Premium SS 400 Series Fittings & Flanges – Grades 409, 410, 420, 430, 440A/B/C, 446 – Flanges & Fittings – Buttweld, Forged & Outlet Types for Structural, Automotive & Industrial Applications – NACE, PED, IBR Certified. We are an ISO 9001:2015 certified manufacturer and global supplier of Stainless Steel 400 Series components, offering a wide range of grades such as 409, 410, 420, 430, 440A, 440B, 440C, and 446. Our portfolio includes buttweld pipe fittings, flanges, forged fittings, and olets manufactured in compliance with ASTM A403, A182, and dimensional standards like ASME B16.5, B16.9, B16.11, and MSS SP-97. These stainless steel grades are known for their excellent mechanical properties, wear resistance, and high-temperature performance, making them ideal for critical industrial environments. The 400 Series includes ferritic (409, 430, 446) and martensitic (410, 420, 440A/B/C) stainless steels. Ferritic grades such as 409 and 430 offer good corrosion resistance, oxidation resistance, and weldability – suitable for exhaust systems, heat exchangers, and architectural use. Martensitic grades like 410, 420, and 440C provide high hardness, wear resistance, and mechanical strength – ideal for cutlery, valves, pumps, and tooling applications. We supply buttweld elbows, tees, reducers, and pipe caps, flanges (WNRF, SORF, BLRF, RTJ), forged fittings (socket weld/threaded), and olets (Weldolet, Sockolet, Threadolet) in Class 150 to 2500 and schedules SCH 10 to XXS. Stainless Steel 400 Series is widely used in automotive exhaust systems, heat-resistant applications, petrochemical processing, industrial tooling, furnace components, kitchen equipment, and power generation. Grade 446 excels in high-temperature and oxidation-resistant service; 440C is widely chosen for knife blades and bearing parts due to its exceptional hardness; while 430 and 409 are common in fabrication and structural uses due to good formability and corrosion resistance. These grades strike a balance between performance and cost-effectiveness, making them suitable for high-volume and long-term…