POSTALLOY® 2820-SPL
A chromium carbide hardfacing alloy that produces a controlled microstructure 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.
Specifications:
|
Wire Type: |
Metal-cored, open-arc or gas shielded.
Deposits are slag-free. |
Weld Deposit Properties:
- Hardness: 47 - 52 Rc
- Deposit Thickness 3 - 5 layers
- Cannot be flame cut.
Applications:
Most applications involve high impact and crushing, such as the final overlay on:
- Crusher jaws.
- Impact breaker bars.
- Cone and roll shells.
- Pulverizing hammers.
- Hammer mill hammers.
Welding Parameters - DC Straight or Reverse Polarity
|
Diameter |
045" (1.2mm) |
1/16" (1.6mm) |
7/64" (2.8mm) |
|
Current amps |
100-250 |
160-300 |
250-450 |
|
Voltage (DCRP) volts |
15-26 |
20-25 |
24-30 |
|
Stickout inch (mm) |
3/4"-1"(18-25mm) |
1"-1˝ "(25-35mm) |
1˝ "(40mm) |
|
Gas Flow cfh (l/hr) |
NA |
NA |
NA |
While all sizes of Postalloy 2820-SPL will easily operate with or without a gas cover, you may find applications for .045 and 1/16 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:
|
Diameter |
045" (1.2mm) |
1/16" (1.6mm) |
3/32" (2.4mm) |
|
25 lb Spool |
Standard |
Standard |
Standard |
|
55 Lb. Coils |
NA |
Available |
Standard |
|
110, 220 Lb. Drums |
Available |
Available |
Standard |
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