Aluminum/Titanium Comparison

Aluminum alloy Aluminum alloy Titanium Alloy

Property 7075-T6 (ww-T-700) drawn tubing 7075-T6; 7075-T651 Grade 5 Ti6Al4V % Different

Source Casing.xls Matweb Matweb  

Yield Strength (Mpa) 455 503 1103 219.28%

Ultimate Strength (Mpa) 531 572 1172 204.90%

E (Gpa) 71.76 71.76 113.85 158.65%

0.33 0.33 0.33  

Density (g/cc)   2.81 4.43 157.65%

Melting Temp (oC)   477 1600 335.43%

Thermal Conductivity (W/m-K)   130 6.7 5.15%

Specific Heat (J/g-K)   0.96 0.5263 54.82%

Mass Calculation

Short GrainHTPB Mass(kg) N2O Vol (m^3) N2O Vol (m^3) Structure Mass Allowable (10:2)

Multiplier 6 8 6 8

1.5 0.01144 0.01526 2.1 2.7

1.55 0.01182 0.01576 2.17 2.79

1.6 0.01220 0.01627 2.24 2.88

1.65 0.01259 0.01678 2.31 2.97

1.7 0.01297 0.01729 2.38 3.06

1.75 0.01335 0.01780 2.45 3.15

Long GrainHTPB Mass(kg) N2O Vol (m^3) N2O Vol (m^3) Structure Mass Allowable (10:2)

Multiplier 3 6 3 6

2.5 0.00953 0.01907 2 3.5

2.55 0.00973 0.01945 2.04 3.57

2.6 0.00992 0.01983 2.08 3.64

2.65 0.01011 0.02021 2.12 3.71

2.7 0.01030 0.02059 2.16 3.78

2.75 0.01049 0.02098 2.2 3.85

Mass CalculationChalice Design, 7075-T6 Al

240mm OD, 1.75mm Thickness, FS 1.25

Short GrainLow Height (cm) Low Mass (g) % All. Mass High Height (cm) High Mass (g) % All. Mass

26.05 973 46.32% 33.72 1259 46.65%

26.91 1005 46.32% 34.85 1301 46.65%

27.78 1038 46.32% 35.97 1343 46.65%

28.65 1070 46.32% 37.09 1385 46.65%

29.52 1102 46.32% 38.22 1427 46.65%

30.39 1135 46.32% 39.34 1469 46.65%

Long GrainLow Height (cm) Low Mass (g) % All. Mass High Height (cm) High Mass (g) % All. Mass

21.70 811 40.53% 42.15 1574 44.98%

22.14 827 40.53% 43.00 1606 44.98%

22.57 843 40.53% 43.84 1637 44.98%

23.01 859 40.53% 44.68 1669 44.98%

23.44 875 40.53% 45.52 1700 44.98%

23.88 892 40.53% 46.37 1732 44.98%

Mass CalculationEmbedded Outer Shell Design, 7075-T6 Al

180mm OD, 61mm ID, 1.3mm Thickness, FS 1.25

Short GrainLow Height (cm) Low Mass (g) % All. Mass High Height (cm) High Mass (g) % All. Mass

51.67 1075 51.19% 65.18 1356 50.23%

53.21 1107 51.02% 67.17 1398 50.10%

54.76 1139 50.86% 69.17 1439 49.97%

56.30 1171 50.71% 71.17 1481 49.86%

57.84 1203 50.57% 73.17 1522 49.75%

59.39 1236 50.43% 75.17 1564 49.65%

Long GrainLow Height (cm) Low Mass (g) % All. Mass High Height (cm) High Mass (g) % All. Mass

43.75 910 45.51% 82.17 1710 48.85%

44.62 928 45.51% 83.67 1741 48.77%

45.50 947 45.51% 85.17 1772 48.68%

46.37 965 45.51% 86.67 1803 48.61%

47.25 983 45.51% 88.17 1834 48.53%

48.12 1001 45.51% 89.67 1866 48.46%

Mass CalculationEmbedded Inner Shell Design, Grade 5 Titanium

61mm OD, 0.5mm Thickness

Short GrainLow Height (cm) Low Mass (g) % All. Mass High Height (cm) High Mass (g) % All. Mass

45.50 192 9.12% 45.50 192 7.09%

45.50 192 8.83% 45.50 192 6.87%

45.50 192 8.55% 45.50 192 6.65%

45.50 192 8.29% 45.50 192 6.45%

45.50 192 8.05% 45.50 192 6.26%

45.50 192 7.82% 45.50 192 6.08%

Long GrainLow Height (cm) Low Mass (g) % All. Mass High Height (cm) High Mass (g) % All. Mass

63.00 265 13.26% 63.00 265 7.58%

63.00 265 13.00% 63.00 265 7.43%

63.00 265 12.75% 63.00 265 7.29%

63.00 265 12.51% 63.00 265 7.15%

63.00 265 12.28% 63.00 265 7.02%

63.00 265 12.06% 63.00 265 6.89%