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Titanium Grade 2 Round Bar is a commercially pure titanium product that resists seawater, chlorides, and many process chemicals while weighing far less than steel. I recommend it for chemical processing, marine, desalination, and heat-exchange equipment, where corrosion drives up maintenance costs. It offers a minimum tensile strength of 345 MPa, a minimum elongation of 20 percent, and good weldability. It does not fit every job because it costs more than stainless steel and deflects more under load. This guide covers properties, standards, processing, and buying steps so you can choose with confidence.

What Is Titanium Grade 2 Round Bar?

Composition and Purity

The Titanium Grade 2 Round Bar is commercially pure, which means it is made up of at least 99.2% titanium. The rest is made up of a tiny group of leftover elements. ASTM B348 specifies a maximum iron content of 0.30% and a maximum oxygen content of 0.25%. On top of that, it has limits for hydrogen, nitrogen, and carbon. This information is important to know because oxygen and other interstitial elements make things stronger but less able to bend. In the end, an alpha-phase structure is made that is simple to shape, welds cleanly, and stays tough even when hot. Grade 2 is often called the "workhorse grade" because it is less expensive than alloyed titanium.

Standards and Product Forms

The standard, ASTM B348, is where most people who want to buy bars or billets made of titanium or a titanium alloy start. CXMET says that its hot-rolled titanium Grade 2 Round Bar meets ASTM B348, AMS 4921, and ASME SB348. The ASME listing is important when pressure equipment is built according to ASME rules. You can pick a surface that is polished, pickled, turned, or ground without a core. You can order lengths between 1000 mm and 6000 mm and heights between 3 mm and 300 mm. "Rod," "shaft," and "bill" are all words that can mean different sizes or shapes. Before cutting a bar for a customer, the customer must write down the grade, standard, diameter, length, finish, and heat number.

Our Production Base and Quality Documents

In 2005, Shaanxi CXMET Technology Co., Ltd. established itself in Shaanxi Province, which is known as China's "Titanium Valley." The site is 50,000 square meters, and there are more than 80 professional technicians here to help with production and technical problems. We hot-roll our titanium Grade 2 round bar and finish it the way you want. We have certifications from ISO 9001, SGS, and EN 10204 3.1. The lab results for chemistry and engineering are linked to a link in the award for the material. Like this, your quality team can check each delivery against the order. Our metals of choice are zirconium, molybdenum, tantalum, niobium, nickel, and titanium. This means we can work on projects that need more than one metal.

Titanium Grade 2 Round Bar Properties and Corrosion Resistance

Mechanical Properties You Can Design Around

It can stretch at least 20% and has a minimum tensile strength of 345 MPa and a minimum yield strength of 275 MPa all the way through Grade 2. It weighs 4.51 grams per cubic centimeter, which is 43% less than carbon steel, which weighs 7.85 grams per cubic centimeter. Titanium Grade 2 Round Bar has half as much elasticity as steel, at about 105 GPa. This means that a titanium shaft bends more when the same load is put on it. Techs should check more than just strength when they switch materials. The real numbers depend on the width and the state of the thing. I believe that the mill test certificate, not standard numbers, should be used to make the final plans.

Corrosion Resistance in Seawater and Process Media

When titanium is scratched in things that hold oxygen, it forms a thin, solid oxide film that heals quickly. Grade 2 works with nitric acid, chromic acid, seawater, and brine because of that movie. It can also handle small amounts of weak reducing agents, such as sulfuric and hydrochloric acids that have been diluted. 304 and 316 stainless steels can get pits and stress rust breaks when they are exposed to salt. Many people switch to titanium for this reason. The outcome is still based on temperature, flow rate, deposits, cracks, the quality of the weld, and contact with metals that are not the same. When checking for corrosion in important installations, it is best to do it in the real working circumstances.

Temperature Limits and Where Grade 2 Falls Short

CXMET says its titanium Grade 2 Round Bar can be used in temperatures ranging from low to high, up to 400°C. Above that range, you need to look at oxidation, creep, and strength loss again, and heat exchangers should pay attention to thermal cycling. It doesn't wear down quickly, but Grade 2 can get rough when it slides. It also doesn't work as well when the oxide film is broken, like in dry chlorine gas or hydrofluoric acid. Let us know right away if you reach these limits in your service. Thereafter, we can talk about whether a different type of titanium or a blend would work better.

Titanium Grade 2 Round Bar vs. Other Engineering Materials

Grade 1, Grade 2, and Grade 5

Grade 1 is softer and more bendable, and it can stretch up to 240 MPa. In Grade 5 (Ti-6Al-4V), it drops to 895 MPa, which is about 2.6 times lower than in Grade 2. That metal gets its strength from being shaped, milled, and bonded harder. Since titanium Grade 2 Round Bar is in the middle, it's the best choice when it comes to peak strength and resistance to corrosion. Grade 5 could be a better choice if your part has to support heavy loads. Grade 2 usually wins if the part you bend, shape, or weld gets chemical or salt water on it.

Stainless Steel Comparisons

44% less heavy than 316 stainless steel and 43% less heavy than carbon steel. 316L that has been annealed has a lowest yield strength of about 170 MPa. Grade 2, which has a lowest tensile strength of 275 MPa, can match or beat that high yield strength. Chloride doesn't cause cracks and pits in titanium the way it does in stainless steel. Steel that is dry or mild is still a better choice because it costs less per kilogram and is about twice as stiff. I believe you should consider the total cost over the entire duration, including any downtime, rather than just the price you paid.

Aluminum and Lifecycle Cost

Aluminum is lighter than steel because it is not as dense. Plus, it costs less and is simpler to use. Marine-grade aluminum alloys are good for a lot of things that happen in salt water. Titanium tends to last longer in process streams that are hot, full of chlorides, or chemically harsh, and it stays strong at higher temperatures. You might need to fix a pump shaft or heat exchanger part every two years. This means that the less expensive stuff might cost you more in the end. Making a list of a material's corrosion, strength, stiffness, weight, wear, manufacturing, availability, and overall cost is something I tell people to do before they buy it.

Machining, Welding, and Customization

Machining Titanium Grade 2 Bars

Titanium Grade 2 Round Bar is good for machines as long as you take into account the fact that it doesn't help heat move. The metal smears or galls instead of cutting through because the heat stays on the cutting edge. Lots of coolant, slow cutting speeds, steady feed rates, and carbide tools that are very sharp are all things that you should use. Don't let the tool rest while it's cutting. This will keep the surface from getting too hard. Dust and small chips can catch fire, so clean up the shop and know how to handle chips properly. The surface will be less likely to rust if you use the right tools and watch out not to get iron on it.

Welding and Heat Treatment

If you use argon or helium to protect the molten pool, the heat-affected zone, and the back side, it's easy to GTAW weld Grade 2. When oxygen and nitrogen are picked up at high temperatures, they make the joint less strong. Clean the parts well and use the following shields to keep it safe. You can quickly tell if something is clean by its weld color. Straw that is bright silver or light usually works, but straw that is dark blue or gray has been contaminated. It doesn't change Grade 2 at all when precipitation gets stiffer. People can still ask for annealing or stress relief, and we can talk to you about those needs when we give you a quote.

Customization Options and Tolerances

This simple stock bar isn't enough for many tasks. You can change the look of your titanium Grade 2 Round Bar in these main ways:

• Size and length: We have bars that are 3 mm to 300 mm across and 1000 mm to 6000 mm long. If you need them cut to a different length, just let us know. We will give you a price for the best size that will keep your machine waste and trash to a minimum. Just tell us the width and length you want.
• Machining and finish: Based on your plans or CAD files, we can make bars. The outside can be polished, pickled, turned, centerless ground, sanded, or passivated. The standards H9 and H10 are used most often. You can grind things to be even more precise for sealing surfaces and bearing fits.
• Inspection and branding: If you ask, we can have a third party do quality checks and tests and give you EN 10204 3.1 certificates. Any partner from anywhere in the world can use our OEM and private label services. Just let us know what tests you need.

These options reduce rework because bars arrive close to final size and finish.

Applications and Buying Guide for Titanium Grade 2 Round Bar

Where Grade 2 Bars Work Best?

It is often used in desalination plants, seawater systems, heat exchangers and condensers, tanks and lines for processing chemicals, and equipment for making power. The Titanium Grade 2 Round Bar is also used in electrochemical and anodizing equipment, as well as in parts of buildings that are open to bad weather. There is no magnetic field in Grade 2, so it is used in medical devices and surgical parts. When looking for materials that are good for implants, people should ask for the medical standard, such as ASTM F67, instead of the general industrial standard. It can be used by food and drug tools as long as the rules for fineness and contamination are followed. If someone wants to buy aerospace, they should first make sure they know what certifications they need.

How to Write a Complete Purchase Specification?

With clear instructions, you can avoid most delays. Don't forget to list the grade, standard, diameter, length, quantity, tolerances, surface finish, testing, packaging, and location where the goods will be sent. You should ask for a mill test report that shows the mechanical, chemical, and heat numbers. Look at the "landed cost" when you compare prices. This includes things like cutting, certification, freight, duties, packing, wait time, and more. To find out how much something weighs for shipping, multiply its diameter by four times its length and then by its mass. All numbers are equal. There is about 1,963 cm³ of space inside a 50 mm by 1,000 mm bar. At 4.51 g/cm³, the density means that the bar weighs about 8.86 kg.

Procurement Risks to Avoid

Small holes are often the start of trouble. People who buy Grade 2 often get it mixed up with Grade 1 or Grade 5. They also choose a standard that isn't clear or only look at the price per kilogram. Fit-up and testing fail because there aren't enough tolerance or surface standards. Bad packaging can break bars, let water in, or get iron on them. You should use a detailed buy order, match each certificate to its heat number, and ensure that the bars are clearly marked with the right materials when they arrive. To lower both technical and delivery risk for big orders, we can set up inspections before they are shipped or by a third party. Tell us what you need.

Conclusion

Titanium Grade 2 Round Bar is a pure alpha-phase product that can be bought in stores. It has a minimum tensile strength of 345 MPa and a minimum elongation of 20%. Furthermore, seawater, chlorides, and oxidizing acids don't hurt it much. If you need something lighter, this is the best choice. However, it costs more, isn't as stiff, and can only be used up to 400°C, so you should think about each use carefully. When it comes to rust, Grade 2 is better than Grade 1. Better than stainless steel, it is easier to shape and weld than Grade 5. It also holds up better against chloride attacks. You need to clean up after cutting and welding, have a full buy specification, have certificates that can be tracked, and look for grade mix-ups, contamination, and gaps in the tolerances. To get a long life from your equipment, make sure the grade is right for the way it will be used.

FAQ

Can Grade 2 titanium be welded?

Yes. GTAW works well when argon or helium is used to protect the molten pool, the heat-affected zone, and the back side of the piece. This is because oxygen and nitrogen pick up weaken the joint. Clean the parts and check the color of the weld.

Is Grade 2 harder to machine than steel?

Yes, most of the time. If the titanium Grade 2 round bar doesn't let heat pass through it well, the cutting edge and gall will get hot. Use a lot of coolant and keep the speeds low. Set the feeds and speeds steady.

How does Grade 2 compare with Grade 5?

The tensile strength of Grade 5 is at least 895 MPa, but only 345 MPa for Grade 2. Grade 2 is better for lab and boat parts because it doesn't rust and is easier to shape and weld.

What documents should come with the bars?

You should ask for an EN 10204 3.1 material document that lists the chemistry, mechanical properties, heat number, standard, and size of the material. This is the rule for buying things: ASTM B348. Things that are critical should have reviews from a third party added.

Request a quote for a titanium grade 2 round bar from CXMET

Want to find a company that can give you a titanium Grade 2 round bar, follow your plans, and get it to you on time? Send an email to sales@cxmet.com with the metal's diameter, length, number, standard, accuracy, finish, and the address where you want it sent. The engineering team at CXMET will ensure they meet the lead time and provide the correct hot-rolled stock. You can change the sizes from 3 mm to 300 mm. To see all of our non-ferrous products, please visit https://www.cxmet-tech.com/.

References

1. ASTM International, Standard Specification for Titanium and Titanium Alloy Bars and Billets (ASTM B348/B348M), 2019

2. ASM International, ASM Handbook, Volume 2: Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, 1990

3. Donachie, M.J., Titanium: A Technical Guide, 2nd Edition, ASM International, 2000

4. Leyens, C. and Peters, M. (Eds.), Titanium and Titanium Alloys: Fundamentals and Applications, Wiley-VCH, 2003

5. Schutz, R.W. and Thomas, D.E., "Corrosion of Titanium and Titanium Alloys," ASM Handbook, Volume 13B: Corrosion: Materials, ASM International, 2005

6. Boyer, R., Welsch, G., and Collings, E.W. (Eds.), Materials Properties Handbook: Titanium Alloys, ASM International, 1994