DMS series die-cast aluminum alloys are materials developed for high thermal heat sinks in LED thermal backplanes (see Figure 1). According to the test results of Mitsubishi resin, the thermal conductivity is about 2.2 times that of the existing aluminum alloy heat sink material ADC12 on the market. Other characteristics are shown in Table 1.
Table 1 Characteristics of DMS series die-casting aluminum alloy (Note: The data of DMS5 and 6 are the data after tempering heat treatment. Recommended heat treatment conditions: 220 °C × 3 hr)
DMS1 | DMS3 | DMS5 | DMS6 | ADC12 | |
Thermal conductivity (W/m ° C) | 210 | 150 | 150 | 175 | 92 |
Corrosion resistance (mg/dm 2 )/D) | 1.2 | 1.1 | 1.1 | 1.1 | 4.9 |
Tensile strength (N/mm 2 ) | 122 | 170 | 243 | 236 | 270 |
Δ0.2 yield strength (N/mm 2 ) | 122 | 170 | 243 | 236 | 270 |
Expansion rate (%) | 57 | 97 | 165 | 160 | 156 |
Brinell hardness (HB) | 25 | 6 | 4 | 6 | 2 |
Conductivity (IACS%) | 58 | 38 | 38 | 46 | twenty three |
Liquidus temperature (°C) | 657 | 585 | 585 | 615 | 580 |
Solidus temperature (°C) | 655 | 574 | 560 | 560 | 515 |
Density (Mg/m 3 ) | 2.72 | 2.66 | 2.66 | 2.68 | 2.71 |
Linear expansion coefficient (×10-6/°C) | 23.6 | twenty one | twenty one | 22.5 | 21.5 |
Table 2 DM series die-casting aluminum alloy characteristics
DM2 | DM3 | DM5 | DM6 | ADC6 | |
Tensile strength (N/mm 2 ) | 176 | 118 | 127 | 235 | 255 |
Δ0.2 yield strength (N/mm 2 ) | 78 | 49 | 59 | 137 | 118 |
Expansion rate (%) | 16 | 28 | 25 | 7 | 15 |
Brinell hardness (HB) | 48 | 30 | 34 | 58 | 60 |
Liquidus temperature (°C) | 660 | 657 | 659 | 652 | 641 |
Solidus temperature (°C) | 655 | 652 | 655 | 643 | 599 |
Density (Mg/m 3 ) | 2.74 | 2.72 | 2.73 | 2.75 | 2.65 |
Linear expansion coefficient (×10 -6 /°C) | 23.6 | 23.6 | 23.4 | 23.4 | twenty four |
Compared with ADC6 currently on the market, DM series die-cast aluminum alloys have greatly improved anodizing performance and die-casting performance. Its characteristics are shown in Table 2. There are different levels of products to choose from depending on the purpose of the customer. The material's corrosion resistance is suitable for making reels for advanced fishing gear.
As high-quality aluminum alloys have great growth potential in the Chinese market, Mitsubishi Plastics decided to launch the above products in China.
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