Description: AFM 250 is for building-up mild and low alloy steel parts to within 3/16¡±-3/8¡± of their original size. Weld deposits will be part ferritic-part martensitic in structure. AFM 250 weld deposits have good compressive strength and resistance to plastic deformation. Weld deposits are easily machined in the ¡°as welded¡± position. An excellent underlayment prior to hardsurfacing. Very good impact resistance; poor abrasion resistance.
Applications: Underlaying for hardsurfacing, steelmill wobblers and pads, shafting, small rolls, pump parts.
Typical Chemical Composition:
- Carbon (C) - 0.07
- Silicon (Si) - 0.50
- Manganese (Mn) - 1.59
- Chromium (Cr) - 1.30
- Iron Base (Fe) -BAL
Applications: Use DC Reverse Polarity (electrode positive). The shielding gas should be 100% CO©÷ welding grade, however a 75% Argon/25% CO©÷ mixture will increase the hardness
slightly. Superior properties are achieved if an interpass temperature of 300¡Æ-480¡ÆF is maintained. Yield the smoothest performance.
Standard Diameters & Packaging:
- .045 (1.2mm) x 25# spool
- 1/16 (1.6mm) x 25# spool
- Other sizes and packaging are available
