Super Duplex 2507 Machining
You spec Super Duplex 2507 because chloride SCC would eat regular stainless. The shop machining it can undo that choice in one setup by overheating the phase balance. Here's what B&R Productions does differently.
Why 2507 is chosen
Offshore, produced-water handling, high-pressure completions, subsea equipment. Anywhere chloride SCC or pitting corrosion would end the life of 316 stainless.
The failure mode nobody wants
2507 is a 50/50 austenite-ferrite phase balance. Overheat it during machining and the ferrite starts precipitating brittle intermetallics (sigma phase) that destroy the very corrosion resistance the alloy was chosen for. The failure appears months or years later in service. Job shops that don't control cutting temperature turn the customer's material choice into a lie.
How we control temperature
Moderate SFM (110-170 for turning), aggressive feed (0.010-0.015 IPR), sharp carbide with the right geometry, coolant we trust — flood, ideally high-pressure through-tool. Interrupted cuts get extra attention because they cycle heat into the workpiece. Ask us how we're going to control cutting temperature; if a shop shrugs, keep looking.
Parts we machine
- Subsea connectors and hubs
- Choke bodies and internals
- Wellhead sealing surfaces in chloride service
- Produced-water handling components
- High-pressure valve bodies
- Downhole tool components for corrosive service
Frequently asked questions
Can you preserve 2507's corrosion resistance through machining?
Yes — that's the point. Controlled cutting temperature keeps the austenite/ferrite phase balance intact. Ask how we're going to do it and we'll walk you through the setup.
What tolerances are achievable on 2507?
±0.0005" routine on critical features. Bore roundness and concentricity held tighter than most job-shop lathes can offer.
Do you machine other duplex grades?
Yes — Duplex 2205 (S32205), Zeron 100 (S32760), and hyper-duplex on request.
Ready for a quote?
Tell us what you need — bring a print or a sample photo and specs. For emergency and rig-down work, call (936) 291-7827.