Inconel 693 vs Inconel 690: when metal dusting decides the grade
Two high-chromium Ni-Cr-Fe alloys that often end up on the same shortlist — and the reformer / syngas service conditions where one is meaningfully better.
Read articleShort, practical articles from our engineering team — the same questions we get asked every week, written down so you can scan them before you email us. Topics cover grade selection, standards, fabrication, welding, and the kind of failure modes that should change a specification.
Two high-chromium Ni-Cr-Fe alloys that often end up on the same shortlist — and the reformer / syngas service conditions where one is meaningfully better.
Read articleThree 6 %-Mo austenitic grades on the same shortlist. How to read the PREN number in context and pick the one that actually pays off in your service.
Read articleBoth are precipitation-hardening martensitic grades, but they are not interchangeable. When XM-25 (Custom 450) earns its premium over 17-4 PH.
Read articleDuplex 2205 handles most chloride service. Here is the short version of when you actually need super duplex 2507 — and when you don't.
Read articleMore articles being added — we publish roughly twice a month. Tell us what you want us to write next: beck@nickel-alloy.com.
If you have a real specification problem, send it through. If we think it would be useful to other buyers, we will write it up and credit you (or keep it anonymous, your call).