The density and specific heat of low alloy structural steel for welding constructions. Physical and mechanical properties.
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Buy at an affordable price of the manufacturer low-alloy structural steel, designed for the manufacture of welded structures, offers the company Elektrovek-steel. The supplier provides prompt delivery of rolled metal to the address specified by the customer.
Composition and performance characteristics
In industry and construction, low-carbon, low-alloy steels are widely used. In these steels, the total percentage of alloying elements (without carbon) is usually in the range of 2… 4%, with the carbon content e not exceeding 0.25… 0.30%.
According to the presence of alloying elements, the steels of the group under consideration are divided into the following groups:
With a high content of manganese;
With an increased content of silicon and manganese;
With increased content of chromium, nickel, silicon and manganese.
The mandatory presence of manganese in the chemical composition of these steels is explained by the fact that this element increases the index of impact strength and resistance to brittle failure at low temperatures, without reducing the ability of the steel to weldability. Manganese steels also give welded increased strength when subjected to dynamic and shock loads. In most grades of low alloy structural steels with increased weldability, up to 0.25… 0.30% copper is present. Copper gives the steels of this group an increased resistance to corrosion processes, especially if they occur in an environment with high humidity.
The cost price for the output of these steels is also low because the production of rolled blanks is provided by hot rolling technology. After stamping, such steels are subjected to heat treatment, and with increasing thickness of rolled steel, the mechanical properties of steels increase more intensively. The threshold of cold brittleness, on the contrary, decreases.
The company Electrovek-steel offers to purchase at affordable prices from the manufacturer of rolled low-alloy structural steels, featuring increased weldability. The supplier guarantees timely delivery of the products to any point set by the customer.
For welding, the heat conductivity λ values of the steels in question and their linear expansion α in welding are of particular importance, which determines the accuracy of the finished structure. These characteristics are not constant values, but depend on temperature, which is reflected in the following table:
|steel grade||Α10 6, 0 С -1||Λ, W / m 0 С|
|In the temperature range, 0 С|
|20… 100||20… 200||20… 300||20… 400||20… 500||100||200||300||400|
Buy at a bargain price from the manufacturer of rolled low-alloy structural steels with increased weldability offers the company Elektrovek-steel. The supplier ensures timely delivery of products to the address specified by the consumer.