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Alloy B-2

information

Equivalent designations
UNS N10665
DIN W. Nr. 2.4617

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
Forged or rolled pipe flange and forged fitting	B 462
Billet and bar for reforging	B 472
Forging	B 564

Chemical composition

%	Ni	Mo	Fe	Cr	Co	C	Mn	Si	P	S
min	balance	26.0
max	balance	30.0	2.0	1.00	1.00	0.020	1.00	0.10	0.040	0.030

Physical properties

Density	9.22 g/cm3
Melting range	1330-1380℃

Features: Hastelloy B-2 has outstanding resistance to hydrochloric acid at all concentrations and temperatures. It also has significant resistance to reducing environments like sulfuric, phosphoric, acetic acids and other nonoxidizing media. Hastelloy B-2 has excellent resistance to pitting corrosion, stress corrosion cracking, and knife line and weld heat-affected zone attack. Hastelloy B-2 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.

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