S31254 is this super duplex stainless steel that seems pretty advanced for handling tough corrosion stuff. Its UNS number is S31254, and it follows standards like ASTM A240. Compared to regular austenitic or duplex steels, it has better strength and resists corrosion more. I think the mix of chromium, nickel, molybdenum, and nitrogen makes it special. They control the composition carefully during AOD process and then forging or rolling. That leads to about half austenite and half ferrite in the structure, which is key for its performance.
Our sheets come from good slabs, and they go through thermomechanical processing to balance the phases and make sure its homogeneous inside. Its used where you need real safety and long life in operations.
Product Details
Specifications & Technical Parameters
| Standards | ASTM A240 / ASME SA240, EN 10088-2 |
| Thickness (mm) |
Hot Rolled Plate: 6.0 - 100mm,Cold Rolled Sheet / Coil: 0.5 - 6.0mm |
| Width (mm) |
Hot Rolled Plate: 1500 - 3200mm,Cold Rolled Sheet / Coil: 1000 - 2000mm |
| Length (mm) |
Hot Rolled Plate: 4000 - 12000mm,Cold Rolled Sheet / Coil: Coil or Cut Length |
| Yield Strength (0.2% Offset) | ≥ 550 MPa |
| Tensile Strength | ≥ 800 MPa |
| Elongation in 2 inches | ≥ 25 % |
| Hardness (Brinell) | ≤ 290 HB |
Typical chemical composition(wt%)
| Element | Content (%) |
| Chromium (Cr) | 24.0 - 26.0 |
| Nickel (Ni) | 17.0 - 18.5 |
| Molybdenum (Mo) | 6.0 - 7.0 |
| Nitrogen (N) | 0.50 - 0.60 |
| Copper (Cu) | 0.50 - 1.00 |
| Iron (Fe) | Balance |
Features and Advantages
01
Outstanding Corrosion Resistance
Our S31254 plate has a PREN rating over 43, so it stands up really well against pitting, crevice corrosion, and cracking from stress. It works great even when things get tough with chlorides, like in seawater, where other stainless steels can't handle it. This means equipment lasts longer and you don't have to spend as much on upkeep.
02
Exceptional Mechanical Strength
This material's special structure makes it about twice as strong as regular stainless steel like 316L or 304. Because of this, you can build lighter structures or containers but still keep them safe. This saves materials and makes for better designs.
03
Good Fabrication and Welding Properties
While requiring more attention than conventional grades, our S31254 Super Duplex Stainless Steel Sheet is weldable with proper processes. We give Material Test Certificates that specify the chemical analysis, which is critical for directing the selection of suitable filler metals and controlling heat input during welding to maintain corrosion resistance in the weld zone.
Our Strength
We're really good at what we do because we know stainless steel inside and out, and we have a solid supply chain you can trust. We've teamed up with the best mills that are experts in duplex and super duplex stuff. So, we always get the real deal, with all the right paperwork. Other suppliers just sell everything, but our tech folks really get how to work with and use stuff like S31254. We can give you the right advice and find material with the right history and certifications. Basically, you can be sure you're getting exactly what you need.
Applications
Service & Support
01
Precision Cutting
Plasma, waterjet, or laser cutting to exact dimensional drawings, resulting in ready-to-use components.
02
Heat Treatment
To get the best rust protection after certain steps in making something, we can use a solution annealing and quick quenching method (according to ASTM A480), if needed.
03
Non-standard surface finishes
Include plates with polished, pickled, or blasted surfaces that differ from typical mill finishes.
04
Testing and certification
Coordinate additional third-party testing (e.g., PMI, pitting corrosion tests) as defined in your quality plan.
Our Services
At Jiangsu CunRui Metal Products Co., Ltd., we get that buying specialty steel is a big deal.
We offer a smooth service that works well with alloys like S31254. We can give you detailed advice before you buy to help you pick the best type for what you need it for.
We take care of the whole shipping process, so your stuff gets there when you need it and in great shape. Plus, we have all the paperwork to prove where it came from.
Our team is here to help after you buy, too, with tips on how to handle, store, and work with the steel.
FAQ
Q: How does S31254 compare to 316L or 2205 Duplex?
A: S31254 (Super Duplex) is way better at resisting pitting and chloride stress corrosion cracking. It also has almost twice the yield strength of 316L. Compared to 2205 (standard duplex), it handles corrosion better, especially when there's a lot of chloride around, so it's good for tougher jobs.
Q: What's important when welding S31254 plates?
A: You gotta use super duplex filler metals that match (like ER2594), keep the temperature between passes down (usually under 100°C), and stick to a good welding process. This keeps the weld area strong and able to resist corrosion. It's a good idea to get advice from welding pros.
Q: Can I get paperwork for the material?
A: Yes. Every order comes with a Mill Test Certificate (MTC) or Certificate of Conformity. It's got the actual chemical stuff, strength numbers, and heat number so you can trace everything back.
Q: How long does it usually take to get S31254 plates?
A: Delivery time depends on the specific size, quantity, and required processing. For standard sizes from our stock or mill inventory, lead times typically range from 1 to 4 weeks. We provide a firm schedule upon order confirmation.
Q: How should S31254 plates be stored and handled?
A: Store plates separately from carbon steel to avoid iron contamination. Use clean, dry padding and lifting equipment. Protect the surface from scratches and mechanical damage that could compromise corrosion resistance in localized areas.
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