Product Application

• Radar circuit housings for radar communications

 

Selectable Silicon Aluminum(Si/Al) Alloys

• AlSi40(Al-40%Si controlled expansion alloy)

 

Alternative Material

• Iron;
• Copper-molybdenum(Cu-Mo);

• Ferritic stainless steel.

 

Main Characteristics:

• Advanced CTE(i.e AlSi50 housing,AlSi60 carrier)match to circuitry in radar communications;

• High thermal conductivity;

• Ease of machining and plating(laser welded with Ni/Au);

• Good hermetically;

• Dimensional stability;

• Dispensed with Cu-Mo heat sinks required in radar communications.

 

AlSi Alloys Performance Parameters

 

Content wt%	Density   g/cm³	CTE  25℃ ppm/℃	Thermal  Conductivity 25℃ W/mK	Tensile  Strength  MPa	Yield  Strength    MPa	Poisson’s  Ratio	Elongation %	Elastic  Modulus  GPa
Al-27%Si	2.6	17	175	170	130	0.29	3.8	91
Al-42%Si	2.55	13.5	143	200	187	0.29	1	105
Al-50%Si	2.5	11.5	140	200	210	0.28	<1	108
Si-40%Al	2.46	9	125	181	181	0.27	<1	121
Si-30%Al	2.43	7.5	120	138	138	0.25	<1	131
Si-20%Al	2.40	6	110	125	125	--	--	132

Content	Density    g/cm³	CTE    ppm/℃	Thermal      Conductivity   W/mK	Tensile  Strength MPa	Yield  Strength  MPa	Poisson’s Ratio	Elongation   %	Elastic Modulus   GPa
BEW 6061	2.7	22.6	210	312	270	0.33	12.5	69
BEW 4047	2.66	21.6	193	208	129	0.33	18	70