MATERIAL USED FOR FABRICATION OF CHASSIS

5.1 MATERIAL USED FOR FABRICATION OF CHASSIS

For any product in manufacturing, the material using for making the product must meet the design specifications and must withstand all the odds that come across its application and operations. The integrity of a design can be ensuring only after a systematic material section procedure. Otherwise, the result it is high susceptible for failure. The great design my fail in the actual working in environment when the appropriate material is not selected so there are several areas where selection of material is inevitable but it is becoming even important in this highly competitive industrial arena.

ERW PIPES

ERW i.e. electric resistence welded carbon in making the chassis part. This pipes were chosen because of the high weight to strength ratio and these pipes make up a light robust base for the chassis.

ERW(electric resistence welding) pipes are manufactured by cold forming of steel coil into a round cylinder shape. In the initial times it was done with the low frequency A.C current to heat the edges. Now ,pipes are made using the low frequency process changed to high frequency A.C current to produce a higher quality weld. ERW pipes have various applications like fencing, line pipe, scaffolding etc. ERW steel pipes are available in various diameters, wall thickness, finish and grades.

ERW is made of very fine hard steel. While manufacturing ERW steel pipes, only high quality, continuous-cast, fully skilled, control-rolled, fine grain, low –carbon steel is used. High performance ERW steel pipe are tubing posses high strength corrosion resistence, high deformability, high strength and high toughness.

The ERW is mainly composed of mild steel that makes the component strong enough to withstand all sorts of vibrations, shocks, and sudden impact loads. Though by nature mild steel is not fragile that causes hassles on al long run.

PIPE SPECIFICATIONS

The ERW pipes used in making chassis has following specifications:-

Material	Mild steel
Grade	316L
Thickness	3mm
Diameter	3.81cm
Shape	Round
Ovality	Max 1%
Surface pattern	Plane
Tensile strength	485 M.pa
Yield point	170 M.pa
Elastic modulus	193 G.pa
Hardness	192 (brinell), B90 (rockwell)
Elongation percentage	20
Length of each pipe	3.65 mts
Weight of each pipe	12 kg