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Hastelloy B3

Hastelloy B-3 alloy is an additional member of the nickel-molybdenum family of alloys with excellent resistance to hydrochloric acid at all concentrations and temperatures. It also withstands sulfuric, acetic, formic and phosphoric acids, and other nonoxidizing media. B-3 alloy has a special chemistry designed to achieve a level of thermal stability greatly superior to that of its predecessors, e.g. HASTELLOY B-2 alloy. B-3 alloy has excellent resistance to pitting corrosion, to stress-corrosion cracking and to knife-line and heat-affected zone attack.

Chemical Composition

Grade

%

Ni

Cr

Mo

Fe

W

Co

                    B3

                    Min

                    65

                    1

                    27

                    1

                    -

                    -

                    Max


                    3

                    32

                    3

                    3

                    3

                    C

                    Mn

                    Si

                    V

                    P

                    S

                    Cu

                    -

                    -

                    -

                    -

                    -

                    -

                    -

                    0.01

                    3

                    0.1

                    0.2

                    0.03

                    0.1

                    0.2

                    AL

                    Ti

                    Nb

                    Ta

                    Zr

                    Ni Mo


                    -

                    -

                    -

                    -

                    -

                    94


                    0.5

                    0.2

                    0.2

                    0.02

                    0.1

                    98



Physical Performance

Density

9.24g/cm3



Smelt

1370-1418



Heat Treatment

T*S

Y*S

El

Rm N/mm2

RP0.2N/mm2

A5 %

Anneal

760

350

40


Standard of execution:

Form

                    ASTM

Rod

                    B 574

Plate, sheet and strip

                    B 575

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


Major Applications:
Chemical processes
Vacuum furnaces
Mechanical components in reducing environments

Characteristic as below:
Maintains excellent ductility during transient exposures to intermediate temperatures
Excellent resistance to pitting, corrosion and stress-corrosion cracking
Excellent resistance to knife-line and heat-affected zone attack
Excellent resistance to acetic, formic and phosphoric acids and other non-oxidizing media
Resistance to hydrochloric acid at all concentrations and temperatures
Thermal stability superior to alloy B-2


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