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Our factory for high and medium pressure valves working in water, steam, petroleum and other media ≤450 °C, the key part of the valve - the sealing surface of the valve disc is generally JH-D516Ma welding rod produced by Jinzhou Electric Welding Rod Factory for manual surfacing And then processed by cutting. Since the surfacing layer has good heat resistance, wear resistance, corrosion resistance and thermal crack resistance, it can be preheated before welding and is not heat treated after welding. The chemical composition of the surfacing layer is equivalent to the addition of Mn content to the 2Cr13 stainless acid-resistant steel (see table).
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