Equivalent designations UNS N10001 Form ASTM Rod B 335 Plate, sheet and strip B 333, B 906 Seamless pipe and tube B 622 Welded pipe B 619, B 775 Welded tube B 626, B 751 Welding fitting B 366 Chemical composition % Ni Mo Fe Co Cr C Mn Si P S V min balance 26.0 4.0 0.20 max 30.0 6.0 2.5 1.00 0.050 1.00 1.00 0.040 0.030 0.40 Physical properties Density 9.24 g/cm3 Melting range 1330-1380℃ Features: Hastelloy B has excellent resistance to reducing environments like sulfuric acid at moderate concentrations and other nonoxidizing acids. It also resists stress corrosion cracking induced by chlorides. Hastelloy B has poor resistance to oxidizing environments, therefore, it should not be used where ferric or cupric salts are present as these salts may cause rapid corrosion failure. Applications: Equipment handling reducing chemical environments; and chemical process industry involving hydrochloric, sulfuric, phosphoric and acetic acids.