Titanium Round Bars Grade 1 / 2 / 3 / 4 / 5 / 7 / 12
Titanium round bars offer the highest strength-to-weight ratio of any structural metal, with a density only 57 % that of steel and an oxide film that gives near-total immunity to seawater, chlorides and oxidising acids. Commercially pure Grades 1 to 4 are chosen for corrosion service and formability, Grade 5 (Ti-6Al-4V) for high strength aerospace and engineering parts, while Grade 7 (Ti-0.15Pd) and Grade 12 (Ti-0.3Mo-0.8Ni) extend resistance to reducing acids and crevice corrosion.
Nexforge Alloys supplies titanium round bars in the annealed condition to ASTM B348 / ASME SB348, and Grade 5 additionally to AMS 4928. Bars are ground or peeled to close tolerances and are certified for chemistry, including interstitial oxygen, nitrogen and hydrogen, together with room temperature tensile properties.
Titanium Grade 1, 2, 3, 4, 5, 7 and 12 round bars from 6 mm to 250 mm diameter, as per ASTM B348 / ASME SB348 / AMS 4928, with interstitial analysis on every heat.
Titanium Round Bar Specification
| Parameter | Details |
|---|---|
| Grades | Gr 1 (R50250), Gr 2 (R50400), Gr 3 (R50550), Gr 4 (R50700), Gr 5 Ti-6Al-4V (R56400), Gr 7 (R52400), Gr 12 (R53400) |
| Standards | ASTM B348, ASME SB348, AMS 4928 (Gr 5), AMS 4921 (Gr 2), ASTM F67 / F136 (medical, on request) |
| Size Range | 6 mm to 250 mm diameter |
| Length | Random 2 to 4 metres, or cut to length |
| Condition | Annealed (mill annealed) |
| Surface Finish | Peeled, centreless ground, polished |
| Tolerance | h9 / h10 or as per drawing |
| Testing | Chemical (incl. O, N, H), tensile, hardness, UT (AMS 2631) on request |
| Certification | EN 10204 3.1 mill test certificate |
Chemical Composition (% by weight)
| Grade | Al | V | Pd | Mo | Ni | Fe (max) | O (max) | C (max) | N (max) | H (max) | Ti |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Grade 1 | - | - | - | - | - | 0.20 | 0.18 | 0.08 | 0.03 | 0.015 | Balance |
| Grade 2 | - | - | - | - | - | 0.30 | 0.25 | 0.08 | 0.03 | 0.015 | Balance |
| Grade 3 | - | - | - | - | - | 0.30 | 0.35 | 0.08 | 0.05 | 0.015 | Balance |
| Grade 4 | - | - | - | - | - | 0.50 | 0.40 | 0.08 | 0.05 | 0.015 | Balance |
| Grade 5 (Ti-6Al-4V) | 5.5 - 6.75 | 3.5 - 4.5 | - | - | - | 0.40 | 0.20 | 0.08 | 0.05 | 0.015 | Balance |
| Grade 7 | - | - | 0.12 - 0.25 | - | - | 0.30 | 0.25 | 0.08 | 0.03 | 0.015 | Balance |
| Grade 12 | - | - | - | 0.2 - 0.4 | 0.6 - 0.9 | 0.30 | 0.25 | 0.08 | 0.03 | 0.015 | Balance |
Mechanical Properties
| Grade | Tensile Strength (min) | 0.2% Yield Strength | Elongation (min) | Reduction of Area (min) | Density |
|---|---|---|---|---|---|
| Grade 1 | 240 MPa (35 ksi) | 138 - 310 MPa | 24 % | 30 % | 4.51 g/cm³ |
| Grade 2 | 345 MPa (50 ksi) | 275 - 450 MPa | 20 % | 30 % | 4.51 g/cm³ |
| Grade 3 | 450 MPa (65 ksi) | 380 - 550 MPa | 18 % | 30 % | 4.51 g/cm³ |
| Grade 4 | 550 MPa (80 ksi) | 483 - 655 MPa | 15 % | 25 % | 4.51 g/cm³ |
| Grade 5 (Ti-6Al-4V) | 895 MPa (130 ksi) | 828 MPa (120 ksi) min | 10 % | 25 % | 4.43 g/cm³ |
| Grade 7 | 345 MPa (50 ksi) | 275 - 450 MPa | 20 % | 30 % | 4.51 g/cm³ |
| Grade 12 | 483 MPa (70 ksi) | 345 MPa (50 ksi) min | 18 % | 25 % | 4.51 g/cm³ |
Values are minimum or typical figures as per the referenced standards and are for guidance only. Please refer to the mill test certificate supplied with the material for actual values.
Key Features
- Density of 4.5 g/cm³ - about 45 % lighter than nickel alloys of similar corrosion resistance
- Immune to seawater, wet chlorine, hypochlorites and oxidising acids
- Grade 5 delivers 895 MPa tensile strength with excellent fatigue performance
- Grades 7 and 12 resist crevice corrosion and dilute reducing acids
- Biocompatible and non-magnetic
Applications
- Aerospace airframe and engine components, fasteners and landing gear parts (Gr 5)
- Heat exchangers, condensers and desalination plant components (Gr 2)
- Chlor-alkali, PTA and chemical process shafts, pumps and valves (Gr 2, 7, 12)
- Offshore risers, sub-sea and marine hardware
- Medical implants and surgical instruments (Gr 2, 4, 5 ELI)