... carbon, hydrogen, iron, oxygen, aluminum, vanadium, tin, ruthenium, palladium, cobalt, molybdenum, chromium, nickel, niobium, zirconium, silicon, and titanium. For sheet and ... vanadium, 0.5 % iron, 0.3 % silicon),33 Grade 36—Titanium alloy (45 % niobium),34 Grade 37—Titanium alloy (1.5 % ... aluminum), and35 Grade 38—Titanium alloy (4 % aluminum, 2.5 % vanadium, 1.5 % iron).Note 1—H grade material is ...