High-Strength Pure Gr4 Titanium Bars
Product Name: Gr4 Titanium Bar
Standard: ASTM B348,ASTM F67,ASME SB 348
Surface: Pickled, polished，machined surface
Shapes: Round bar, square bar, rectangular flat bar, hexagonal bar
Description
Technical Parameters
Products Description
Grade 4 Titanium (UNS R50700, CP Ti Grade 4, TA4 in Chinese standard) is the highest-strength grade among all commercially pure titanium. Unlike Ti-6Al-4V Grade 5 titanium alloy, it contains no aluminum or vanadium. Strength is elevated by controlled interstitial elements inside single-phase α-titanium matrix. Gr4 titanium bars comply mainly with ASTM B348, ASTM F67, widely supplied as round bar, square bar, flat bar and hexagonal bar.
- Choose Gr4: When you need higher strength than Gr1/Gr2/Gr3 pure titanium, require pure titanium corrosion resistance & biocompatibility, and want to avoid alloy elements (Al, V) in Grade 5.
- Choose Gr5: If higher ultimate tensile strength is the top priority and alloy composition is acceptable.
Chemical Composition
| Element | C | N | H | O | Fe | Ti |
| Limit | 0.08 | 0.05 | 0.0125 | 0.4 | 0.5 | Balance |
Mechanical Properties
| Parameter Name | Value | Unit | Remark |
| Minimum Tensile Strength | 552 | MPa | 80 ksi |
| Minimum 0.2% Yield Strength | 483 | MPa | 70 ksi |
| Elongation | 15 | % | Minimum value |
| Reduction of Area | 25 | % | Minimum value |
| Density | 4.51 | g/cm³ | Room temperature |
| Modulus of Elasticity | 110 | GPa | Approximate value |
Physical Properties
| Property | Typical Value |
| Density | 4.51 g/cm³ (0.163 lb/in³) |
| Crystal Structure | Hexagonal Close-Packed (HCP, fully α-phase at service temperature) |
| Melting Point | 1660–1670 °C |
| Beta Transus Temperature | 835 ± 4 °C |
| Magnetic Characteristic | Non-magnetic |
Applications of Gr4 Titanium Bars
Chemical & Marine
Pressure-bearing corrosion-resistant fittings, seawater equipment, desalination components, pumps & valve shafts working in chloride environments.
Medical & Dental
Aerospace
High-strength pure titanium fasteners, rivets, lightweight structural parts requiring corrosion resistance without alloy elements.
Precision Machinery & Watchmaking
High-strength lightweight structural blanks, anodizable decorative structural components.
Welding Industry
Filler wire raw material for titanium welding
Manufacturing Process of High-Strength Pure Gr4 Titanium Bars
Raw Material Preparation
Adopt high-purity titanium sponge, precisely control oxygen and iron content (core elements for Gr4 high strength), remove harmful impurities, and compact into welding electrodes.
Vacuum Arc Remelting (VAR)
Perform double or triple vacuum remelting to produce qualified titanium ingots. Eliminate internal pores and segregation, stabilize uniform chemical composition for consistent high strength.
Ingot Preprocessing
Machine and grind the ingot surface to remove oxide layers, surface cracks and casting defects.
Hot Forging
Heat the ingot to 850–920 °C for open-die forging. Refine coarse grains, eliminate internal defects, homogenize microstructure, and forge into standard titanium billets.
Hot Rolling & Shaping
Reheat billets and conduct multi-pass hot rolling to form titanium bars with target specifications and dimensions.
Stress Relief Annealing
Heat bars to 650–760 °C for full annealing. Release processing residual stress, stabilize mechanical properties, and balance Gr4's strength and ductility.
Precision Finishing
Straighten bars, cut to fixed lengths, and perform precision grinding/polishing (optional) to meet dimensional tolerance and surface finish requirements.
Full Inspection & Delivery
Test chemical composition, mechanical properties, hardness, dimensional accuracy and internal defects (UT). Issue qualified MTC certificates before packaging and delivery.
Products Description
Everything You Need to Know
What diameter sizes can you supply for Gr4 titanium round bars?
Common range: Φ3.0 mm ~ Φ75 mm. Small diameters and larger diameters are supplied as ground bright bars. Custom lengths and cutting service are available.
Is Gr4 titanium biocompatible?
Yes. It is non-toxic, non-magnetic and biocompatible. Widely used for surgical tools.
Note: For permanent implant devices, ASTM F136 Gr23 (Ti-6Al-4V ELI) is more commonly selected;
Gr4 is more popular for temporary medical hardware and instruments.
Does Gr4 titanium bar resist corrosion?
Yes. It forms a stable passive titanium oxide film. It exhibits excellent resistance to seawater, chloride solutions, dilute acids, and oxidizing environments. Not suitable for highly concentrated hot hydrochloric acid or hydrofluoric acid without protection.
What Machining Tips for Gr4 Titanium Bars?
Titanium has low thermal conductivity.
Use sharp tools, sufficient cooling fluid, moderate cutting speed to avoid work hardening and surface burning.
Contact Us
Ruihang, as a direct manufacturer of titanium products, supply optimal quality raw materials for your precision components production. If you have any purchasing needs for Titanium Plates, please feel free to contact us via email.
Our address
No.16, Industrial Avenue East,, Baoji City, Shaanxi Province, CHINA
Phone Number
+86 186 9515 4391
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