6151 metal aluminum alloy

6151 metal aluminum alloy was born in the United States in the mid-1930s, and its prototype 6051 aluminum alloy was listed as a very useful alloy by the Aluminum Association of America on December 12, 1963, and there are five other commonly used alloys of this type: 6151, 6351, 6351A, 6451 and 6951 aluminum alloys. Except for 6351A, which is a French alloy, all the others are American alloys. These alloys have a wide range of applications in military armaments, and are used to make crankcase forgings and rolled rings, mines and machine forgings. All parts that require good forging properties, high strength and good corrosion resistance can be machined with this alloy. Until 1954, it was known as 51S in the United States, and in 1954 it was designated as 6151 aluminum alloy.

Aluminum plate sheet

Chemical composition of 6151 metal aluminum alloy

6151 aluminum plate in chemical composition, 6951 alloy Si content is the lowest, only equivalent to about 35% of other alloys, so its strength properties should be the lowest, but it contains 0.15% Cu - 0.40% Cu, while other alloys do not contain Cu, so their mechanical properties are almost no big difference.

Mechanical properties of 6151 metal aluminum alloy

6151 aluminum plate without low temperature brittleness, can be used to process parts working at very low temperature, tensile strength Rm=330N/mm2, yield strength Rp0.2=298N/mm2, elongation A=17% at 25℃, when the temperature drops to 200℃, the properties rise comprehensively, reaching 395N/mm2, 345N/mm2, 20% respectively. 6151 aluminum plate of Operating temperature should not exceed 120℃.

Physical properties of 6151 metal aluminum alloy

Density of type 6151 alloy at 20℃ 2700kg/m3; liquid phase line temperature 649℃, solid phase line temperature 588℃, average linear expansion coefficient of -50℃ - 20℃ 21.8μm/(m-k), 20℃ - 100℃ the average linear expansion coefficient of 23.0&μm/(m-k), 20℃-200℃ the average linear expansion coefficient of 24.1μm/(m-k), 20℃-300℃ the average linear expansion coefficient of 25.0μm/(m-k).
Isovolume conductivity of 6151 aluminum sheet at 20°C: 54% IACS for O state material, 42% IACS for T4 state, 45% IACS for T6 state.

Resistivity at 20°C: 32nΩ-m for the O state material, 41nΩ-m for the T4 state, 38nΩ-m for the T6 state; specific heat capacity at 20°C 895J/(kg-K).

Thermal conductivity at 20℃: 205W/(m-k) for O state material, 163W/(m-k) for T4 state; 175W/(m-k) for T6 state.

The potential of 6154 aluminum plate in a solution containing 53 g NaCl/L + 3 g H2O2/L at 25°C is -0.83 V for a 0.1 N glycerol electrode.

Process characteristics of 6151 metal aluminum alloy

6151 aluminum plate annealing specification 413 ℃ / 2h - 3h to no more than 27 ℃ / h cooling rate with the furnace cooling to 260 ℃, and then out of the furnace air cooling. Solution treatment temperature (510 ℃ - 525 ℃) / 4min, room temperature quenching in water, large forgings at 65 ℃ - 100 ℃ quenching in water. Artificial aging specification (165℃--175℃)/(8h--12h). Heat processing temperature 260℃--480℃.