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 400F to reduce cooling rate. Use a short to
TYPE: CAST IRON - ARC
medium arc at the lowest amperage possible. Peen
(fully-machinable nickel base)
lightly to relieve stress. Skip weld to prevent
excessive local heat. Cool casting slowly.
NSN: 9GD 3439-00-262-2743 (l/8x14)
CHARACTERISTICS:
POSITION: All
Excellent for out-of-position welding. Bare rod may
be used for GTA welding of the above metals. This
POLARITY: AC or DC Straight or Reverse
rod is hot short; do not permit casting to overheat.
Support properly during welding.
RECOMMENDED AMPERAGES: 1/8 -55 to 110
Tensile Strength: 50,000 psig
USES:
Primary: For welding cast iron in all positions
NOTE: If a nonconductive coating is required in tight
where the weld must have high ductilitv and
fitting areas where arcing through the coating would be
machinability y in the bonded zone.
undesirable - use Marcoloy #302.
Secondary: For joining cast iron to all other metals
except the white metals. It can be used for welding
nickel, monel, stainless and copper alloys when the
proper rods for these metals are not available. Can be
used as a cushion for wearfacing.
PROCEDURES:
Bevel breaks and cracks 75-900 vee. Use the
gouging rod (NSN 9GD 3439-00-453-5950) to remove
unwanted met al. For best machinability, preheat to
1-12
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