Hastelloy B-3


Hastelloy B-3

We specialize in providing Hastelloy B-3 to the clients. Hastelloy B-3 is a nickel-molybdenum alloy with excellent resistance to pitting, corrosion, and stress-corrosion cracking along with high thermal stability. The Hastelloy maintains excellent ductility during transient exposures to intermediate temperatures. B-3 Our Hastelloy B-3 has excellent physical and chemical properties which have led to its high demand in the market.

Product Detail
Hastelloy B-3 is a nickel-molybdenum alloy with excellent resistance to pitting, corrosion, and stress-corrosion cracking plus, thermal stability superior to that of alloy B-2. In addition, this nickel steel alloy has great resistance to knife-line and heat–affected zone attack. Alloy B-3 also withstands sulfuric, acetic, formic and phosphoric acids, and other non-oxidizing media. Furthermore, this nickel alloy has excellent resistance to hydrochloric acid at all concentrations and temperatures. Hastelloy B-3’s distinguishing feature is its ability to maintain excellent ductility during transient exposures to intermediate temperatures. Such exposures are routinely experienced during heat treatments associated with fabrication.

Fabrication with Hastelloy B-3
Problems associated with fabrication of alloy B-2 components should be minimized with alloy B-3 due to its improved thermal stability. A low carbon content permits alloy B-3 to be used in the as-welded condition. Hastelloy B-3 has good overall forming and welding characteristics. This alloy can be forged or otherwise hot-worked, providing that it is held at 2250o F for a sufficient amount of time to bring the entire piece to temperature. Since it is a low carbon alloy, the use of lower hot finishing temperatures may be necessary to achieve grain size control. It may also be formed by cold working. Although it does work-harden somewhat rapidly, B-3 alloy components can be made using all common cold forming techniques. All common welding techniques may be used with alloy B-3, however, oxyacetylene and submerged arc welding processes are not recommended when the fabricated item is to be used in corrosive service.

Forms
  • Sheet
  • Plate
  • Bar
  • Pipe (welded & seamless)
  • Fittings (i.e. flanges, slip-ons, blinds, weld-necks, lapjoints, long welding necks, socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples)
  • Wire

Characteristics
  • 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

Applications
  • Chemical processes
  • Vacuum furnaces
  • Mechanical components in reducing environments


Chemical Composition( %)

Ni 65.0 min
Mo 28.5
Fe 1.5
C .01 max
Co 3.0 max
Cr 1.5
Mn 3.0 max
Si .10 max
Ti .2 max
W 3.0 max
Al .50 max
Cu .20 max

ASTM Specifications

Pipe Smls B366
Pipe Welded B564
Tube Smls B335
Tube Welded B333
Sheet/Plate B626
Bar B622
Forging B619
Fitting B622