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Bike Racks Highest Density

Runva Enterprises Limited | Updated: Aug 11, 2017

Frame material from the earliest chrome-molybdenum steel, Bike Racks evolution to aluminum alloy, and then the use of composite materials such as carbon fiber, and other scandium alloy, magnesium alloy, titanium alloy, etc., the industry has been developing new material formulations, Bike Racks improve pipe and structural design capabilities and innovative processing technology, just to make the frame lighter, stronger, more comfortable and more streamlined. Density is one of the key factors determining the weight of the frame, the lower the density, Bike Racks the lighter the frame can be, the density of CR-Mo Steel is 7.9, the aluminum alloy is 2.6-2.9, titanium 4.5, titanium alloy 4.3-5.1, carbon fiber composite 1.6, magnesium alloy 1.7, it is the highest density of CR-Mo Steel, the lowest carbon fiber composite material. However, in addition to the weight of the frame, Bike Racks but also to consider the tensile strength, elastic coefficient, so although the density is low, but not enough strength.

Generally speaking, the rigidity of the frame depends on the elasticity coefficient of the material, the steel's elasticity coefficient is 30, the aluminum is 10-11, Bike Racks and the titanium 15-16.5, so when the pipe diameter, wall thickness, the rigidity of the aluminum frame only the steel frame of one-third, titanium frame rigidity also only steel frame one-second. The strength of the frame is determined by the yield strength of the material, Bike Racks the yield strength and the quality of the frame tube, heat treatment process and alloy components have a great relationship. Aluminum's yield point is only 11-59, titanium 40-120, steel 46-162, Bike Racks compared to the lower aluminum is more fragile and easy to damage. In actual design, each frame of pipe diameter will determine the stiffness of the frame, strength and weight, pipe thickness will also affect the frame strength and weight. One of the most suitable design of the frame in some places to emphasize rigidity, some places to intensity, some places to absorb earthquakes, Bike Racks so must be in different parts of the functional appeal of the appropriate materials, and the combination of different materials technology is also a big test frame industry.

Steel is used in the bicycle the longest frame material, the main advantages include the long ride of the rigidity of the good, pipe flexible (shock), Bike Racks pipe bonding and processing, Bike Racks easy to weld and do not need heat treatment, so the cost and price is relatively low. The disadvantage is heavy weight, maintenance is not easy to rust, pipe shape is not easy and metal fatigue problem. However, today many alloy steel has been in the rigidity, elasticity coefficient, transmission, stability has been very good effect, Bike Racks the only ointment is still heavy weight. CR-Mo Steel is the most common in steel, its strength is high and it is easy to be drawn. Molybdenum can increase the strength of steel, prevent the return of brittleness, Bike Racks chromium can make steel corrosion resistance, rust and prevent high-temperature oxidation. Many of the proponents of hand-steel truck are most recommended is its excellent sense of road and suitable for long-distance ride comfort advantages, as steel pipe Glutton said: "Steel pipe is permanent, a forever spread!" "Suitable for use in BMX unexpectedly technology vehicle,Bike Racks  long-distance station wagon with truck."

Aluminum alloy is the most widely used material in the market, the advantage is light weight, short time hardness and rigidity performance is best, shape processing is easy, will not rust, to light can be thin tube, strong can also use CNC mold cutting to make exaggerated external and amazing intensity. The disadvantage is that almost no elasticity can be said, will accumulate metal fatigue, but also because of its Ning Min lightweight, high rigidity characteristics, it is easy to convey the vibration of the ground, resulting in poor ride comfort. Bike Racks Aluminum alloy frame In early 1990 began to popular, after 1995 began to popularize, the general frame more than 6061 and 7005 aluminum alloy material. Aluminum alloy suitable for racing, enduro and downhill car. The great Technical center points out that compared with the AL7005, there are stress corrosion and welding hot crack, Bike Racks the AL6061 is stable in use and process, but the heat treatment is more complex.

Because of the inherent toughness of the steel frame, the rebound response speed and reaction force are much better than those of aluminum frame.