SMAW · Hardfacing
EFeMn-A
A work hardening manganese steel surfacing rod that stays soft and tough as deposited, then hardens dramatically at the surface once impact loading starts.
What the designation means
Point at any character to see what it claims. The classification is a sentence written in fields, not a product name.
- ECovered electrode for shielded metal arc surfacing.
- FeAn iron base deposit rather than a nickel, cobalt, or copper base.
- MnAustenitic manganese steel chemistry, the classic work hardening deposit used under heavy impact.
- -AThe specific chemistry class within the manganese family, a carbon-manganese type without the nickel addition carried by the companion class.
At a glance
- Process
- SMAW
- Family
- Hardfacing
- Positions
- Flat and horizontal, with buildup normally done downhand
- Polarity
- DCEP, or AC
- Shielding
- Self-shielded by the covering
- Minimum tensile
- -
Typical uses
- Rebuilding crusher jaws, cones, and hammer mill parts
- Repair of railroad frogs, points, and other impact loaded rail hardware
- Buildup on dipper teeth, shovel lips, and dredge components
How it runs
- Deposit is soft and machinable as welded, then work hardens under repeated impact
- Non-magnetic austenitic structure, unlike most hardfacing overlays
- Interpass temperature must be kept low or the deposit embrittles
- Deposits should be short beads, peened and cooled, rather than long continuous runs
Storage and handling
Keep dry in sealed packaging; surfacing coverings pick up moisture and cause porosity in an already crack sensitive deposit.
Compare with
SMAWENi-CIA high nickel rod for repairing grey cast iron, laying down a soft deposit that can be machined afterwards and tolerates the carbon picked up from the base metal.SMAWENiFe-CIThe nickel-iron cast iron rod, stronger and more crack resistant than the pure nickel version and the usual choice for ductile iron and heavily restrained repairs.SMAWECuSn-AA phosphor bronze rod for joining and overlaying copper alloys, and for building up bearing and wear surfaces where a soft, low friction deposit is wanted.