ASTM B338 Grade 18

Chemical Properties

Nitrogen, max	Carbon, max	Hydrogen,B,Cmax	Iron, max	Oxygen, max	Aluminum	Vanadium	Residuals,D,E,Fmax each	Residuals,D,E,Fmax total	TitaniumG

Note B: Lower hydrogen may be obtained by negotiation with the manufacturer. Note C: Final product analysis. Note D: Need not be reported Note E: A residual is an element present in a metal or an alloy in small quantities and is inherent to the manufacturing process but not added intentionally. In titanium these elements include aluminum, vanadium, tin, chromium, molybdenum, niobium, zirconium, hafnium, bismuth, ruthenium, palladium, yttrium, copper, silicon, cobalt, tantalum, nickel, boron, manganese, and tungsten. Note F: The purchaser may, in his written purchase order, request analysis for specific residual elements not listed in this specification. Note G: The percentage of titanium is determined by difference.

Mechanical Properties

Tensile Strength, min, ksi [Mpa]	Yield Strength, 0.2% Offset		Elongation in 2 in., min %
	min ksi[Mpa]	max ksi[Mpa]

Note A: ksi = 1000 psi. Note E: Elongation for welded tubing manufactured from continuously cold rolled and annealed strip from coils for Grades 9, 12, and 18 will be 12 %.

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