Origin of species ZTiAl6V4 99 domestic brands ZTiAl6V4 titanium content (%) impurities 1 (%) Grade Code main components (mass fraction) (%) Ti (titanium) Al (aluminum) Sn (tin) Mo (molybdenum) V (vanadium) Nb (niobium) ZTi1 ZTA1 yl - - - - - ZTi2 ZTA2 yl - - - - - ZTi3 ZTA3 yl - - - - - ZTiAl4 ZTA5 group 3.3 ~ 4.7 - - - - ZTiAl5Sn2.5 ZTA7 yl ~ 6.0 2.0 ~ 4.0 3.0 - - - ZTiAl6V4 ZTC4 base 5.5 ~ 6.8 - - 3.5 ~ 4.5 - ZTiMo32 ZTB32 base - - 30.0 ~ 34.0 - - ZTiAl6Sn4.5Nb2Mo1.5 ZTC21 base of 5.5 to 6.5 4.0 to 5.0 1.0 - 2.0 - 1.5 - 2.0 Impurities grades code impurity components ( mass fraction) (%), ≤ Fe (iron) Si (silicon) C (carbon) N (nitrogen) H (hydrogen) O single sum (oxygen) other elements ZTi1 ZTA1 0.25 0.10 0.10 0.003 0.015 0.25 0.10 0.40 ZTi2 ZTA2 0.30 0.15 0.10 0.05 0.015 0.35 0.10 0.40 ZTi3 ZTA3 0.40 0.15 0.10 0.05 0.015 0.40 0.10 0.40 ZTiAl4 ZTA5 0.30 0.15 0.10 0.04 0.015 0.20 0.10 0.40 ZTiAl5Sn2.5 ZTA7 0.50 0.15 0.10 0.05 0.015 0.20 0.10 0.40 ZTiAl6V4 ZTC4 0.40 0.15 0.10 0.05 0.015 0.25 0.10 0.40 ZTiMo32 ZTB32 0.30 0.15 0.10 0.05 0.015 0.15 0.10 0.40 ZTiAl6Sn4.5Nb2Mo1.5 ZTC21 0.30 0.15 0.10 0.05 0.015 0.20 0.10 0.40 Note: 1. Other elements of the single impurity content and the total consideration only if there are objections to the analysis. 2. When impurities have special requirements, shall be approved by both parties after consultation indicated in the relevant documents. 2. 2.1 chemical composition of cast titanium and titanium alloy chemical composition shall conform to Table 1. Other elements 2.2 in Table 1 refers to trace element impurities in the casting production process inherently present, generally include AL, V, Sn, Mo, Cr, Mn, Zr, Ni, Cu, Si, Nb, Y (the grade alloying elements contained should be removed). 2.3 Analysis of the chemical composition of the sample was cut in the cast or cast test bars, allowing the runner cut. Chemical analysis of the sample must be clean, not mixed with foreign matter and without casting surface. 2.4 chemical analysis conducted by GB4698. GB4698 elemental analysis did not include consultation by both parties. 2.5 effective bits chemical analysis report values ??in Table 1 is consistent significant digits corresponding limit values. Rounding numerical analysis conducted by GB8170. 2.6 chemical composition of demand-side analysis reinspection component tolerances shall comply with the provisions of Table 2. Table 2 provides the chemical composition range of elements,% tolerance,% Al 3.3-6.8 ± 0.40 Sn 2.0-3.0 4.0-5.0 ± 0.15 ± 0.25 Mo 1.0-2.0 30.0-34.0 ± 0.30 ± 0.40 V 3.5-4.5 ± 0.15 Nb 1.5-2.0 ± 0.15 Fe> 0.20-0.25> 0.25-0.40> 0.40-0.50 +0.05 +0.08 +0.15 Si ≤0.15 +0.02 C ≤0.10 +0.02 N ≤0.05 +0.02 H ≤0.015 +0.03 O ≤0.20> 0.20-0.25> 0.25-0.40 +0.04 +0.05 +0.08 other impurity elements the sum of the individual ≤0.10 +0.02 ≤0.40 +0.05