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News 7. 7. 10:
Surplus Titanium Sheet Grade 2 ASTM F 67
» Titanium Grade 5
This alpha-beta alloy is the workhorse alloy of the titanium industry. The alloy is fully heat-treatable in section sizes up to one inch, and is used up to approximately 400° C (750°F). Since it is the most commonly used alloy - over 50 per cent of all alloy grades melted are a sub-grade of Ti-6-4 - its applications span many turbine and airframes and also several industrial applications.
The addition of 0.05% palladium, (Grade 24) increases corrosion resistance in reducing acid chloride and sour environments.
» Ti6Al4V ELI Grade 5 (former Grade 23)
The essential difference between Ti 6Al 4V ELI and Ti6Al4V (tial6 4, 6al 4v) is the reduction of oxygen content to 0.13% max in ELI. This confers improved ductility and fracture toughness, with some reduction in strength. ELI has been widely used in fracture critical airframe structures and for offshore tubulars. Work is continuing to optimize mechanical properties through processing and heat treatment. Grade 25 is identical to Grade 5 with the addition of 0.05% Pd and 0.3 - 0.8% Ni.
Composition
Physical Data
Mechanical Data
Fabrication Information
» Composition
| C | < 0.08 % |
| Fe | < 0.25 % |
| N2 | < 0.05 % |
| O2 | < 0.2% |
| Al | 5.5 - 6.75 % |
| V | 3.5 - 4.5 % |
| H2 (sheet) | < 0.015 % |
| H2 (bar) | < 0.0125 % |
| H2 (billet) | < 0.0100 % |
| Ti = | Rem |
» Physical Data
| Minimum | Typical | |
| Density g/cm3 (lb/cu.in) | 4.43 (0.159) | |
| Melting Range °C+/-15°C (°F) | 1649 (3000) | |
| Specific Heat J/g/°C | 0.56 | |
| Volume Electrical Resistivity µohm.cm (µohm.in) | 170 (67) | |
| Thermal Conductivity W/mK(Btu/ft h°F) | 7.2 (50) | |
| *Mean Thermal Exp. Coeff. 0-100°C/°C | 8.8 x 10 -6 | |
| *Mean Thermal Exp. Coeff. 0-300°C/°C | 9.2 x 10 -6 | |
| Beta Transus °C+/-15°C(°F) | 999 (1830) |
» Mechanical Data
| Minimum | Typical | |
| Tensile Strength MPa(ksi) | 897 (130) | 1000 (145) |
| 0.2% Proof Stress MPa(ksi) | 828 (120) | 910 (132) |
| Elongation over 2 Inches % | 10 | 18 |
| Reduction in Area % | 20 | |
| Elastic Modulus GPa(Msi) | 114 (17) | |
| Hardness Rockwell C | 36 | |
| Specified Bend Radius <0.070" x Thickness | 4.5 | |
| Specified Bend Radius >0.070In x Thickness | 5 | |
| Welded Bend Radius x Thickness | 6 | |
| Charpy, V-Notch Impact J(ft Ibf) | 24 (18) | |
| Rod, 16 mm diameter | ||
| Tensile Strength (Anneal 700°C/2h) MPa(ksi) | 980(142) | |
| Tensile Strength (954°C/1h, WQ + 595°C/2h) MPa(ksi) | 1110 (161) | |
| 0.2% Proof Stress (Anneal 700°C/2h) MPa(ksi) | 970 (141) | |
| 0.2% Proof Stress (954°C/1h, WQ+595°C/2h) MPa(ksi) | 1070 (155) | |
| Elongation On 25 Mm (Anneal 700°/2h) | 14.5 % | |
| Elongation On 25 Mm (954°C/1h, WQ + 595°C/2h) MPa (ksi) | 14.5 % | |
| Reduction in Area (Anneal 700°C/2h) | 46 % | |
| Reduction in Area (954°C/1h, WQ + 595°C/2h) | 49 % | |
| Extrusion, type: alpha - beta, web section | ||
| Tensile Strength (longitudinal) MPa(ksi) | 976 (142) | |
| Tensile Strength (transverse) MPa(ksi) | 1015(147) | |
| 0.2% Proof Stress (longitudinal) MPa (ksi) | 871 (126) | |
| 0.2% Proof Stress (transverse) MPa(ksi) | 934 (135) | |
| Elongation On 5D (longitudinal) | 19 % | |
| Elongation On 5D (transverse) | 15 % | |
| Reduction In Area (longitudinal) | 42 % | |
| Reduction in Area (transverse) | 46 % | |
| Fracture Toughness (T-L, longitudinal) MPa.m1/2 (ksi.in1/2) | 65 (59) | |
| Fracture Toughness (L-T, transverse) MPa.m1/2 (ksi.in1/2) | 62(56) | |
| Bar 75 mm diameter | ||
| Tensile Strength (Annealed 700°C/2h) MPa(ksi) | 980(142) | |
| Tensile Strength (900°C/1h/WQ1500°C/8h) MPa(ksi) | 1080(157) | |
| 0.2% Proof Stress (Annealed 700°C/2h) MPa (ksi) | 890(129) | |
| 0.2% Proof Stress (900°C/1h/WQ+500°C/8h) MPa (ksi) | 970(141) | |
| Elongation On 50Mm (Annealed 700°C/2h) | 17 % | |
| Elongation On 50Mm (900°C/1h/WQ+500°C/8h) | 16 % | |
| Reduction In Area (Annealed 700°C/2h) | 39 % | |
| Reduction in Area (900°C/1h/WQ+500°C/8h) | 42 % | |
| Fracture Toughness (Annealed 700°C/2h) MPa.m1/2(ksi.in1/2) | 84 (76) | |
| Fracture Toughness (900°C/1h/WQ+500°C/8h) MPa.m1/2(ksi.in1/2) | 69 (63) |
» Fabrication Information
| Weldability | Fair |
| Forging | Rough 982°C(1800°F), finish ó 968°C (1775°F) |
Annealing |
732°C(1350°F), --4hr, FC to 566°C(1050°F), AC FC not necessary for bars |
| Solution Treating | forgings |
Ageing |
904-954°C (1660-1750°F), 5min-2hr, WQ 538°C (1000°F), 4hr, AC |
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