OTW-24NM Technical Performance Data Sheet

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For semi - automatic and robotic welding

Castolin OTW 24NM is a hard, stainless steel alloy, specially designed to protect non-mag drill collars, drill pipes and related components on the bottom hole assembly in drilling industry. The alloy is a gas shielded, metal cored alloy wire. The weld deposit is designed to give a crack-free, smooth surface with low friction properties. The wear life as welded will show about 3,5-5 times longer than the non-mag base material alloy, and for increased wear life in open hole environments may be dramatically increased by injection of tungsten carbide pellets into the alloy. The alloy is formulated to be tough, corrosion resistant with low magnetic permeability, less than 1.01. This alloy has been tested & approved according to industry standards. In field gradient measurements the results is lower than 0.03Ut as welded. The alloy may be cost effectively reapplied over it-self to refurbish worn drill pipes after drilling operations. It is only necessary to ensure that the base material and old OTW 24NM coating are free of any physical defects and that safe dimension tolerances are retained.


Specifically developed for new or worn non-magnetic hardbanding of wear bands applied on Non-magnetic drill collars and related drilling components. Designed to be applied on chromium-manganese, austenitic stainless steels and nitrogen bearing austenitic stainless steels. Commonly known base materials such as; P530, AG17, 1515LC NMS-100 and others.