"main material for" is correct and usable in written English.
It is used to describe something that a certain thing is made of or composed of. For example, "This necklace is made of silver, which is the main material for this type of jewelry."
The main material for her jewelry is Plexiglas, and her palette is Crayola rich and bright.
The sediment of the Taiwan Shihmen Reservoir was used as the main material for sintering specimen.
Timber is used as a main material for constructions of buildings, bridges and towers.
The ITER fusion project has selected the stainless steel 316LN as main material for the magnet structure.
Solyndra and Evergreen in particular suffered because they pursued unusual technologies whose competitiveness depended on their using less polysilicon, the main material for solar panels.
Until now, China has tended to pursue retaliatory trade actions against industrial products, including imports of polycrystalline silicon, the main material for solar panels.
Many oleaginous microorganisms can accumulate lipids, especially triacylglycerols (TAGs), which are the main materials for biodiesel production.
The main materials for tunnel linings are cast-in-place concrete lining, precast segmental concrete lining, steel plate linings and shotcrete lining.
The main materials for household biogas plants are livestock manure, human excreta and agriculture residues, among which livestock manure (pig or cow) plays a crucial part in biogas generation (Bond and Templeton 2011; Kabir et al. 2013).
21 In anaemia, the main materials for haemoglobin synthesis are iron and protein.
For the main material of the posts, we opted for carbon fiber because it was easy and stable.
