UNS R30556 Form ASTM Rod B 572 Plate, sheet and strip B 435, B 906 Seamless pipe and tube B 622 Welded pipe B 619, B 775 Welded tube B 626, B 751 Welding fitting B 366 Billet and bar for reforging B 472 Chemical composition % Fe Cr Ni Co Mo W C Mn Si min balance 21.0 19.0 16.0 2.5 2.0 0.05 0.50 0.20 max 23.0 22.5 21.0 4.0 3.5 0.15 2.00 0.80 % P S Al Ta Nb La Zr N B min 0.10 0.30 0.005 0.001 0.10 max 0.040 0.015 0.50 1.25 0.30 0.10 0.10 0.30 0.020 Physical properties Density 8.23 g/cm3 Melting range 1330-1415℃ Features: Haynes 556 combines effective resistance to sulfidizing, carburizing and chlorine-bearing environments at high temperatures with good oxidation resistance, fabricability and excellent high temperature strength. It also resists to corrosion by molten zinc, molten chloride salts and other salts. Applications: Industrial waste incinerators, rotary calciners and kilns, hot-dip galvanizing equipment, aerospace industry high temperature components. Note: Haynes and 556 are registered trademarks of Haynes International, Inc.