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SMA490AW steel flat bar, Large diameter spiral steel pipe refers to the relatively large diameter spiral steel pipe, which is generally required to be more than 1000mm. The manufacturing process of large-diameter spiral steel pipe: first, the steel strip is bent into shape, and then welded together to make a large-diameter spiral steel pipe of specified size. After being processed into a pipe, hydrostatic test, bending, flattening and other tests shall be carried out, and the internal steel support of large-diameter spiral steel pipe can be made according to customer requirements.
Chemical composition of SMA490AW steel flat bar, Q420qENH steel plate:Carbon C: not more than 0.11, silicon Si: 0.15-0.50, manganese Mn: 1.10-1.50, niobium Nb: 0.01-0.1, vanadium V: 0.01-0.1, titanium Ti: 0.006-0.03, chromium Cr: 0.40-0.70, nickel Ni: 0.30-0.40, copper Cu: 0.25-0.50, molybdenum Mo: not more than 0.20, nitrogen N: not more than 0.008.
Our company's logistics breaks through the perspective that the center of transportation service is ability, and emphasizes that the purpose of transportation service is customer first. Customer demand determines the content and mode of transportation service, while production is often small batch, diversified and consumer demand tends to be diversified. In the case of personalization, our logistics service also provides personalized service projects.