Hastelloy B3 Pipes and Tubes

HASTELLOY B-3 alloy is an incredible resistance alloy to hydrochloric acid at all concentrations and extreme temperatures. It also endures sulfuric, acetic, formic, and phosphoric acids and other nonoxidizing media. B-3 alloy has special chemistry created to achieve a level of thermal stability greatly superior to that of its predecessors.

Hastelloy B3 is a nickel-molybdenum alloy with outstanding resistance to pitting, corrosion, and stress-corrosion cracking plus, thermal stability superior to alloy B2, HASTELLOY B3 Pipe & HASTELLOY B3 Tube is a nickel-molybdenum alloy with excellent resistance to corrosion, and stress-corrosion cracking plus pitting, thermal stability superior to that of Hastelloy B2.

Specification

Hastelloy B-3 Seamless Pipe: ASTM/ASME B 622 / SB 622

Hastelloy B-3 Seamless tube: ASTM/ASME B 444 / SB 444

Hastelloy B-3 ERW Pipe: ASTM/ASME B 619 / SB 619

Hastelloy B-3 ERW Tube: ASTM/ASME B 626 / SB 626

Chemical Composition

GRADE

 

Ni

Mo

Co

W

Mn

Cr

Al

Si

Ti

Nb

V

Ta

Zr

Alloy B-3

Min

27

 

1

0.1

Max

65

32

3

3

3

3

0.05

0.1

0.2

0.2

0.2

0.02

0.01

Production Process

Alloy B-3 or UNS N10675 are manufactured such as ERW ( Electric Resistance Welded), Seamless and EFW ( Electric Fusion Welding) Pipes and Tubes having a different form such as round, square, rectangle, etc having a specific end as Plain End, Bevel End and Threaded End with a nominal thickness of different schedule ranging from SCH 5 to SCH XXS. 

The process through which pipes and tubes can be manufactured includes the cold pilfering process, Extrusion process, tube mill Process also Piercing process followed by heat treatment and mechanical testing.

Fabrication and Heat Treatment

HASTELLOY B-3 alloy has excellent overall forming and welding characteristics. It may be forged or otherwise hot worked, provided it is held at 2250°F (1230°C) for a time sufficient to bring entire piece to temperature. Since it’s a low carbon alloy, the use of lower hot finishing temperatures may be crucial to have grain size control. 

B-3 alloy may be formed by cold working. Although it does work-harden somewhat speedily, B-3 alloy components can be made using all common cold forming techniques. B-3 alloy is a solution heat-treated at 1950°F (1065°C) and rapidly quenched.

Properties

The elemental function of the Hastelloy B-3 alloys is to survive under high-stress, extreme temperature applications; the main benefit of Hastelloy B-3 is its capability to resist hydrochloric acid at all temperatures and concentrations. It also resists other vigorously corrosive agents extremely well.

B-3 alloy has unique chemistry designed to achieve a level of thermal stability greatly higher than its predecessors, e.g. HASTELLOY B-2 alloyB-3 alloy has an incredible resistance to pitting corrosion, to stress-corrosion cracking, and to knife-line and heat-affected zone attack.

Mechanical Properties

Grade

Tensile Strength

Yield Strength

Elongation

[MPA]

[MPA]

(% in 50mm) min

Hastelloy B-3

880

440

57

Physical Properties

Grade

Density (g/cm3)

Elastic Modulus (GPa)

Coeff of Thermal Expansion (μm/m/°C)

Thermal Conductivity (W/m.K)

Electrical Resistivity (Ωμ.m)

Elastic Modulus (GPa)

Specific Heat ( J/Kg.K)

Melting Range

0-100°C

0-100°C

at 100°C

Alloy B-3

9.22

220

10.6

12.1

1.37

216

382

1418°C

C

Application

Hastelloy B-3 is frequently used in the production and processing of many concentrated acids. Hastelloy B-3 is also used to make mechanical components and vacuum furnaces. 

Alloy B-3 pipe or alloy b-3 tube also has many applications in chemical processing. These include making plants for ethylbenzene, phenol, and acetic anhydride production. The pressure vessels used for chloroprene production, along with nuclear reactors, chemical reactors, and distillation equipment are manufactured in Hastelloy B3 alloy.

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