Alloy properties:

C18665 copper-magnesium alloy has good electrical conductivity and strength, excellent stress relaxation resistance, excellent stress corrosion cracking resistance, and excellent fatigue properties. It can be processed by reflow tin plating and has excellent surface quality and anti-whisker performance. Its use has attracted much attention and can be used for high-voltage terminals (electric vehicles and plug-in hybrid vehicles), relays (movable parts), contact spring materials, busbars, circuit breakers, battery terminals, fuse terminals, compact switches, conductive parts in lithium-ion batteries, junction boxes and relay boxes.

Chemical composition:

Copper (Cu): Balance

Magnesium (Mg): 0.4-0.7%

Phosphorus (P): ≤0.01%

Physical properties:

Density g/cm ³

8.8

Elastic modulus GPa

120-130

Thermal expansion coefficient x10 ^-6 / ℃

17.3

Electrical conductivity%IACS

60

Thermal conductivity W/(m · k)

264

Mechanical properties:

Bending properties

state

Vickers hardness HV

Tensile test

90 ° R/T(Thickness < 0.5mm）

Tensile strength MPa

Yield strength MPa

Elongation %(A ₅₀ )

Good way

Bad way

H01(1/4H)

90-140

360-450

340-410

≥15

--

--

H02(1/2H)

120-170

420-510

370-480

≥10

0

0

H04(H)

150-190

480-570

400-550

≥7

0

0.5

H06(EH)

170-210

540-630

490-620

≥15

0.5

1.5

H08(SH)

≥180

≥590

≥540

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