Postalloy® DuraChrome™ 2820-MCO

Postalloy® DuraChrome™ 2820-MCO is a chromium carbide hardfacing alloy that produces a controlled micro-structure of specially sized carbides in a very tough matrix. For applications involving high impact combined with abrasion. Weld metal is tougher than conventional chromium carbide alloys with fewer stress relieving check-cracks. Use on carbon, low alloy, and manganese steels

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Specifications

Product Type

  • Wire
  • Metal-cored
  • Open-arc
  • Gas-shielded

Applications

  • Final overlay on crusher jaws
  • Impact breaker bars
  • Cone and roll shells
  • Pulverizing hammers
  • Hammer mill hammers

Weld Deposit Properties

Additional:
Deposits are slag-free
Cannot be flame-cut
Deposit Thickness:
3-5 layers
Hardness:
47Rc - 52Rc

Welding Parameters

Current Type: DC Electrode Positive

Volts Amps Diameter Stick Out
15-26 100-250 .045" (1.2mm) 3/4"-1"(19-25mm)
20-25 160-300 1/16" (1.6mm) 1"-1¼"(25-32mm)
23-26 250-350 3/32" (2.4mm) 1"-1½"(25-38mm)
24-30 250-450 7/64" (2.8mm) 1"-1½"(25-38mm)

Welding Procedure:

While all sizes of Postalloy® DuraChrome™ 2820-MCO will easily operate with or without a gas cover, you may find applications for .045" (1.2mm) and 1/16" (1.6mm) for which you prefer a shielding gas. If a gas cover is used, Argon/CO2 or 100% CO2 is recommended. This will cause amperages to go up by about 10% and the stick-out should be shortened.

When welding out of position, use the lower range of amperages and voltages. In addition, a gas cover may be useful, especially when using a constant current power source and voltage sensing feeder.

Packaging Options

Diameter Standard Packaging Standard Packaging Available
.045" (1.2mm) 25 lb (11.30kgs) spool 110 lb (49.90kgs) drum, 220 lb (99.80kgs) drum
1/16" (1.6mm) 25 lb (11.30kgs) spool 110 lb (49.90kgs) drum, 220 lb (99.80kgs) drum
3/32" (2.4mm) 55 lb (25kgs) coil
7/64" (2.8mm) 55 lb (25kgs) coil 110 lb (49.90kgs) drum