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Metrode 1NIMOB description: Designed for welding low alloy steels used for pressure vessels (often thick wall) and other applications where high strength must be maintained after extended, or multiple, PWHT cycles. These steels may also be used at modest elevated temperature and tests have shown typically 15% reduction in tensile strength at +300°C compared to the room temperature values for 1NiMo.B weld metal. It is also used for welding type 4130, and other high strength steels, requiring good sub-zero toughness for oilfield and well-head equipment. In comparison with the MnMo types (data sheet A-50) 1NiMo.B has improved resistance to softening at high tempering parameters.

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