The inspection of steel pipe generally includes the inspection of geometric dimension and surface quality; Chemical composition, mechanical properties, technological properties, high and low power structure inspection; Non destructive testing; Inspection of some special properties, length measurement and weighing, etc. (1) Geometric dimension inspection of steel pipe The outer diameter, wall thickness, bending and length […]

In summer, the temperature is very hot, there is more rain, and the weather is more muggy and humid after the rain. Under this state, the surface of galvanized products is easy to re-alkali. Therefore, new and old friends, we must know some common sense about the storage of galvanized products in the rainy season! […]

Carbon (C): With the increase of carbon content, the yield point and tensile strength increase, but the plasticity and impact properties decrease. Too high carbon content is easy to cause unqualified intergranular corrosion. The boundary between steel and iron is controlled by C content: < 2.11% is steel.   Silicon (SI): Si is a deoxidizer […]

European Standard EN 10297-1 seamless circular steel tubes for mechanical and general engineering purposes Non-Alloy Steel Tube Chemical Composition Steel Grade C Si Mn P S Other Elements Steel Name Steel No. Min. Max. Min. Max. Min. Max. Min. Max. E235 1.0308 – 0.17 – 0.35 – 1.20 0.030 0.035 E275 1.0225 – 0.21 – […]