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Comparison of high frequency induction welding with high-frequency resistance welding
High-frequency resistance welding basic principle: a pair of electrodes two leg edge contact with the tube, directly to the edge of the input frequency current tube, using high frequency current of the skin effect and proximity effect, so that the current is highly concentrated in the edge of the...Read more -
Application of Protection coating for reinforced concrete
Changes of concrete alkaline state would destroy the steel surface of the passive film, then there reinforcement the localized corrosion. Corrosion of reinforcement is reinforced concrete structure damage and one of the main causes of early failure. With domestic steel corrosion in concrete struc...Read more -
What is Structural Tubing
Most people don’t even notice structural tubing, but it is an integral part of everyday life for many people. This sturdy alternative to solid steel is used in an impressive array of industries and products, from shopping carts to hand rails to truck bumpers. These tubes come in many shapes...Read more -
Transverse crack weld
Transverse crack weld in weld metal solidification crystallization process produces. Solidification, low melting point eutectic enrichment at the grain boundaries, a “liquid film”, due to the weld solidification shrinkage by tensile stress, eventually cracking the formation of cracks,...Read more -
Thermal Expansion Steel Pipe
Thermal expansion steel pipe means that the density is relatively low, but a strong contraction of the steel pipe, (seamless steel pipe) can be referred to as thermal expansion. Expanded by cross rolling method or methods of pipe diameters drawing a blank pipe finishing processes. In a short peri...Read more -
The pipeline classification and grading
The pipe is coupled into the device for conveying gas, liquid or solid particles in the fluid pipe, pipe couplings and valves. The pipeline project is a very widely used construction technology, occupies an important position in the construction project, the type of pipeline, mainly in the transp...Read more -
Zinc coating thickness
Zinc coating thickness is the surface of the zinc and the total thickness of the zinc alloy coating, expressed in km. Local thickness of the zinc coating, the arithmetic mean of a number of basic measuring surface as required by law the measured magnetic coating thickness measurement or coating m...Read more -
Carbon steel pipe welding
Generally, carbon steel pipe has a good welding ability. carbon steel pipe welding means a metal material in some welding under the process conditions, the ability to obtain high-quality welded joints. As long as the right choice for mild steel, welding materials (electrodes) and the welding proc...Read more -
ASTM A519 for Seamless Carbon and Alloy Steel Mechanical Tubing
The standard and specification covers carbon and alloy steel seamless mechanical tubing. The tubes shall be furnished in the following shapes, as specified by the purchaser:round, square, rectangular, and special sections. Heat analysis An analysis of each heat of steel shall be made by the steel...Read more -
In May, China exported 5.743 million tons of steel.
According to the data of the General Administration of Customs on June 10, China exported 5.743 million tons of steel in May 2019, a decrease of 583,000 tons from the previous month, a decrease of 9.22% from the previous month and a decrease of 16.5% from the same period...Read more -
The rainy season is coming, steel prices are weak
Since late May 2019, the rebar futures contract of 1910 has fluctuated downwards. The price of iron ore futures also declined slightly, but the decline was much smaller than that of rebar futures. The industry believes that the downstream demand for steel will be weakene...Read more