Nihonweld NHF-NiMn description: NHF-NiMn is a basic coated which electrode which deposits weld metal containing 12 – 14% manganese with approximately 3% nickel. The deposit has a reduced tendency for cracking and heat embrittlement compared with plain 12 – 14% manganese weld metal. Suitable for building up worn 14% manganese steel components. It is not recommended for joining manganese steel to mild or to itself.