Thank You From Ohio Northern’s SAE Baja Racing Team

We were happy to support Ohio Northern’s SAE Baja team with a donation of varying diameters of 6-4 and 662 round bar. We look forward to seeing how their team and vehicle performs in the upcoming competitions!

Performance Titanium Group,

The Ohio Northern SAE Baja Team would like to thank Performance Titanium Group for their outstanding support of our team for the 2018-19 year. PTG has allowed us to explore the advantages and challenges that are associated with advanced materials such as Titanium. This year was our team’s first experience with using Titanium for components on the car. PTG was kind enough to donate several round blanks of their Ti 6Al-6V-2Sn and 6Al-4V alloys that were used for making gears. Utilizing Titanium’s superior strength to weight ratio, we were able to reduce rotational weight and moment of inertia, while maintaining sufficient strength. These gears are 45% percent lighter than our steel set, resulting in over 4lbs of weight loss in our gears from last year to this year. 

In addition to the many benefits that are associated with using Titanium over steel, some challenges were encountered along the way. The most prominent of these challenges was learning how to machine it. During our first time turning Titanium, we got the tooling and chips so hot they started to glow! Thus, we discovered Titanium’s poor heat dissipation and learned that coolant is an absolute must when machining it. However, after some research and trial and error, we figured out pretty well how to machine it by adjusting feeds/speeds/depth of cut.

In the coming weeks, the ONU Baja Team will be competing at the SAE sanctioned Baja race in Tennessee, where we are eager to see the benefit the Titanium gears will provide. Additionally, ONU will be competing in SAE races in California and New York this year.

Thank you again for supporting our team! – Polar Bear Racing

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Material Donation to Michigan Baja Racing for Spring 2019

Michigan Baja Racing Team & Car Photo
The Michigan Baja Racing Team and their yet to be named vehicle.

We’ve been happy to support the Michigan Baja Racing Team since 2015. We’ve seen them face great success over the years with their student designed and built vehicles. Once again we were able to support the team this year with a material donation of 662 titanium round bar. As they gear up for competition starting in April, I was able to check in with Jeremiah Johnson, Manufacturing Director, to see how the titanium was used and how they feel about the upcoming competitions:

662 Titanium Round Bar
662 Titanium Round Bar Donated by PTG.

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What Grade of Titanium Do I Need?

Quite frequently, we’re asked what the best grade of titanium would be for someone’s application. This is more often true for hobbyists or those new to the use of titanium. While we can’t recommend the best grade for your application, we can provide data sheets to help point you in the right direction. We suggest talking to the manufacturer’s engineering or metallurgy departments to be sure you are ordering the right material for your parts.

12" Round Bar - 6AL-4V
12″ Round Bar – Ti 6AL-4V

Some things to think about when choosing a grade:

  • What is the end use of my product? Different grades are more common for different industries and end uses. For example, the properties of 6AL-4V ELI may make it suitable for medical and dental applications. 6AL-4V, or Grade 5, is a very common grade for aerospace applications. For some applications, such as tooling or hobbies, machinists simply want an affordable option, such as Grade 2. But needs vary, and the most common or inexpensive grade is not necessarily the best one for your application.
  • Do I need the material to be weldable? Different grades have different levels of weldability, and some grades are not recommended to be welded at all.
  • What material specs or properties does my end product require? In the end, if requirements are imposed, you may not have any choice. You may be restricted to a certain grade. Different specifications, mechanical property requirements, and chemical makeup requirements will narrow down your choices.

Below are some common grades that we offer here at PTG. You can download our data sheets below for basic information regarding some of the questions above. For more extensive information, we recommend you get in touch with the manufacturer of the material. You can always contact us at 888.772.8984 or for assistance in reaching potential manufacturers.

6AL-4V / Grade 5
6AL-4V Eli
CP Grade 2
CP Grade 4

The use of this information is strictly voluntary and should be used as a guideline only. This data contains generalizations and is in no way a substitute for your own research. This information is not intended as a warranty or fitness of any application.

AMS 6931D: What You Need to Know

In December 2017, SAE released an updated and much-needed version of AMS 6931. Before we dig into some major changes in AMS 6931D, let’s take a look at where AMS 6931C left off.

AMS 6931 is a specification for titanium bar, forgings, and forging stock. AMS 6931 is specific to the 6AL-4V alloy.

AMS 6931C covered products up to 6” in diameter or least distance between parallel sides. However, it is commonly requested for products larger than 6” to be certified to AMS 6931. Since larger sizes were not specifically covered in the specification, AMS 6931C left it up to the purchaser and producer to determine what mechanical requirements could be satisfied for any products outside of the range identified in the specification. Usually manufacturers interpreted this as either (1) product manufactured in a size outside of the range of AMS 6931C would be manufactured to meet the properties of the largest size that is covered, or (2) since there are no specific requirements for products outside of the range of the specification, test results would be for information only, and not cause for rejection.

AMS 6931D recognizes that purchasers and end users are looking for assurances of what mechanical properties can be achieved in larger section sizes, by extending the coverage to 10” in diameter or least distance between parallel sides.  Also, while AMS 6931C defined properties for products with a maximum cross-section of 48 square inches, AMS 6931D extends to 79 square inches.  This allows titanium AMS 6931D products in this extended range to be certified without a “for information only” caveat; we now have firm requirements. For products larger than 10” diameter or least distance between parallel sides, and beyond a 79 square inch cross-section, the spec still does mandate the purchaser and producer to agree on the properties. [Read more…]