HastelloyB-3 bolt

 

Similar brands

GB/T	UNS	Trademark	W.Nr
NS323	N10675	HastelloyB3	2.4665

 

Chemical composition of Hastelloy B-3 bolts

Alloy	%	Ni	Cr	Mo	Fe	W	Co	C	Mn	Si	V	P	S	Cu	Al	Ti	Nb	Ta	Zr	Nimo
HastelloyB-3	Min	≥65	1	27	1	–	–	–	–	–	–	–	–							94
	Max		3	32	3	3	3	0.01	3	0.1	0.2	0.03	0.1	0.2	0.5	0.2	0.2	0.02	0.1	98

 

 

Physical Properties of Hastelloy B-3 Bolts

density	9.24g/cm3
melting point	1370-1418°C

 

Hastelloy B-3 bolts Minimum mechanical properties of the alloy at room temperature

Alloy status	tensile strength Rm N/mm2	Yield Strength RP0.2 N/mm2	Elongation A5%
Hastelloy B-3	760	350	40

 

Hastelloy B-3 bolt alloy has the following properties

1. B-3 alloy is a new member of the nickel-molybdenum alloy family. It has excellent corrosion resistance to hydrochloric acid at any temperature and concentration. At the same time, it also has good corrosion resistance to sulfuric acid, acetic acid, formic acid, phosphoric acid and other non-oxidizing media.
2. Due to the adjustment of its chemical composition, its thermal stability has been greatly improved compared to the original B-2 alloy. B-3 alloy has high resistance to pitting corrosion, stress corrosion, knife edge corrosion and corrosion in the heat affected zone of welding.

 

Metallographic structure of Hastelloy B-3 bolts

B-3 has a face-centered cubic lattice structure. The iron and chromium content of the alloy is controlled to a minimum, thus preventing it from precipitating the NI4MO phase between 700-800°C, thus reducing the risk of processing embrittlement.

Corrosion Resistance of Hastelloy B-3 Bolts

Characteristics of Hastelloy B-3: It can maintain excellent plasticity when exposed to moderate temperatures; Excellent resistance to pitting corrosion and stress corrosion cracking; Excellent resistance to knife edge corrosion and heat affected zone corrosion; Excellent resistance to acetic acid and acetic acid , phosphoric acid and other non-oxidizing acids; excellent resistance to hydrochloric acid corrosion at various concentrations and temperatures.

Hastelloy B-3 bolt application range Application fields include

B-3 alloy can be used for all previous uses of B-2 alloy. Like B-2 alloy, B-3 is not recommended for use in environments where ferric iron salts and divalent copper salts exist, because these salts will quickly Cause corrosion damage. When hydrochloric acid comes into contact with iron and copper, it reacts chemically to form ferric iron salts and divalent copper salts.