EN 10216-5
Verification available
10- Spectrometer
- Chemical Testing Laboratory
- Positive Material Identification (PMI)
- Spectro Test
- Tensile Testing Machine
- Hardness Testing Machine
- Portable Hardness Tester
- Flattening Test
- Reverse-Bend Test
- Hydrostatic Test Machine
What fertiliser buys
Other industries
Supplying into fertiliser?
Send the specification and service conditions. We will confirm the grade, the availability and the documentation you will need.