1. Testing Testing method method for for steel steel castings castings Ningbo parfect machinery Co., Ltd. is a professional production of various types of cast steel, alloy steel, stainless steel, cast steel, alloy castings export-oriented enterprises. testing methods of cast steel pars need to be equipped with reasonable detection methods and the appropriate inspector of finished steel castings for quality inspection. 1, the appearance inspection of the steel castings can be used to determine the comparison pieces to determine the surface roughness of steel casting, the surface inspection of the fine cracks can be used with coloring, magnetic particle method. 2, the internal quality of cast steel can use available audio, ultrasound, eddy current, X-ray and γ-ray and other methods to check and judge. Our products exported to north America, Europe,south Africa and other countries. If you have any other question , welcome to visit our website to know more .