Description: AFM 300 is a buildup and overlaying electrode for all ferrous metals subjected to moderate abrasion, severe impact and corrosion. Weld deposits of AFM 300 are strong and tough, however with an average hardness of Rc 26-31, they do remain machinable.
Applications: Typical applications include tractor rollers, sprockets, idlers, concrete mixer blades, bearing journals and other parts which require machin-able weld deposits.
Procedures: Clean the weld area. Use AC or DC+ polarity. Preheating is not required, although heavier sections should be preheated to 200-300¡ÆF. Maintain a medium arc length and use a weaving technique or stringer beads up to twice the diameter of the electrode. Avoid the buildup of heat at any one location on the base metal. Remove slag between passes and allow the base metal to air cool. If severe abrasion is encountered, a final pass of AFM 800 should be considered.
Typical Chemical Composition:
| ( C ) |
Carbon |
0.20 |
| ( Cr ) |
Chromium |
0.7 |
| ( Mn ) |
Manganese |
1.48 |
| ( Si ) |
Silicon |
0.60 |
Recommended Amperage (AC or DC+):
| Size |
1/8 |
5/32 |
3/16 |
1/4 |
| MM |
3.2 |
4.0 |
4.8 |
6.4 |
| Amps |
60-130 |
120-180 |
170-240 |
240- 300 |
Packaging: All sizes are packaged in 10 lb. containers-3 containers per 30 lb. master carton.
