ER2594 Welding Wire - TIG Filler Rod & MIG Wire Supplier in India

Nicorex Alloys is a Mumbai-based ISO 9001 and ISO 14001 certified importer and supplier of ER2594 super duplex stainless steel welding wire, classified under AWS A5.9 / ASME SFA-5.9.

ER2594 is a high-performance super duplex filler wire that is designed to resist extreme industrial environments while offering optimum resistance to pitting, stress corrosion cracking, and mechanical failures in harsh offshore environments. This particular solid wire is made of 25Cr-9.5Ni-4Mo-0.27N and is used to make a balanced combination of two types of metal structures. It normally has 35–55% ferrite in a stable austenite foundation. To ensure the highest metallurgical integrity, the wire is strategically over-alloyed by 2-3% in nickel and enriched with nitrogen (0.20-0.30%). This addition compensates for the nitrogen lost during the welding arc. The final weld is ensured to achieve a PREN value greater than 40, thus meeting the basic requirement for being a super duplex stainless steel. The addition of 1.0% tungsten greatly resists pitting in severe environments at high temperatures. Engineers value this filler’s 850 MPa strength, which satisfies AWS A5.9 standards. For maintaining mechanical properties in metals, it is important that heat input be limited within a range of 0.5-1.5 kJ/mm to avoid embrittlement in metals. It is important that back purging be done by using a mixture containing 2-5% nitrogen in argon.

Industry norms need 15% elongation, 758–850 MPa tensile strength, and 650 MPa yield strength. The material has a well-balanced internal microstructure with 30-60% ferrite and an average Charpy impact energy of 27 J at -46°C, making it durable in extreme cold. Industries like oil and gas, seawater, pulp and others widely utilise this alloy.