What are the advantages of using embossed aluminum for the shell of Apple mobile phone?

Embossing aluminum material is a kind of processing technology that forms various patterns or patterns on the surface of aluminum material under the action of pressure. At present, it is not clear whether Apple's mobile phone shell adopts this process design. However, some models of Apple's mobile phones use aluminum casings, which have many advantages. Here are some details for you:

Excellent physical performance

The advantages of lightweight are obvious: the density of aluminum is about 2.8 g/cm, which is much lower than that of titanium alloy (about 4.43 g/cm). Under the same volume, the aluminum case can significantly reduce the weight of mobile phones. For example, the iPhone 17 Pro uses an aluminum body, which is about 18% lighter than the titanium alloy model, ending the ridicule of the Pro series "half-catty machine", making it easier for users to carry it, and it is not easy to feel tired when holding it for a long time.

High structural strength: Apple chooses high-performance aluminum alloy materials, such as "Super Aeronautical Aluminum Ultra" alloy adopted by iPhone 17 Pro, and injects 1.2% scandium and 0.8% zirconium into traditional aviation aluminum, with a yield strength of 480MPa, which is 15% higher than that of titanium alloy. At the same time, through the Unibody process, such as the integration of the middle frame of iPhone 17 Pro and the camera boss, the stress concentration points at the joints are reduced, so that the gap of the fuselage is reduced by 70%, and the bending performance is 37% higher than that of titanium, which improves the overall structural strength and deformation resistance of the mobile phone case.

Excellent heat dissipation: the thermal conductivity of aluminum alloy is high, reaching 180 W/(MK), which is 31 times that of titanium alloy (5.8 W/(MK)). This feature enables the aluminum case to quickly conduct the heat generated by the internal processor and other components of the mobile phone to the outside, which, together with the vapor chamber system, can effectively reduce the temperature of the mobile phone under high load. For example, in the high-load game scene of iPhone 17 Pro, the core temperature of SoC can be reduced by 4.2℃, and recording 8K video for a long time will no longer trigger overheating protection, thus ensuring the stable output of mobile phone performance.

Unique appearance design

Various styles and advanced texture: aluminum has excellent coloring ability. Through anodizing and other processes, Apple can create a variety of colors for aluminum shells, and the colors are durable and stable, which can meet the individual needs of different users. At the same time, the metal material itself has a unique luster and texture. After fine processing, the aluminum shell can present a simple and high-end visual effect and improve the overall grade of the mobile phone.

Technological innovation enhances recognition: Apple constantly innovates in the processing of aluminum shell. For example, the camera area on the back of iPhone 17 Pro is directly cut into rectangular bosses, and there is no need to attach additional glass modules. Apple Logo has moved to the center of the magnetic attraction ring like never before; The ultra-wide rectangular camera module almost traverses the fuselage, and these unique designs make the appearance of the mobile phone very recognizable, which is different from other brand models.

Good practical performance

Strong impact resistance: aluminum has good toughness and impact resistance. When the mobile phone is accidentally dropped, the aluminum shell can absorb part of the impact force, which is less likely to break compared with materials such as glass backboard, greatly reducing the risk of screen or fuselage backboard rupture. For example, the 2-meter drop test by a third-party testing organization shows that the aluminum body structure of iPhone 17 Pro reduces the peak impact force by 53%, and the pass rate of drop test increases from 68% to 92%.

Improved waterproof performance: The integrated aluminum body design reduces the gaps in the body. For example, the Unibody technology of iPhone 17 Pro reduces the gaps in the body by 70%, and the waterproof level may jump to IP69, which can effectively prevent water and dust from entering the inside of the mobile phone and improve the use safety of the mobile phone in complex environments.

Environmental protection and cost advantage

Better environmental protection: the energy consumption of aluminum alloy recycling is 67% lower than that of titanium alloy, and it can be recycled 100% in closed loop. By improving the anodic oxidation process, Apple can reduce the emission of harmful substances in wastewater by 90%, and reduce the carbon footprint of each device by 28kg CO₂ equivalent, which is in line with Apple's environmental protection goal of achieving zero net emission of the whole product and supply chain in 2030, and also reflects the sense of social responsibility of enterprises.

The advantages of cost and mass production are obvious: the machinability of aluminum is far superior to that of titanium and other materials, and its CNC/anode system is extremely mature in 3C industry, which means that it is easier to control the cost and production yield of aluminum shell in mass production. Compared with titanium, which is difficult to cut, fast to wear, and poor in thermal conductivity, aluminum can improve production efficiency and reduce production costs, thus ensuring product quality and being more conducive to product marketing.