GB/T 13304 Low Alloy Steel By Main Performance and Use Characteristics
Low alloy steel is a kind of steel with low alloy content. It is different from alloy steel due to its relatively low level of alloy. GB/T 13304 standard specifies the physical and mechanical properties and use characteristics of low alloy steels. Low alloy steels have high strength, atmospheric corrosion resistance, and they are extensively used in bridge construction, pressure vessels, and manufacturing of cutting tools.
Thickness: Depending on the application, low-alloy steel is available in thicknesses from 0.25 mm to 2.50 mm.
Tensile strength: Low-alloy steels can have a maximum tensile strength of up to 75,000 psi, or about 650 to 700 MPa. This is much higher than most structural steels, which range in tensile strength from 35,000 to 48,000 psi.
Yield Strength: Low-alloy steels typically have a yield strength of between 35,000 and 45,000 psi, or about 250 to 300 MPa. This is slightly lower than the standard structural steel, which range in yield strength from 36,000 to 45,000 psi.
Elongation: Low-alloy steel generally has an average elongation of between 6 and 8%.
Impact Resistance: Low-alloy steels can have an impact resistance of up to 18 Joules, which is significantly higher than most structural steel, which has impacts resistance ranging from 10 to 15 Joules.
Corrosion Resistance: Low-alloy steel is resistant to corrosion, which makes it suitable for a number of applications. Despite its corrosion resistance, it is important to note that low-alloy steel can be affected by some environmental factors, such as high temperatures, exposure to certain chemicals, and humid environments.
Machinability: Low-alloy steel is considered to be an excellent material for machining, as it has good machinability properties. Its high toughness, combined with its ductility, makes it ideal for a number of machining operations.
Weldability: Low-alloy steel is considered to be a good choice for welding, particularly when welding with shielded metal arc welding, gas metal arc welding, and gas tungsten arc welding processes.
Low-alloy steel is a versatile material that can be utilized in a number of different application areas. It has become increasingly popular in recent years due to its strength, impact resistance, and corrosion resistance properties. GB/T 13304 standard specifies the physical and mechanical properties, and use characteristics of low alloy steels. Low alloy steel can be used in a number of different applications, such as bridge construction, pressure vessels, and high impact tools.
