Sample number	Non-metallic inclusion									Tissue	Grain size (level)
	A		B		C		D		The sum of inclusions	Tissue	Grain size (level)
	Thin	Thick	Thin	Thick	Thin	Thick	Thin	Thick
Failed tubing	0.5	0	0.5	0	0	0	1.0	0	2.0	Sround	10.0
Intact tubing	0.5	0	0.5	0	0	0	0.5	0	1.5	Sround	10.0