User blog comment:Manthila/Adeptus Mechanicus vs Separatist Droid Army/@comment-184.45.92.17-20140508031222/@comment-14624336-20140517075427

After doing some research I found out Thallax armor is based on space marine armor which made from ceramite(high quality) and plasteel

Space marine armor is shown to be able take barrages of lasguns which are powerful enough to blast limbs off turn body water into steam while blasters can only make holes

Tech-thralls also were flak armor which is made from low quality ceremite but still capable of taking a few lasgun hits and Adeptus mechanicus have more intelligent troops