The difference between C-beam and channel steel
The difference between c-beam and channel steel 1. Different concepts C-shaped steel is processed by cold bending of hot rolled plate. It has thin wall and light weight, excellent section performance and high strength. Compared with traditional channel steel, the same strength can save about 30% of materials. The channel steel is produced by hot rolling, directly supplied by the steel plant, and has a large thickness and a groove-shaped long strip.
2023
03-13
The inspection of steel bars firstly checks the label number and quality certificate of the steel bars; secondly, it needs to do visual inspection, take 5% of each batch of steel bars, check that there are no cracks, wounds and laminations on the surface, and the protrusions on the surface of the steel bars must not exceed the horizontal The height of the rib, the depth and height of the defect shall not be greater than the allowable and deviation of the location, and the bending degree of each meter of the steel bar shall not be greater than 4mm; for the next mechanical performance test, if each batch is less than 60 tons, 2 pieces shall be taken from it, each Cut two sections and do tensile and cold bending tests respectively. When cutting the test piece, 100-500mm at both ends of the steel bar should be removed, and the corresponding steel bar should be taken when the test piece is larger than 60 tons. If a test result does not meet the requirements, take another double number of samples from the same batch for each test. If there is still one unqualified sample, the batch of steel bars is unqualified, and the hot-rolled steel bars have brittle fracture, poor welding performance or significantly abnormal mechanical properties during processing, and chemical composition analysis and other special inspections should be carried out.
2023
03-06
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2022
09-22
When the angle steel is deformed, how to correct it
When the angle steel is deformed, twisted and bent, how should we correct it? 1: The small angle steel can be corrected by wrench torsion; the larger angle steel can be placed on the edge of the platform and hit the flange edge of the angle steel in the reverse twisting direction with a hammer;
2022
09-26
The difference between round steel and other steel bars
1. The appearance is different. The round steel has a smooth and round appearance, no pattern and no ribs, and other steel bars have engraved or ribbed appearance on the surface. This results in a small bonding force between the round steel and the concrete, while the other steel bars and concrete have a small bonding force. Great adhesion.
2022
09-09
1. Hot-rolled flat steel is a general-purpose rolled steel with a rectangular cross-section. Its specifications are expressed in millimeters of thickness * width, and flat steel can be finished steel for components, ladders, bridges and fences. Flat steel can also be used as a billet for welding clinging steel and a slab for stacking thin sheets. (Material: Q215, Q235), executive standard: GB704-1988 instead of GB704-83, this standard is applicable to general-purpose hot-rolled flat steel with a thickness of 3~60mm, a width of 10~200mm, and a rectangular cross-section.
2022
09-09