Engineered Materials

In response to market demand, APA now offers a series of high value materials, greatly simplifying the supply chain, reducing lead-time and costs.

Aluminum-silicon alloys, containing 20 – 40% silicon, including standard compositions with trace metal additions to increase strength, toughness. All readily machinable, weldable, using conventional techniques. Compatible with standard electroplating and conversion coating processes. Available in bulk form, rough cut to customer specification; standard bars from 0.75” to 4.25” dia, shapes up to 40” on a side. Manufactured in Europe.

Typical Composition

Alloy	Condition	Composition
RSA-431	T6	Al Si30 Cu1,5 Mg1,2 Fe0,4 Ni0,4
RSA-443	AE	Al Si40
RSA-453	AH	Al Si50
RSA-463	AH	Al Si60

Material Properties

Alloy	Density g/cm3	Thermal Expansion 10-6 / K	Stiffness GPa	Specific Stiffness Gpa/g/cc	Thermal Conductivity W/m-K	UTS Mpa	Yield Strength Mpa	Elongation %	Hardness (HB)
RSA-431	2.6	15.5	95	36	120	410	390	1.5	190
RSA-443	2.54	13.6	102	40	135	225	155	1.5	190
RSA-453	2.5	11.6	110	44	130	200	130	1	170
RSA-463	2.47	9.7	117	47	125	200	130	<1	230

Aluminum-silicon carbide metal matrix composites (MMCs), containing 20 – 40% silicon carbide, priced favorably to copper on a volumetric basis. Available in strip and sheet form, up to 18” x 36”, thickness from 0.5 mm to 6 mm. Fabrication techniques include stamping, chemical milling, laser cutting, machining and EDM. Compatible with standard electroplating and conversion coating processes. Manufactured in the United States.

Material Properties

	MMC20	MMC30	MMC40	Al	Mg	Cu	Stainless
SiC Content(vol.%)	20	30	40	0	0	0	0
CTE(ppm/C)	16.4	14.4	12.00	23.8	27	17.5	17
Thermal Conductivity	160	160	180	137	155	390	16.2
Young's Mod (GPa)	100	115	150	70	45	130	193
Ddensity(g/cc)	100	115	150	70	45	130	193
Specific Stiffness	37	41	52	26	26	15	24

Downloadable documents containing data and other important technical information regarding the use of engineered materials. Bookmark this page and visit often. New information added on a regular basis, as details become available.

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