Hollow Structural Steel Tube
Size:20*20-500*500mm or as the requirement，
large size steel tube above 500*500 can be produced.
Thickness:1.3-40mm or as the requirement
Length:5.8m/6m/12m or as the requirement
Description
Product Specification
Size | 20*20-500*500mm or as the requirement， large size steel tube above 500*500 can be produced. |
Thickness | 1.3-40mm or as the requirement |
Length | 5.8m/6m/12m or as the requirement |
Technique | ERW, SSAW, LSAW, galvanized, etc. |
Steel grades | ASTM A500, ASTM A501, EN10219, EN10210, JIS G3466, CSA G40.21 50W / 350W, AS 1136, AH36, DH36, ASTM A572 Gr50 , ASTM A513, etc. |
Application | Bridge Shipbuilding Steel Structures i.e. Airports, Facotry Workshop, Metro Station, etc. |
Package | in the bundle, or wrapped with waterproof cloth as per the customers' requirement |
Delivery Time | 5-10 days if stock is available; 20-25 days for new production |
Loading Port | Xingang, Tianjin, China |
MOQ | 10 tons |
1. All the pipes are high-frequency welded. 2. Both inner and outer welded stabs can be removed. 3. Pipe can be necked down and punched holes. 4. Supplying BV or SGS Inspection if the client needs it. | |
Influence of major alloying elements:
1. Sulfur: Sulfur can easily lead to thermal cracking of welds, resulting in many pores and looseness in the welded metal, which will have a negative impact on the welding performance of steel.
2. Phosphorus: Phosphorus improves the tensile strength of mild steel, and the higher the carbon content, the greater the brittleness caused by phosphorus. Adding phosphorus to ordinary steel, especially copper-containing steel, has obvious anti-atmospheric corrosion effects. Phosphorus can increase the sensitivity of welding cracks and affect the welding performance of steel.
3. Manganese: It is a good deoxidizer and is desulfurized in steel smelting. It can eliminate or weaken the hot embrittlement of steel caused by sulfur, thereby improving the hot workability of steel. However, the ductility of steel is reduced
4. Silicon: It is a good reducing agent and deoxidizing agent. With the increase in silicon content, the elastic limit and yield strength of steel are significantly improved, which reduces the cold-formability of steel. The affinity between silicon and oxygen is stronger than that of iron, and it is easy to generate silicate with a low melting point during welding, which improves the fluidity of slag and molten metal, causing serious spattering and affecting the quality of welds.
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