corrosion resistance
corrosion resistance can be used to differentiate the two metals. These two metals do not contain iron, so they do not rust easily. Copper oxidizes over a period of time to form a green patina. This prevents further corrosion of the copper metal surface. However, brass is an alloy of copper, zinc, and other elements that also resist corrosion. To sum up, brass has a more golden color and greater corrosion resistance compared to copper.
Conductivity
The conductivity differences of various metals are often not understood. However, assuming the conductivity of one material because it looks similar to another conductive material of known capacity can be catastrophic for the project. This error is somewhat apparent in the substitution of brass for copper in electrical applications. By contrast, copper is the conductivity standard for most materials. These measures are expressed as relative measures of copper. This means that copper has no resistance and is 100% conductive in an absolute sense. Brass, on the other hand, is an alloy of copper and its conductivity is only 28% of that of copper.
thermal conductivity
Thermal conductivity of a material is simply a measure of its ability to conduct heat. This thermal conductivity varies from metal to metal, so it must be taken into account when the material needs to be used in high temperature operating environments. The thermal conductivity of pure metals remains constant with increasing temperature, while the thermal conductivity of alloys increases with increasing temperature. In this case, copper is a pure metal, while brass is an alloyed metal. In comparison, copper has the highest conductivity at 223 BTU/(hrft. F), while brass has a conductivity of 64 BTU/(hrft. F).
melting point
The melting point of a metal is critical to the selection of engineering materials. This is because, at the melting point, component failure can occur. When a metallic material reaches its melting point, it changes from solid to liquid. At this point, the material can no longer perform its function. Another reason is that metals are easier to form when they are liquid. This will help to choose the best formability between copper and brass that a project needs. In metric terms, copper has a melting point of up to 1084°C (1220°F), while brass has a melting point of 900°C to 940°C. The melting point range of brass is due to different elemental compositions.
hardness
The hardness of a material is its ability to resist local deformation, which may come from the indentation of a predetermined geometric indenter on a metal plane under a predetermined load. As a metal, brass is stronger than copper. In terms of hardness index, the hardness of brass ranges from 3 to 4. On the other hand, copper has a hardness of 2.5 - 30 on the wire harness diagram and brass is a product of the different compositions of copper and zinc. The higher the zinc content, the better the hardness and ductility of the brass.
weight
When comparing the weight of metals, water can be chosen as the baseline for specific gravity - given a value of 1. The specific gravity of the two metals is then compared as a fraction of the heavier or lighter density. After doing so, we found that copper was the heaviest, with a density of 8930 kg/m3. On the other hand, the density of brass varies from 8400 kg/m3 to 8730 kg/m3 depending on its elemental composition.
Durability
Durability of a material refers to the ability of a material to remain functional without undue repair or maintenance when faced with normal operational challenges during its half-life. The two metals exhibited nearly identical levels of durability in their respective projects. However, copper exhibits the greatest flexibility compared to brass.
machinability
The machinability of a material refers to the ability of the material to be cut (machined) to obtain an acceptable surface finish. Machining activities include cutting, cutting, die casting, etc. Processability can also be considered in terms of materials of manufacture. In comparison, brass is more machinable than copper. This makes brass ideal for applications that require a great level of formability.
Formability
Copper has exceptional formability, best described by its ability to produce micron-sized wire with minimal softening annealing. In general, the strength increase of copper alloys such as brass is proportional to the nature and amount of cold work. Commonly used forming methods include die casting, bending, drawing and deep drawing. For example, the casing brass reflects the deep-drawing characteristics. Essentially, copper and brass-copper alloys exhibit exceptional formability, but copper is highly flexible compared to brass.
Weldability
Copper is easier to solder than brass. However, all brass alloys are solderable except those containing lead. In addition, the smaller the zinc content in brass, the easier it is to weld. Therefore, brass with a zinc content of less than 20% has good weldability, and brass with a zinc content of more than 20% has better weldability. In the end, cast brass metal can only barely be welded. As mentioned earlier, lead-tin brass alloys are not solderable. Exposure to high welding heat, high preheat and slow cooling rates must be avoided.
Yield Strength
Yield strength is considered the maximum stress at which a material begins to deform permanently. In the comparison of copper and brass, brass has a higher yield strength than copper. To support this claim, the brass component 34.5 is as high as 683 MPa (5000 - 99100 psi), while the copper component is 33.3 MPa (4830 psi).
ultimate tensile strength
The ultimate tensile strength of a component or material is its maximum strength against fracture. Brass is harder and stronger than copper, so it is more prone to stress cracks. This explains why the ultimate tensile strength of brass is lower, but can be increased depending on the elemental composition. The ultimate tensile stress of copper is 210 MPa (30500 psi). Brass, on the other hand, has an ultimate tensile strength range of 124 - 1030 MPa (18000 - 150000 psi).
Shear strength
Shear strength is the strength of a material against yielding or structural failure types, especially when the material fails in shear. In this case, a shear load is a force that causes sliding failure of a material or member along a plane parallel to the direction of the force. When measured, it is clear that brass has the highest shear strength (35,000 psi - 48,000 psi), while brass has the lowest shear strength (25,000psi).
