Spring Steel (GB/T1222-1984)
Spring steel, also known as high-strength carbon-manganese steel, is an ultra-high strength steel used for engineering applications. It is often used in the form of dual-phase micro-alloyed steel, which is manufactured using precise forging processes to ensure uniform properties. Spring steel is available in many different grades, ranging from higher strength grades with better fatigue properties to low carbon grades with increased toughness.
High-strength spring steel (GB/T1222-1984) is an ultra-high strength steel used in engineering applications. It is often used in the form of dual-phase micro-alloyed steel, which is manufactured to have extremely small grain size and uniform properties over the entire plate. This micro-alloying technique gives the steel the ability to retain high strength at elevated temperatures and more resistance to wear and tear compared to conventional steels. It is used in applications such as automotive parts, blades, furnace components and other high-strength applications.
Spring steel is typically of low-carbon steel, and is often alloyed with manganese, chromium, or molybdenum. Manganese has a large influence on the properties of the steel and is often used for increased wear and tear resistance. Chromium increases the corrosion resistance of the steel and molybdenum adds additional hardness to the material. The steel can also contain other metals such as vanadium, cobalt, or tungsten.
Spring steel is available in a variety of tempers, typically from annealed to full hard. This determines the hardness of the material. The harder the material, the higher its yield strength and fatigue resistance. The lower the temper, the more ductile the material will be in response to heat and cold. The hardness of the steel is also affected by the type of heat treatment used when manufacturing the product.
Spring steel is used in a variety of applications, including automotive parts, blades, furnace components, and other high-strength applications. It also has applications in agricultural equipment, mechanical seals, and valves, as well as in the power and metalworking industries. The steel can also be used in other applications where high strength and fatigue resistance are important.
For these applications, spring steel must meet the standard GB/T1222-1984, which is a published Chinese national standard that defines the requirements and testing methods for spring steel. The standard covers the physical and chemical composition, mechanical properties, and other quality requirements of the material. It also covers the testing methods for testing the tensile strength and yield strength of the material. Testing methods for hardness, fatigue resistance and elongation are also included.
Spring steel has become a popular material for high-stress engineering applications because of its superior mechanical properties, strong wear and tear and corrosion resistance, and its ability to retain high strength at elevated temperatures. In order to ensure that the steel meets the required standard GB/T1222-1984, quality tests have to be performed during production to verify its mechanical properties. If the steel does not pass the tests, then it is not suitable for use in engineering applications.
