They are combinations of the other matieral groups. / Hulle is kombinasies van die ander matierale groepe.

Metals can be alloyed to have a large range of strengths. / Metale kan geallooi word om 'n groot verskeidenheid sterkte te hê.

Alloys, such as steels, can be subjected to different heat treatments to obtain a range of strengths. / Allooie, soos staal, kan aan verskillende hittebehandelings onderwerp word om 'n reeks sterke te verkry.

Densities are generally low for this group of materials. / Die digtheid is oor die algemeen laag vir hierdie groep materiale.

Large cost ranges are related to large variability of metals/alloys availability, ease of fabrication and cost-effective processing techniques. / Groot reeks kostes hou verband met die groot veranderlikheid van die beskikbaarheid van metale/allooi, vervaardigingsgemak en koste-effektief verwerkingstegnieke.