Aluminum sheet grade for insulation?

ZL101 is characterized by a simple composition, ease of melting and casting, good casting properties, excellent airtightness, as well as good weldability and machinability; however, its mechanical properties are not high. It is suitable for casting various parts with thin walls, large surfaces, and complex shapes, where high strength is not required, such as pump housings, gearboxes, instrument casings (frames), and components used in home appliances. Sand casting and die casting are primarily used. Zl101A, which incorporates a trace amount of Ti on the basis of ZL101, refines the grain structure and strengthens the alloy’s microstructure; as a result, its overall performance is superior to that of ZL101 and ZL102. It also possesses good corrosion resistance, making it suitable as high-quality castings for engineering components subjected to normal loads, as well as for various structural parts in motorcycles, automobiles, home appliances, and instrumentation products. Its usage is currently second only to ZL102. Mold casting and die casting are commonly used. The main advantage of the Zl102 alloy is its good fluidity; its other properties are similar to those of ZL101, but it has better airtightness than ZL101. It can be used to cast die-cast parts with complex shapes and thin walls, as well as metal or sand-cast parts that are large in area, have complex shapes, and do not require high strength. Whether it is die-cast parts or metal mold or sand-cast parts, this is the most commonly used type of cast aluminum alloy in consumer products. Zl104 has good casting properties, as well as excellent airtightness and corrosion resistance, thanks to its high content of crystalline structure and the addition of Mn, which counteracts the harmful effects of Fe present in the material. It also exhibits good weldability and machinability, although its heat resistance is poor. It is suitable for manufacturing power-related components with complex shapes and large sizes that are subject to heavy loads, such as turbocharger housings, cylinder heads, and cylinder liners. It is primarily produced through die casting, but sand casting and metal casting are also commonly used. Due to the addition of Cu, Zl105 and ZL105A have a reduced silicon content; as a result, their casting and welding properties are inferior to those of ZL104. However, their strength at room temperature and at high temperatures, as well as their machinability, are better than those of ZL104. Their plasticity is slightly lower, and their corrosion resistance is poor. Suitable for use as power structural components with complex shapes, large sizes, and high loads. Parts such as the turbocharger housing, cylinder head, cylinder liner, etc. Zl105A features a reduced content of the impurity element Fe in ZL105, which enhances the strength of the alloy; it possesses better mechanical properties than ZL105 and is often used to produce high-quality castings. Due to the increased silicon content and the addition of trace amounts of Ti and Mn, ZL106 exhibits better casting properties and high-temperature performance than ZL105. It also has improved airtightness and corrosion resistance, making it suitable for use as structural components under normal loads, as well as for parts that require good airtightness and can operate at high temperatures. It is primarily manufactured using sand casting and die casting methods. ZL107 possesses excellent casting and airtightness properties, as well as good mechanical properties. Its weldability and machinability are average, while its corrosion resistance is somewhat poor. It is suitable for manufacturing structural components that are subject to normal dynamic or static loads, as well as parts that require airtightness. Sand casting is commonly used. ZL108: Due to its high silicon content, along with the addition of Mg, Cu, and Mn, this alloy possesses excellent casting properties. It also has a low thermal expansion coefficient, good wear resistance, high strength, and decent heat resistance. But its resistance to etching is slightly lower. Suitable for manufacturing pistons for internal combustion engines, as well as other parts that require wear resistance and those that need consistent dimensions and volume. Die casting and die-casting are primarily used, while sand casting can also be employed. ZL109 is a complexly alloyed Al-Si-Cu-Mg-Ni alloy; the increased silicon content along with the addition of Ni confer on it excellent casting properties and gas-tightness, as well as high strength at high temperatures. Its wear resistance and corrosion resistance are also improved, while its linear expansion coefficient and density are significantly reduced. It is suitable for manufacturing internal combustion engine pistons and other components that require wear resistance along with stable dimensions and volume. Metal mold casting and sand mold casting are mainly used. ZL111 is a complexly alloyed material; the addition of Mn and Ti endows it with excellent casting properties, good corrosion resistance and airtightness, as well as high strength. Its welding and cutting properties are average. Suitable for casting power components with complex shapes that are subject to heavy loads (such as components of aircraft engines, water pumps, oil pumps, impellers, etc.), where good airtightness and operation at high temperatures are required. Metal casting and sand casting are primarily used, with die casting also being an option. ZL114A and ZL112 are complexly alloyed metals; the addition of Mn and Ti endows these alloys with excellent casting properties, good corrosion resistance and airtightness, as well as high strength. Its welding and cutting properties are average. Suitable for casting power components with complex shapes that are subject to heavy loads (such as components of aircraft engines, water pumps, oil pumps, impellers, etc.), where good airtightness and operation at high temperatures are required. Metal casting and sand casting are primarily used, with die casting also being an option. ZL115 has good casting properties and high mechanical properties, and is mainly used for engineering components under heavy loads as well as other parts such as valve housings and impellers. Mold casting and die casting are primarily used. ZL116 features the removal of Zn and Sb from the ZL115 alloy, along with the addition of two trace elements, Ti and Be, which helps to refine the grain structure of the alloy and reduce the harmful effects of Fe. As a result, the alloy exhibits good casting properties, airtightness, and high mechanical strength. It is suitable for casting power structural components that are subject to heavy loads, such as certain parts in aircraft and missiles, as well as various parts in consumer products that require good overall performance. It is mainly cast using sand molds and metal molds. The ZL117 alloy is a complexly alloyed Al-Cu-Mg hypereutectic wear-resistant alloy. Due to its Si content of 19–22%, along with trace amounts of elements such as Mn and rare earth elements RE, the alloy becomes a high-grade wear-resistant material featuring many highly hard primary Si particles dispersed in a soft matrix. It also possesses excellent casting properties, good strength at both room temperature and high temperatures, and a low coefficient of thermal expansion. Suitable for casting internal combustion engine pistons, brake pads, and other structural components that require wear resistance, dimensional stability, and high strength. It is mainly cast using die casting, but sand casting can also be used. In addition, the Aviation Industry Ministry has also developed three aluminum-silicon alloys (ZL112Y, ZL113Y, ZL117Y). Both ZL112Y and ZL113Y are Al-Si-Cu die-casting alloys; they possess excellent casting properties, airtightness, and high mechanical strength. They are suitable for manufacturing parts that require high strength and operating temperatures as well as good airtightness. They can also be used for other parts such as pistons, which need wear resistance, stable dimensions and volume, and good heat transfer properties. Die casting is primarily used, but sand casting and die casting can also be employed. Unlike the Zl108 alloy, its Si content has been reduced while the Cu content, which contributes to solid solution strengthening and precipitation hardening, has been increased; as a result, its properties at room temperature and at high temperatures are better than those of Zl108. ZL201 possesses good mechanical properties at room temperature and high temperatures; its plasticity is average, and its weldability and machinability are also average. However, it has poor fluidity, a tendency to develop thermal cracks, and weak corrosion resistance. It is suitable for casting structural components that operate at higher temperatures (200–300°C), parts that are subjected to large dynamic or static loads at room temperature, as well as parts that function at low temperatures (-70°C). Sand casting is commonly used. The ZL201A alloy **has reduced levels of impurities such as Fe and Si, and it possesses higher mechanical properties at room temperature and at high temperatures compared to ZL201.** It has good machinability and weldability, but poor castability. It can be used for parts that operate at 300°C or for parts that are subjected to large dynamic or static loads at room temperature. Sand casting is commonly used. ZL202 has good casting properties, as well as high strength, hardness, and wear resistance at high temperatures; however, its corrosion resistance is poor. It is suitable for casting parts with a working temperature of 250°C and low loads, such as cylinder heads. Sand casting and die casting are mainly used. ZL203 has a slightly poorer fluidity due to the reduced silicon content; it tends to crack at high temperatures and has poor corrosion resistance. However, it possesses good high-temperature strength as well as excellent weldability and machinability. It is suitable for casting parts that are subjected to low loads at working temperatures below 250°C, as well as parts that experience high loads at room temperature, such as instrument components and crankcase housings. Sand casting and low-pressure casting are commonly used. ZL204A is a high-purity, high-strength cast Al-Cu alloy that also possesses good plasticity as well as excellent weldability and machinability, but its casting properties are poor. Suitable for casting structural components under heavy loads, such as support bases, arms, and other parts. Sand casting and low-pressure casting are commonly used. ZL205A is currently the aluminum alloy with the highest strength in the world. It has good plasticity and corrosion resistance, as well as excellent machinability and weldability, but its castability is relatively poor. Suitable for casting structural components that bear heavy loads and some parts with low requirements for airtightness. Sand casting and low-pressure casting are primarily used, while die casting can also be employed. ZL207 has very high high-temperature strength. Its castability is average, and its weldability and machinability are also average, but its strength at room temperature is not high. Suitable for casting various structural components that operate at a temperature of 400°C. Such as valve housings on aircraft engines, and some heat-resistant components in the oil refining industry. Sand casting and low-pressure casting are commonly used. The tensile strength, yield strength, and high-temperature strength of the ZL209 alloy are all higher than those of ZL201A; it also has better welding and machining properties, but its casting properties and elongation are inferior. Suitable for casting various components that require wear resistance when operating at high temperatures, such as parts in internal combustion engines. Sand casting is commonly used. ZL301 is the alloy with the strongest corrosion resistance among existing aluminum alloys. It has good machinability, fairly good weldability, high strength, and excellent anodizing properties. However, its casting process is complex and cumbersome, and the castings are prone to defects such as porosity and thermal cracking. Sand casting is commonly used for manufacturing various parts that are subject to high loads in corrosive media such as seawater, where the casting temperature is around 150°C; examples include various components within marine vessels, pump casings, impellers, frames, and other parts used in the oil industry. ZL303 has better high-temperature strength than ZL301, good corrosion resistance (slightly worse than ZL301), superior machinability, good weldability, and better casting properties than ZL301; however, it cannot be heat-treated, which results in mechanical properties that are much lower than those of ZL301. Suitable for casting parts such as aircraft engines, missiles, internal combustion engines, chemical pumps, oil pumps, petrochemical gas pump casings, rotors, and blades that are exposed to corrosive media like seawater, chemicals, and gases, and must withstand moderate loads. Pressure casting and sand casting are mainly used. ZL305: Due to the addition of Zn and a reduced magnesium content, its casting properties as well as the structural stability after natural aging are superior to those of ZL301 and ZL303 alloys, with a lower tendency to develop porosity and thermal cracking. Furthermore, the addition of the two trace elements Ti and Be results in good overall properties for this alloy, as well as strong resistance to stress corrosion; however, its mechanical properties are poor at high temperatures. Suitable for casting parts such as pump casings, rotors, and blades that are designed to bear heavy loads and operate in corrosive media such as seawater, chemicals, and gas at temperatures below 100°C, in applications related to aircraft, internal combustion engines, chemical pumps, oil pumps, and petrochemical gas pumps. Sand casting is primarily used. ZL401 has excellent casting properties, with low tendencies to shrinkage cavities and thermal cracking. It possesses high mechanical properties, as well as good weldability and machinability. However, it has a high density, low plasticity, and poor corrosion resistance. It is commonly used as structural components in die-casting and molds, templates, as well as in products such as aircraft, internal combustion engines, and vehicles where the operating temperature does not exceed 200°C and moderate loads are applied. Die casting is primarily used, as well as sand casting and die casting.

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After saying all this, which grade is the most commonly used or the most cost-effective?