， 本文主要讨论EN 10113/1-1993可焊接细晶粒结构钢热轧产品的化学成分和力学性能。
The EN 10113/1-1993 standards specify the chemical composition and mechanical properties of hot rolled weldable fine grain structural steel products. This standard is applicable to hot rolled and heat treated products, which are intended for general engineering and structural use as defined in technical standard EN ISO 683/1-2013. In this article, the chemical composition, mechanical properties and range of application of EN 10113/1-1993 are discussed in detail.
Chemical Composition
EN 10113/1-1993 specifies the chemical composition requirements for four grades of hot rolled weldable fine grain structural steel. Grade S275, S355, S420 and S460 are all specified with a maximum C content of 0.20%. S275 is further specified with a maximum Mn content of 1.50%, whereas the same for the other three grades is 1.60%. Nitrogen content is also specified for the four grades, and is limited up to 0.012%, 0.014%, 0.011% and 0.012% for S275, S355, S420 and S460, respectively. The standard also specifies the maximum of various other alloying elements such as Cu, Cr, Ni, Mo, P, Ti, Sn and V.
Mechanical Properties
The mechanical properties for the four grades of hot rolled weldable fine grain structural steel specified by EN 10113/1-1993 are listed in Table 1. At room temperature, the minimum specified yield strength ranges between 275 N/mm^2 and 460 N/mm^2. For elevated temperatures, the minimum specified yield strength ranges between 275 N/mm^2 and 420 N/mm^2. The mechanical properties of the four grades at elevated temperatures are specified in terms of the reference temperature, which is 100°C.
Range of Application
The mechanical properties of hot rolled weldable fine grain structural steel specified in EN 10113/1-1993 are suitable for use in low temperature applications. Generally, these grade of steel is used in construction of bridges, ships, buildings, railway cars, and pressure vessels. The steel may also be used for general engineering applications subjected to quenching and tempering to meet the requirement for higher mechanical strength. They may also be considered for applications where the welding process is not a significant factor.
In conclusion, EN 10113/1-1993 is an important European standard for the determination of chemical composition and mechanical properties of hot rolled weldable fine grain structural steel products. The standard specifies a very low C content, as well as various alloying elements, to provide the optimal mechanical properties for the steel. The grades of steel specified in this standard have a wide range of applications in low temperature applications.
