Project Description

The frame material has evolved from the earliest chromium-molybdenum steel to aluminum alloy, and then the use of composite materials such as carbon fiber, as well as scandium alloys, magnesium alloys, titanium alloys, etc.
The chromium-molybdenum steel frame is an alloy steel made by adding one or more elements to carbon steel. The addition of two elements, molybdenum (Mo) and chromium (Cr), is called molybdenum-chromium alloy steel. The role of molybdenum: to increase the strength of steel and prevent temper brittleness. The role of chromium: corrosion resistance, rust resistance, prevent high temperature oxidation. Relatively rare. Before the 1990s, bicycle frames were mainly made of chromium molybdenum steel. It has good torsion and tensile properties, high temperature during welding will not affect the material, and the price is cheap.
Steel is the longest frame material used on bicycles. The main advantages include good rigidity for long-term riding, elastic pipes (shock absorption), multiple pipe joints and good workability, easy welding and no heat treatment, so the cost is relatively low. The price is relatively low. The disadvantage is that the weight is too heavy, improper maintenance is easy to rust, the pipe is not easy to shape, and there is a problem of metal fatigue. However, many alloy steels nowadays have achieved good results in rigidity, elasticity, transmission, and stability. The only drawback is that they are still heavier. Among the steels, chromium-molybdenum steel is the most common, which has high strength and is easy to pipe processing.