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Cr-Mo low-alloy consumables

B2 and B3 low-alloy welding consumables for UAE projects.

KHANDU matches B2 and B3 electrode and wire requirements around base-material grade, process, heat-treatment requirements, mechanical properties and project documentation.

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Product overview

Understanding B2/B3 low-alloy consumables

B2 and B3 identify different chromium-molybdenum filler-metal families used with corresponding heat-resistant low-alloy steels. They are not interchangeable labels: the correct grade, process classification and heat-treatment route must match the base material and design code.

Classification framework
AWS B2 and B3 Cr-Mo families; exact designation depends on process
Welding process
SMAW, GTAW, GMAW, FCAW or SAW
Product form
Covered electrodes, solid wires, flux-cored wires or SAW combinations

Typical application context

  • Pressure equipment, piping and components made from compatible Cr-Mo steel grades.
  • Fabrication or repair involving elevated-temperature service and specified heat treatment.
  • Maintenance work where original material grade, service history and repair procedure are known.

Key selection considerations

  • Exact base-metal grade and whether B2, B3 or another Cr-Mo family is required.
  • Preheat, interpass temperature, post-weld heat treatment, hardness and hydrogen control.
  • Creep-service requirements, mechanical tests, chemistry limits and code documentation.

Products and checks

  • SMAW, GTAW, GMAW or FCAW process and exact classification.
  • B2 or B3 base-material grade and service temperature.
  • Preheat, interpass and post-weld heat-treatment requirements.
  • Impact, tensile, chemistry, certificates and procedure qualification.

Project-specific selection

B2 and B3 are product families, not interchangeable labels. The exact electrode or wire classification must be confirmed against the customer's material and welding procedure.

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