FCW NM14O

Tubular wire for self shielded metal arc hardfacing

Description & applications

• Tubular wire for self shielded metal arc hardfacing

• Austenitic manganese steel type alloy used for build up and reinforcing manganese steel castings and wear components

• Excellent work hardening properties. The degree of work hardening is dependent on the amount of impact on the rebuilt component

• The deposit has the same colour as manganese steel

APPLICATIONS

FCW NM14O deposits a “Hadfield” manganese steel type alloy. It is designed for rebuilding 14 % manganese steel parts. Austenitic manganese steels must be kept cool during welding. Do not preheat. Use intermittent or staggered weld runs and ensure interpass temperature is kept as low as possible.

Deposit can be multi-layered.

Examples

Reclaiming crusher jaws and rolls, gyratory mantles, blow bars, swing hammers, manganese dredge components such as buckets and tumblers, railroad sections, bucket teeth and lips, dragline manganese steel shackles and repair of defects in manganese steel castings.

Classification

EN 14700
T Fe9

Typical weld metal composition (%)

C Mn Si Fe
1.0 14.0 0.5 Balance

All weld metal mechanical properties

Hardness – 3-Layer deposit: As welded Hardness – 3-Layer deposit: Work hardened
200 HB 46 HRc

Shielding gas

Current type DC (+)
Shielding Self shielded

Operating conditions

Diameter [mm] Amperage [A] - Range Amperage [A] - Optimum Voltage [V] - Range Voltage [V] - Optimum Stick-out [mm] - Range Stick-out [mm] - Optimum
1.2 100-300 250 21-35 28 12-25 20
1.6 150-300 270 24-35 28 15-25 25
2.0 200-400 300 26-35 28 20-50 30
2.4 250-450 350 26-35 28 25-50 40
2.8 250-450 400 28-35 30 25-50 40

Welding positions

Flat, half up, half down

Packings & Diameters

Diameters [mm] 1.2 - 1.6 - 2.0 - 2.4 2.4 - 2.8 2.4 - 2.8
Packing(s) Spool BS 300 Coil B 450 Drum
Weight [Kg] 15 25 Up to 330
Description - - -
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