Ganpat Metal Industries is one of the pioneer manufacturer & dealer of high quality ASTM A234 WP11 Butt Weld Fittings, which is somewhat more difficult to machine than the 300 series austenitic stainless steels.The high mechanical strength of ASME SA 234 WP11 Pipe Fittings is a result of the microstructure and the alloying with nitrogen. Typical applications are storage tanks, bridges... https://ganpatmetal.com/alloy-steel-astm-a234-wp11-buttweld-pipe-fittings-manufratures-expoters-suppliers-stockists.html