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This site mc21inc.com has the following in the homepage, "MC-21 offers the most advanced, yet cost effective Al-SiC in the world." We noticed that the website also stated " With very fine particle reinforcement, MC-21 Al-SiC MMC has excellent mechanical and thermal properties with the added benefit of reduced machining costs." It also stated " With the capability of rolling MMC, MC-21 can provide large quantities of MMC rolled sheet and plate at very economical prices. Squeeze casting or investment casting allows for high volume production of complex shapes from MC-21 MMC ingots." The header had mmc metal matrix composite as the highest ranking keyword. It was followed by al-sic alsic aluminum silicon carbide and high stiffness light weight low cte which isn't as ranked as highly as mmc metal matrix composite.