Like many industrial markets, the heavy truck market utilizes brass fittings for a variety of applications. Brass fittings have the strength, corrosion resistance and machinability in a variety of shapes and sizes to provide cost-effective solutions; making them an ideal material for many truck applications. It is common to find brass fittings in the air brake systems, cab controls, fuel systems, engine, transmission, cooling and air tanks on a heavy-duty truck and they meet DOT and SAE requirements. Let’s take a deeper look into why brass is an ideal material for this market.
Brass is comprised of approximately 60 percent copper, 38 percent zinc, and 2 percent lead. Brass fittings are characterized by their strength and ability to handle high as well as reasonably cold temperatures. They have good conductivity, excellent corrosion resistance, and low magnetic permeability. Brass not only is easy to machine, but it has great plating, joining, polishing and finishing characteristics all packed into a relatively low cost material for manufacturing.
A forged brass fitting is made from an extruded round bar that is cut to length and straightened. After straightening, the bars are cut into slugs, much like a fitting from extruded bar stock, but at this point, rather than machining, the slugs are reheated to a pliable state and pressed under approximately 25,000 pounds of pressure per square inch between an upper and lower die cavity into the desired fitting shape. After cooling, the flash, or excess, is trimmed away and the forging blank is ready for machining
The forged fittings produce a uniformly dense material of exceptional strength from forming under extreme pressure. Since the grain flow follows the contour of the fitting shape, the fitting has high impact strength and resistance to mechanical shock and vibration. You can easily spot the difference between a brass forging and an extruded part by looking at it. A forging will have rounded edges characteristics of the forged shape from the die and an extruded part will have squared off corners that resemble the original bar stock they originated from. Finished brass fittings are forged, then machined to drawing’s specifications.
Need such brass fittings for your truck? Pls contact CFS Forge!