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Home > Steel Structure Products > Steel stuctures
Steel structure processing
Steel structure processing Steel structure processing Steel structure processing

Steel structure processing

Delivery time: 15-30days
Price term：EXW,FOB,CIF,CFR,CNF,etc.
Payment：L/C,T/T,Western Union,etc.
Port Delivery：Qingdao, Shanghai, Tianjin, Shenzhen,etc.
We can provide customized products in different materials and sizes to meet different needs.
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Description
Description

The application of steel structure is very extensive. As one of the main building structures, it is often used in large workshops, venues, etc. The steel structure material needs to be preheated during processing. Preheating can reduce the restraint of the welded steel structure, especially the restraint of the fillet joint. With the increase of the preheating temperature, the incidence of cracks decreases.

 

Main steel structure
(columns and beams)		 1.Steel Q345(S355JR) or Q235(S235JR) H shape
2. Straight cross-section or Variable cross-section
Sub steel structure 1.Material Q235(S235JR) steel
2.Bolt connections. Anti-rust painted or galvanized
3. Brcaings:X-type or V-type or other type bracing made from angle, round pipe, etc
4. Purlins:C or Z type: Size from C120~C320, Z100~Z200
Roof Sandwich panel(PU/EPS/fiberglass/rook wool) or Colorful steel tile
Wall Sandwich panel(PU/EPS/fiberglass/rook wool) or Colorful steel tile
Doors Steel rolling shutter or others
Windows Alu. Alloy window,or others
Edge Cover Steel sheet 0.5mm thinckness
Bolts M24,M22,M16 embedded bolts,intensive bolts,galvanized ordinary bolts,high-strength bolts, etc
Others options Daylighting panel,Roof ventilator,Down pipe,Galvanized,Crane,sanitary Products, etc
Foundation Cement and steel foundation bolts

 

 

 
 
Steel structure processing
Preheating reduces welding stress in steel structures. Uniform local preheating or overall preheating can reduce the temperature difference (also known as temperature gradient) between the workpieces to be welded in the welding area. In this way, on the one hand, the welding stress is reduced, and on the other hand, the welding strain rate is reduced, which is beneficial to avoid welding cracks.
 
 

 

 
 
Preheating can slow down the cooling rate after welding, which is conducive to the escape of diffusible hydrogen in the weld metal and avoids hydrogen-induced cracks. At the same time, the degree of hardening of the weld and the heat-affected zone is reduced, and the crack resistance of the welded joint is improved.
 
The uniformity of the preheating temperature in the thickness direction of the steel sheet and the uniformity in the weld zone have an important influence on reducing the welding stress. If the steel structure is preheated unevenly, it will not reduce the welding stress, but will increase the welding stress.
 

 

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