How many types of steel are there

 How many types of steel are there

　　Steel is not a single product. There are currently more than 3,500 different types of steel with varying physical, chemical and environmental properties.

　　About 75% of the steel in use today was developed in the past 20 years. To rebuild the Eiffel Tower today, engineers would only need a third of the steel.

　　A new type of steel used in modern cars is stronger than before, yet weighs 35 percent less than before.



评论

发表评论

此博客中的热门博文

Protection against steel corrosion

图片
 Protection against steel corrosion In actual engineering, there are three main methods of protection against steel corrosion. 1) Protective film method The protective film is used to isolate the steel from the surrounding medium, thereby avoiding or slowing down the damaging effect of the external corrosive medium on the steel. Such as spraying paint, enamel, plastic, etc. on the surface of steel; or using metal plating as a protective film, such as zinc, tin, chromium, etc. 2) Electrochemical protection method According to the specific cause of corrosion, it is divided into no-current protection method and applied current protection method. The no-current protection method is also called the sacrificial anode method. It is to connect a metal that is more active than steel on the steel structure, such as zinc and magnesium. Because the potential of zinc and magnesium is lower than that of steel, zinc and magnesium become the anode of the corrosion battery. to damage (sacrificial a...
阅读全文

The latest ranking of the world's major steel producing countries

图片
The latest ranking of the world's major steel producing countries The World Iron and Steel Association announced the latest ranking of the world's 40 major steel-producing countries (regions) in 2022. China ranked first with 1.013 billion tons of crude steel production (a year-on-year decrease of 2.1%), and India (124.7 million tons, a year-on-year increase of 5.5%) ranked first. Second, Japan (89.2 million tons, down 7.4% year-on-year) ranked third, the United States (80.7 million tons, down 5.9% year-on-year) ranked fourth, and Russia (71.5 million tons, down 7.2% year-on-year) ranked fifth . In 2022, global crude steel production will be 1.8785 billion tons, a year-on-year decrease of 4.2%. According to the ranking, among the world's top 40 steel-producing countries (regions) in 2022, 30 countries' crude steel production will decline year-on-year. Among them, in 2022, Ukraine's crude steel production will drop by 70.7% year-on-year to 6.3 million tons, the larges...
阅读全文

Indefinite length (usually length）

图片
  Indefinite length (usually length) 　　Where the product size (length or width) is within the range specified by the standard and does not require a fixed size, it is called indeterminate. Indeterminate length is also called normal length (pass length). For metal materials delivered in irregular lengths, as long as they are delivered within the specified length. For example, for ordinary round steel not greater than 25mm, its usual length is specified as 4-10m, and round steel with a length within this range can be delivered.
阅读全文