Uranus 47N+ is Aperam/Industeel's trade name for the 2507-type super duplex alloy, UNS S32750, EN 1.4410 — a step up from standard 2205-family duplex (Uranus 45N/45N+) in every alloying dimension that matters for corrosion resistance. Chromium climbs to roughly 25%, molybdenum to around 4%, and nitrogen to about 0.27-0.28%, pushing the guaranteed PREN (pitting resistance equivalent) above 40 versus the mid-30s of standard 2205. That extra alloy content comes without a copper addition, which distinguishes Uranus 47N+ from its sibling Uranus 52N+ — 47N+ leans on chromium, molybdenum, and nitrogen alone for chloride resistance, while 52N+ adds copper specifically for better performance in reducing acid environments.

The microstructure is still a roughly 50/50 austenite-ferrite duplex balance, so the strength and toughness advantages over austenitic stainless carry over, just amplified: super duplex grades typically post even higher yield strength than standard 2205. Uranus 47N+ is specified where standard duplex doesn't provide enough chloride-pitting margin — deep-water subsea components, seawater-handling equipment, and the most aggressive offshore and marine chemical processing service.

Uranus 47N+ is meaningfully harder to machine than standard 2205-family duplex, and the reason is straightforward: every alloying element that was added to push PREN above 40 also raises the strength and abrasiveness of the ferrite phase the tool has to shear on every pass. Cutting forces and heat generation both run above standard duplex, and tool life at 2205-appropriate parameters falls off quickly if speeds and feeds aren't scaled back to match the alloy's higher mechanical strength.

Work hardening from a dragging edge is still a smaller factor here than on straight austenitic grades, but that offers little relief given how strongly the base material itself resists shearing. Prioritize a tough substrate with a wear- and heat-resistant coating, generous edge support, and conservative depths of cut and feeds rather than parameters borrowed from standard duplex or 316. Machine and workholding rigidity matter more on Uranus 47N+ than on almost any lower-alloy material — chatter or deflection accelerates flank wear and raises the risk of edge chipping quickly.