Steel grades and chemical composition

using 10,20,35,45 steel pipe manufacture, its chemical composition should be consistent with the provisions GB/T 699.

Steel by melting ingredients acceptance. When the demand side, demand for the product analysis, it should be indicated in the contract. Finished steel chemical composition deviation should be allowed to comply with the provisions GB/T 222.

According to the demand side requirements, the two sides of supply and demand for other brands of high-quality carbon steel and alloy steel pipe structure.

Manufacturing methods

steel smelting plant by choice.

Round tube should be consistent with the provisions of editing 5222. Cold finished steel pipe manufacturing or cold. Need designated one way of manufacturing steel, it should be indicated in the contract.