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Low thermal expansion aluminium alloy sheets

4045 / 4045 aluminium

4045 coefficient of linear expansion (our data, measured by an external organization)

Measurement Conditions

Measurement Method:Thermo-mechanical analysis (TMA)

Heating Rate: 5℃/min

Temperature Range:20℃～100℃

Measuring Atmosphere:He gas

Results

Temperature Average Coefficient of Linear Expansion
℃ ×10⁻⁶ 1/℃
40 20.3
60 20.4
80 20.5
100 20.6

Mechanical Properties

4045　Sheet Thickness：2mm　Actual Values (Example)

Tensile Strength
(N/m㎡)		 Elongation
(%)
H18 200 4.5
H24 138 20.0
0 125 33.0

Characteristics Comparison

1050
H24		 5052
H34		 4045
H24		 ST60
T8
Thermal Conductivity W/mk 230 137 190 211
Density g/c㎥ 2.71 2.68 2.69 2.70
Specific J/kgK 900 900 877 900
Electrical Conductivity IACS IACS(%) 61 35 50 56
Coefficient of Thermal Expansion 10E⁻⁶*K⁻¹ 23.6 23.8 20.6 23.4
Poisson's Ratio 0.33 0.33 0.33 0.33
Young's Modulus kN/m㎡ 69 69 69 68
Tensile Strength N/m㎡ 110 260 140 260
Offset Yield Strength N/m㎡ 105 215 120 235
Shear Strength 10⁷kg/m㎡ 70 145 85 150
Elongation % 10 16 10 8
Hv Hardness 31 68 43 80
  • The values for 1050 and 5052 are quoted from the Aluminum Handbook, and from materials from the Japan Institute of Light Metals
  • There is no official data for 4045, so we used measurement data and analogous values from our 4045
  • The values for ST60 are quoted from 6063 data from the Japan Institute of Light Metals, as well as our data

Contact Information

Marketing Department, Sheet Product Group
(Tokyo) 03-5843-6055(Osaka) 072-225-2911

*The data shown on this page and in the attached files are representative values, not guaranteed values.

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