noun
Engineering term for a sample or coupon used in material testing, such as tensile or fatigue tests.
引張試験のために金属の試験片を用意した。
We prepared a metal test specimen for the tensile test.
試料 is a broader term for a sample or specimen used in analysis or testing, not limited to mechanical testing.
Compound of 試験 (test) and 片 (piece, fragment).