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Welding Guidelines

EB-450 is a high strength alloy steel readily weldable by following basic guidelines for good welding technique. The following procedure will prevent cracking from the three most common causes of weld related crack problems. Three areas to be controlled for crack-free welding of EB-450 are:

  • Eliminate hydrogen pick-up in the weld metal during welding.
  • Stress minimization in the weld joint
  • Use of proper preheat and interpass temperatures and avoid rapid cooling of the weld area following welding.

Joint preparation

  • Grind or machine all edges, bevels and surfaces to be welded to remove scale, ruse, etc.
  • Clean any oil, grease, or other residue from weld areas with a solvent which leaves no residue and contains no chlorine.
  • Use small root gaps (0 to 1/8") to minimize cracking
  • Use the smallest included angle bevel possible to allow full penetration with the above root gap.
  • Maintain the best fit-up possible to reduce stress.

Filler Material

  • Use E309 or E309L stainless weld rod. And alternate rod, E7018, is less expensive and less ductile, but should be satisfactory in joints without high constraint.
  • Electrodes must be clean and dry, taken only from newly opened cans or 
    from a 250°F storage oven.
  • Rebaked rods may be used only if reheated according to manufacturer's instructions.

Heat Input

  • The recommended preheat temperature is 250F minimum and the recommended interpass temperatures is 500F maximum.
  • Apply preheat to a broad zone about 12" wide to either side of the weld joint.
  • Maintain preheat from start to finish of weld.
  • Do not quench welds. Air cool in still air.

Welding

  • To minimize heat input, use skip welding and backstop welding procedures.
  • Use stinger beads no greater in width than three times the weld rod diameter.
  • Fill all craters to full cross section
  • Do not "puddle" to fill plug welds. Use good stringer bead technique for plug welding.

    Peen and clean using wire brush after each pass.

  • To the extent possible, avoid restraint of the plate during welding. Restraint limits the natural expansion and contraction that occurs during welding and leads to locked-in stresses which create a potential for cracking.

Product Information
Product Specifications
Machining
Forming
Heat Treating
Cutting
Printable Specs Sheet