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 PROCEDURES:
TYPE: OVERLAY - ARC (manganese wearfacing)
Clean and remove remains of previous cracked or
NSN: 9GJ 3439-00-165-4172 (5/32x 1/4)
brittle hard surfacing deposits. Keep the interpass
temperature on manganese steels low (less than
9GD 3439-00-165-4187 (3/16X 1/4)
500F). This can be done by back stepping and
skip-welding techniques that prevent localized
POSITION: All
overheating.
POLARITY: AC - DC Reverse
CHARACTERISTICS :
This is a manganese chrome nickel electrode. It can be
RECOMMENDED AMPERAGES:
used to build up worn steel parts, but should be held
5/32 -110 to 140
for manganese steel jobs if the supply is limited.
3/16 -150 to 220
(NOTE: DO NOT BUILDUP MANGANESE
USES:
CRUSHER ROLLS OR JAWS WITH A MILD
Primary: This electrode is used for buildup and
STEEL ROD OR A STEEL BUILDUP ROD UNLESS
overlay where severe impact and compression will be
STAINLESS ROD IS APPLIED FIRST.)
encountered. This rod is excellent for building up and
joining manganese steel, for the restoration of buckets,
Hardness: As deposited RB 80-90
bucket teeth and lips, and crushers. It can be used for
Work hardened RC 45-50
joining steel to manganese, and steel to steel.
Secondary: Can be used for joining cast iron, if cast
Tensile Strength: 150,000 psig
rod is not available.
1-22
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