Gr2 Titanium Round Bar

Grade 2 Titanium Round Bar is a commercially pure titanium material with a titanium content of 99%. It has excellent corrosion resistance and good formability and weldability. It is widely used in aviation, automobile, medical, chemical and marine engineering fields, especially in corrosive environments such as seawater and chloride. Compared with grade 5 and grade 9 titanium alloys, it has stronger corrosion resistance and slightly lower strength.

Grade 2 Titanium round bar specifications and certifications

• ASTM B348,
• ASTM F67,
• ASME SB-348 ,
• ASTM B381

In addition to complying with mainstream standards such as ASTM B348, Chalco's Grade 2 Titanium Round Bars can also provide SGS test reports according to project requirements, meet RoHS and REACH environmental regulations, and support special processes (such as heat treatment and non-destructive testing) completed by NADCAP-certified factories to ensure that the material meets the requirements of high-end applications such as aviation, medical and environmental protection.

Available types of gr2 titanium round bars

Different Types of Titanium Round Bars and Sizes

Chalco offers customized Grade 2 Titanium Round Bars in a wide range of types and dimensions—including forged, rolled, and extruded options—tailored to meet specific customer requirements. We also provide high-precision turned Titanium Round Bars to ensure exact dimensions, tight tolerances, and superior surface finishes.

Characteristics of grade 2 titanium round bar

Strong corrosion resistance

Grade 2 Titanium Round Bars exhibit extremely low corrosion rates (e.g. <0.005 mm/y in seawater) in environments such as seawater, wet chlorine, and oxidizing acids (such as nitric acid). The dense TiO₂ oxide film on the surface has passivation and self-healing capabilities, and resists electrochemical corrosion for a long time.

High temperature resistance

Grade 2 Titanium Round Bars retain good impact resistance at low temperatures. ASME BPVC specifies that it can be used at temperatures as low as -75°F (-43°C). It can be used continuously at temperatures up to 800°F (484°C) and intermittently at temperatures up to 1000°F (504°C).

Good processing formability

Grade 2 Titanium Round Bars have moderate hardness, good hot and cold processing properties, and an elongation of ≥20%. They can be processed by forging, deep drawing, cutting, bending and other forming processes, and are suitable for manufacturing titanium parts with complex structures .

To improve the processing stability and ductility of the material, heat treatment can be performed. Stress relief is usually heated between 900°F–1100°F, followed by slow or forced air cooling; if further softening of the material and improvement of plasticity is required, full annealing in the range of 1200°F–1400°F is recommended.

Excellent welding performance

Conventional welding methods such as TIG, MIG, and electron beam can be used. The strength of the welded joint can reach more than 90% of the parent material, which is suitable for titanium equipment manufacturing, pipeline splicing and other occasions.

When welding, inert gas protection must be used to avoid material embrittlement due to oxygen absorption. MIG and TIG welding are the preferred methods, and argon-helium mixtures are usually used for best results. Preheating or post-heat treatment is usually not required, which simplifies the welding process.

High biocompatibility

It is highly pure, non-toxic, and free of heavy metal precipitation. It complies with ASTM F67 standards and is commonly used in industries with strict requirements on material safety, such as medical implants and food equipment.

Non-magnetic, anti-electromagnetic interference

It is non-magnetic and has low electrical conductivity, making it suitable for special environments such as radar, MRI, and electrolysis to avoid magnetic field interference and eddy current loss.

Application of ASTM B348 gr2 titanium round bar

• Heat exchanger tube sheet mandrel
• Chemical reactor connecting bar
• Seawater Pipe Support
• Medical implant blanks (e.g. hip joints, implants)
• Marine bolts and fasteners
• Food Processing Mixing Shafts
• Flue gas desulfurization system connectors

Real-world applications of grade 2 titanium round bars

In an application in a large chlor-alkali plant, this Titanium Round Bar was perforated and processed into a cold-rolled tube. After serving for 18 months, local pitting corrosion occurred under abnormal conditions, providing valuable failure analysis basis for material selection and system design.

In a seawater desalination plant in the Middle East, Gr2 Titanium Round Bars are perforated and cold-rolled into tube bundles for use in high-salt concentration, multi-stage flash evaporation systems. They have been in continuous operation for more than 25 years with almost no need for replacement, greatly reducing maintenance costs and verifying their ultra-long life and stability for seawater equipment manufacturers.

In an experimental heat exchanger at a geothermal power station, Gr2 Titanium Round Bar samples were processed and installed in a 200°C high-temperature salt brine environment, serving together with 316L and 254SMO alloys. Long-term testing showed that the Titanium Round Bars only showed slight abrasion, providing a key material screening basis for geothermal systems.

In a large domestic titanium dioxide plant, the Gr2 Titanium Round Bar is integrally machined into a stirring impeller with a diameter of 1200 mm. It is exposed to acid-containing slurry and 10 bar high-pressure environment for a long time. After being put into use, it has passed multiple annual inspections with zero corrosion, providing a reliable metal component material solution for the clean chemical industry.

In the PIP-II accelerator project at Fermilab (Fermi National Accelerator Laboratory) in the United States, Grade 2 Titanium Round Bars are forged into external stiffening rib structures and welded to superconducting niobium cavities. These components operate in an ultra-high vacuum environment at 2K. The excellent low-temperature ductility and lightweight properties of Gr2 titanium provide critical structural stability for scientific equipment under extreme cryogenic conditions.

In the structural restoration project of the Leaning Tower of Pisa in Italy, Gr2 Titanium Round Bars were used as concealed reinforcement bars, successfully achieving long-term structural stability; at the same time, in the installation of titanium cladding panels at the Guggenheim Museum in New York, the material demonstrated excellent oxidation resistance and visual beauty, providing a high-quality and durable structural material option for urban buildings and cultural relics protection projects.

Gr2 titanium round bar stock

Chalco has long-term inventory of Grade 2 titanium round bars in accordance with ASTM B348 standard, with diameters ranging from φ3mm to φ130mm and a standard length of 3000mm. It also supports cutting to length and small batch purchasing according to customer needs.

All stock sizes meet the above tolerance requirements. Custom services are also available for special sizes and tolerances.

Chalco gr2 titanium round bar tolerances

Chalco's Grade 2 titanium round bars strictly comply with international standards such as ASTM B348, with stable dimensional accuracy and excellent surface quality. We can provide corresponding standard tolerance ranges according to different diameter segments, covering small-size precision bars to large-size structural bars, meeting customers' high-precision requirements in a variety of applications such as aerospace, chemical equipment, and medical processing.

If you need special dimensions or stricter tolerances, we can also customize them according to the drawings.

Chemical composition of CHALCO grade 2 titanium round bar

UNS R50400 titanium round bar mechanical properties

The difference between gr2 titanium round bar and gr5 titanium round bar

Grade 2 and grade 5 titanium round bars (/products/titanium-bar/ti-6al4v-titanium-bar) are the two most widely used titanium materials. The former is known for its corrosion resistance and good processability, while the latter is known for its high strength and structural bearing capacity. They are suitable for different industrial needs and usage environments.

FAQ

Can grade 2 titanium round bars be heat treated and strengthened?

As commercially pure titanium, Grade 2 has no phase transformation strengthening mechanism and cannot significantly improve strength through heat treatment. It mainly relies on cold working to achieve slight hardening. If high strength is required, it is recommended to use alloy grades such as Grade 5.

Can grade 2 titanium round bars be used in cryogenic environments?

Grade 2 has good toughness and ductility at low temperatures and does not break brittlely under liquid nitrogen (-196°C), making it suitable for use in extremely cold areas or liquid nitrogen equipment components.

What surface treatments can be applied?

It can be processed by lathing, sanding, pickling, shot blasting, anodizing, etc. If used for medical or decorative purposes, it can be mirror polished or colored oxidized to enhance the appearance and functionality.

Are custom processing services available?

A variety of machining services are available, including sawing, precision turning, drilling, chamfering, and end-face grinding. We support both small-batch prototyping and large-scale custom production to meet diverse application needs.

What is the thermal conductivity of grade 2 Titanium Round Bar?

The thermal conductivity is about 16.4 W/m·K (20°C), which is lower than that of aluminum and copper. However, its thermal conductivity is stable in corrosive environments and is suitable for structural components in chemical heat exchangers or evaporators that require long-term corrosion resistance and thermal conductivity.