... materials CO.,LTD holds Tantalum ,Niobium as the dominant products in the scope of rare metal new materials, including many sorts ... Outside diameter, inch (mm)Diameter tolerance, inch(mm), +/- Permissible variaton in wall thickness, %, +/- <1 (25.4)0.004 (0.102) 10 1 ... strength δbpsi (MPa), ≥ Yield strength δ0.2, psi (MPa),≥ Elongation in 1"/2" gage length, %, ≥ RO5200/RO5400 30000 (207)20000 (138 ...