Titanium Grade 5 Round Bars
Giriraj Impex is a manufacturer, stockist, supplier and exporter of titanium Grade 5 round bar – Ti-6Al-4V, UNS R56400 – to ASTM B348 / ASME SB348 and AMS 4928, with Grade 23 (Ti-6Al-4V ELI) to ASTM F136 on request. We manufacture titanium Grade 5 round bars mill annealed, black or bright, in random lengths or cut to length, with mill test certificates.
Titanium Grade 5 bars are machined into high-strength, lightweight, corrosion-resistant parts: fasteners, shafts, connectors, valve and pump components, aerospace fittings and motorsport parts.
Specifications
| Item | Details |
|---|---|
| Standards | ASTM B348 / ASME SB348; AMS 4928; ASTM F136 (Grade 23 ELI) on request |
| Grade | Grade 5, Ti-6Al-4V (UNS R56400, WNR 3.7165) |
| Condition | Mill annealed; solution treated and aged on request |
| Surface | Black (hot rolled or forged), peeled, turned, ground, polished |
| Shapes | Round; hexagonal, square and billets on request |
| Length | Random lengths or cut to length |
| Testing | Ultrasonic test; microstructure examination for AMS orders |
| Documents | Mill test certificate (MTC); third-party inspection on request |
Chemical composition and mechanical properties
| Grade | UNS | N | C | H | Fe | O | Al | V | Other |
|---|---|---|---|---|---|---|---|---|---|
| Grade 1 | R50250 | 0.03 | 0.08 | 0.015 | 0.20 | 0.18 | – | – | – |
| Grade 2 | R50400 | 0.03 | 0.08 | 0.015 | 0.30 | 0.25 | – | – | – |
| Grade 5 | R56400 | 0.05 | 0.08 | 0.015 | 0.40 | 0.20 | 5.5–6.75 | 3.5–4.5 | – |
| Grade 7 | R52400 | 0.03 | 0.08 | 0.015 | 0.30 | 0.25 | – | – | Pd 0.12–0.25 |
| Grade 12 | R53400 | 0.03 | 0.08 | 0.015 | 0.30 | 0.25 | – | – | Mo 0.2–0.4, Ni 0.6–0.9 |
Hydrogen limits differ slightly between product forms; residual element limits as given in each ASTM specification.
| Grade | Tensile strength, MPa (ksi) | Yield strength 0.2%, MPa (ksi) | Elongation, % |
|---|---|---|---|
| Grade 1 | 240 (35) | 138 (20) | 24 |
| Grade 2 | 345 (50) | 275 (40) | 20 |
| Grade 5 | 895 (130) | 828 (120) | 10 |
| Grade 7 | 345 (50) | 275 (40) | 20 |
| Grade 12 | 483 (70) | 345 (50) | 18 |
Grades 1, 2 and 7 also have maximum yield strength limits. Values are typical of ASTM B265 and B348; check the specification for the product form.
Grade 5 is shown with the other titanium grades for comparison. Background is on the titanium Grade 5 page.
B348 or AMS 4928?
ASTM B348 is the industrial specification for titanium bars and billets, used for oil and gas, marine, chemical and general engineering parts and, as SB348, for ASME code construction. AMS 4928 is the aerospace specification for annealed Ti-6Al-4V bar, forgings and rings, with additional requirements for microstructure, ultrasonic inspection and certification. Many bars are certified to both; please state which the order requires.
How we manufacture titanium bars
We manufacture titanium Grade 5 round bars from certified billets by hot rolling or forging in the alpha-beta temperature range, followed by mill annealing. The surface oxide and alpha case formed during hot working are removed by peeling, turning or grinding to give bright bars with close tolerance. Bars are straightened, cut to length and marked with grade and heat number, and ultrasonic testing is carried out as the specification requires.
Machining titanium Grade 5
Grade 5 is stronger and harder to machine than commercially pure titanium. Use rigid machines, sharp carbide tools, low cutting speeds, relatively heavy feeds and generous coolant to carry heat away from the cutting edge, as titanium's low thermal conductivity concentrates heat there. Avoid dwelling or rubbing, which hardens the surface. Collect and store chips safely, as fine titanium swarf can burn. Threads for fasteners are preferably rolled for fatigue strength.
Where Grade 5 bars are used
Titanium Grade 5 bars are used for high-strength fasteners in offshore, marine and chemical equipment; shafts, impellers and valve parts in seawater; subsea connectors and riser components; aerospace fittings and fasteners; motorsport connecting rods, valves and suspension parts; bicycle and sports equipment; and, in the ELI grade, medical implants and surgical instruments.
Ordering titanium Grade 5 round bars
Please give the specification, diameter and tolerance, condition, surface, length, quantity and any ultrasonic or microstructure requirement. Bars are packed in wooden boxes, bright bars wrapped, and each piece is traceable to its mill test certificate.
Heat treatment
Most Grade 5 bar is supplied mill annealed, which gives a good balance of strength, ductility and machinability. Solution treating and ageing (STA) raises tensile strength further for highly stressed parts such as fasteners and connecting rods, at some cost in ductility; the heat treatment is specified on the drawing or purchase order. Stress relieving after heavy machining reduces distortion in thin parts. Heat treatment must be done in vacuum or inert atmosphere, or the oxygen-enriched surface layer removed afterwards.
Grade 5 compared with Grade 2 bar
Grade 2 commercially pure titanium bar is used where corrosion resistance is the priority and loads are moderate – fittings, flanges and valve parts for chemical and seawater service. Grade 5 is chosen where strength and low weight matter as well. Both resist seawater and chlorides; Grade 5 has slightly lower resistance in some reducing acids.
Applications and related products
Other titanium bars are on the titanium round bars page, and other materials on the round bars, rods and wires page.
Frequently Asked Questions
ASTM B348 for industrial use and AMS 4928 for aerospace; Grade 23 ELI bar is covered by ASTM F136.
Ti-6Al-4V is titanium Grade 5, an alloy with about 6% aluminium and 4% vanadium.
Minimum tensile strength about 895 MPa and yield about 828 MPa in the annealed condition.
It needs sharp carbide tools, low speeds, heavy feeds and plenty of coolant, but machines well with the right set-up.
The aerospace material specification for annealed Ti-6Al-4V bars, forgings and rings.
Yes, Ti-6Al-4V ELI bars to ASTM F136 can be supplied on request.
Request a Quote for Titanium Grade 5 Round Bars
Tell us the product, grade, size, standard, quantity and delivery location, and our sales team will reply with a quotation.