Alloy B-3 – Hastelloy Weldability

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Issues connected with fabrication of alloy B-2 parts should be minimized with Alloy B-3 because of its enhanced thermal stability. A low carbon content grant alloy B-3 to be utilized as a part of the as-welded condition. Hastelloy B-3 has great general forming and welding attributes. This alloy can be forged or generally hot-worked, giving that it is held at 2250° F for an adequate measure of time to convey the whole piece to temperature. Since it is a low carbon alloy, the utilization of lower hot completing temperatures might be important to accomplish grain size control. It may also be formed by cold working.

In spite of the fact that it works-harden somewhat quickly; B-3 alloy parts can be made utilizing all basic cold forming strategies. All basic welding strategies might be utilized with Alloy B-3; be that as it may, oxyacetylene and submerged arc welding process is not recommended when the fabricated thing is to be utilized as a part of corrosive service. The welding of is regularly done on like materials utilizing shield gas processes GTAW and GMAW and the arc welding process. The semi-completed items should likewise be in a stress free, metallic bright condition and free of dirt. With a specific end goal to accomplish ideal corrosion resistance, care must be taken to apply at least heat during welding. Preheating or optional heat treatment is generally unnecessary.

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


Chemical Composition %

GradeC Al Si P S Ti V CrMn Fe Co Ni Cu Zr Nb Mo Ta W Ni+Mo
Alloy B-3 0.01 max 0.5 max 0.10 max 0.03 max0.01 max0.2 max 0.2 max 1.0-3.0 3.0 max 1.0-3.0 3.0 max 65.0 min0.2 max0.1 max0.2 max27.0-32.00.2 max3.0 max94.0-98.0
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