Technical Manual for S31050 Stainless Steel Bars
2025 年 9 月 21 日
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Urea-Grade Steel – Engineered for High Corrosion Urea Environments
Specialized stainless steel and alloy grades tailored for urea synthesis plants and high-pressure equipment. Reliable, certified materials for reactors, strippers, condensers, and piping.
What Is Urea Grade Steel?
Urea-grade stainless steels are specially modified alloys designed to resist carbamate corrosion, intergranular corrosion, and stress corrosion cracking (SCC) in urea production environments.
Urea synthesis involves aggressive ammonium carbamate at high temperature and pressure, requiring:
High Cr-Ni-Mo-N content
Low ferrite content
Strict control of residual elements (e.g., Si, P, S)
Guaranteed resistance to SCC and IGC
These steels are certified and tested per urea application standards (e.g., NACE MR0103, ISO 15156, EN 13445).
Products Link
Optional product specifications
| Grade | Description | Application Use |
|---|---|---|
| 316L Mod | Modified 316L with controlled ferrite & impurity levels | Standard for urea synthesis loop piping |
| 25-22-2 | Super austenitic steel with high Cr-Ni-Mo-N content | High-resistance option for urea reactors & strippers |
| 310MoLN | Nitrogen-enhanced high-temp stainless | Urea evaporators, condensers |
| URANUS® B6 | Proprietary urea-resistant alloy | Proprietary reactors / piping |
| Zickler 1.4466 | German-standard modified 316L for urea plants | Condensers, piping systems |
Product Forms: Plate, tube, pipe, bar, flange, forging Standards: ASTM A240, A182, A276, EN 10216-5, NACE MR0175, ASME VIIITested Properties: IGC (per ASTM A262), Ferrite content (<0.5%), SCC resistance, intermetallic phase control
Processing & Packaging
Ultrasonic tested plates (UT Level II / III)
Precision pipe beveling, polishing, machining
Heat treatment & pickling
Markings: grade + heat no. + spec + QR code
Packaging: export wooden cases, pipe end protectors, desiccant
Why Buy From Xishang?
- Years of supply experience to urea equipment OEMs & EPCs
- In-house corrosion testing & PMI before shipment
- Strict ferrite control, intermetallic phase analysis
- Documents per EN10204 3.1 / 3.2 + NDT reports
- Pre-qualified per UREA SYNLOOP piping standards
- Global logistics with project-based packaging & traceability
Frequently Asked Questions
Q1: What is the difference between 316L and 316L Mod for urea service?
A:
316L Mod has tighter control of Si, P, S, and ferrite content, critical for resisting ammonium carbamate corrosion and SCC.
Q2: Do you offer 25-22-2 or 310MoLN for critical urea components?
A:
Yes. We supply plates, tubes, and bars in these high-performance urea grades with full corrosion test certificates.
Q3: Can your material meet urea reactor fabrication codes?
A:
Absolutely. Our products conform to NACE MR0103, ISO 15156, and EN 13445 with UT, IGC and microstructure reports.
Q4: Do you support small project quantities?
A:
Yes. MOQ starts from 100kg. Ideal for maintenance or replacement part supply.
Q5: Can you supply urea-grade flanges and nozzles?
A:
Yes. Custom forged and machined parts for reactors or condensers can be produced with precise ferrite controls.
Let us know your required grade
Xishang delivers high-performance urea-grade steels that meet global EPC and plant requirements with full traceability, corrosion test certification, and responsive project support.
