DUROARC 21 Hard Facing Electrode

Product Code: HFE-DUR21
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$139.00 (GST Excl.)

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General high hardness hardfacing electrode DUROARC® 21 is a “self-hardening” wear resistant overlay engineered for abrasion and abrasion combined with medium impact. The alloy chemistry provides good resistance to spalling and chipping while the special low hydrogen coating minimises dilution and helps to eliminate underbead cracking. Use on carbon and low alloy steels, It can be used out-of-position and can be used with all types of AC or DC equipment. SPECIFICATIONS Hardness as Deposited............................56-58 Rc Deposit Thickness....................................2-3 Passes Deposits are non-machinable APPLICATION • Excavator parts • Tamping tools • Screw conveyors • Elevator bucket lips • Muller tires • Mining • Earthmoving and construction equipment • Bucket lips and teeth • Dozer and grader blades • Grader end bits • Post hole augers • Wear areas on clamshell • Dragline and shovel buckets WELDING PROCEDURES (POLARITY - AC/DC STRAIGHT OR REVERSE) Due to lower dilution, DC reverse polarity will produce a higher first pass hardness and is also ideal for thin sections. Remove all damaged or fatigued metal. Preheating is generally not required. However, for high carbon or alloy steels and cast iron, a preheat of approximately 400°F (204°C) is recommended. Maintain a short to medium arc using a weave technique. Remove slag.

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