Aperam and Outokumpu supply super duplex steel plates to refineries, offshore platforms, and desalination plants worldwide. Both mills melt, roll, and heat treat duplex grades to ASTM A240 and EN 10028-7, yet their production philosophies diverge in ways that matter on a specification sheet. This blog compares how each producer manufactures super duplex plate, so procurement teams can match project needs to the right source. <\/p>\n\n\n\n
The mill stamped on a material test certificate determines more than brand reputation. Melting practice and quench rate control the ferrite-austenite balance in duplex microstructure, and a shift of a few percentage points there changes toughness and corrosion resistance. Traceability from heat number to finished plate protects multi-year projects from mixed-grade shipments. Compliance with NORSOK M-630, PED 2014\/68\/EU, or NACE MR0175 depends on documented process control at the mill itself, and inconsistent metallurgy can surface as failure years into service.<\/p>\n\n\n\n
Aperam runs smaller batch sizes with tight process windows across its Belgium and Brazil facilities. Outokumpu operates larger integrated lines from Tornio and Sheffield, with scale and repeatability. Aperam favors tailored metallurgy for niche applications, while Outokumpu centers on volume consistency across standard grades.<\/p>\n\n\n\n
Aperam duplex steel plates<\/strong><\/a> span LDX 2101, 2205, and 2507 grades, rolled from 3mm to 100mm thickness. Outokumpu’s Forta DX and SDX lines cover the same grade family plus proprietary variants such as LDX 2404, with select facilities rolling up to 150mm. Standard sheets run 1500mm x 6000mm and 2000mm x 6000mm from both mills.<\/p>\n\n\n\nQuality Control and Testing Standards<\/strong><\/h3>\n\n\n\n