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Astro OA40 Hardfacing Cored Wire

Hardfacing Alloy for Severe Abrasion and Low to Moderate Impact

Astro OA40 is a gasless Semi-automatic open-arc hard surfacing alloy, designed for combining good compressive strength and hardness to provide excellent resistance to wear caused by heavy abrasion.

From : $1,658.60




The weld deposit has high compressive strength and is recommended for hardfacing crusher parts and hammer mill parts used in pulverising operations. OA-40 also has these great features:

  • High in alloy, abrasion-resisting particles
  • Weld deposit takes on a high polish
  • Weld deposit will check crack readily to relieve stress



An excellent resistance to abrasive wear is provided when this alloy is used for hardfacing such as: Hammer Mill parts, Crusher parts, Expeller Screws, Augers, Pug Mill Augers, Dredge Cutters and Shovel Bucket Teeth.



Abrasive resistance: Excellent
Impact resistance: Good (low to moderate impact)
Compressive strength: Excellent
Hardness: 61-64 R.C.



OA-40 should be deposited with the open arc only (no gas required), using direct current, reverse polarity. The recommended amperage range is 180-250 amperes at 26-28 volts. A weaving technique is recommended to develop maximum abrasion and impact resistance.  Application thickness should be limited to 2 passes or 6mm (¼”). Stick out 35mm.  Deposition 4.5Kg/hr at 200 amps.

Additional information


1.6mm 15kg spools


2 Rolls, 1 Roll

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