2iSUPPLY
Zirconium 705
Zirconium 705
Quick safety waiver
Dust and chips from grinding or machining zirconium can catch fire on their own. Please initial each line and sign before adding this to your cart.
I understand zirconium and titanium dust and chips can self-ignite and cause a serious fire.
I accept all risks of working with this material and release 2iSUPPLY from any claims for injury, death, or property damage connected to my use of it, even if caused by my own negligence.
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Working with zirconium safely
- Clean up dust and chips often, and keep them away from sparks from steel grinding.
- Keep a Class D extinguisher or a bucket of dry sand nearby.
- Never use water on a burning zirconium fire.
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Zirconium 705: Premium Zirconium Alloy for Knifemaking
Originally developed for demanding aerospace, nuclear and chemical processing applications, Zirconium 705 is the benchmark zirconium alloy for premium custom knives. Alloying zirconium with niobium dramatically increases its strength over commercially pure Zirconium 702, making it suitable for spring-loaded components while preserving zirconium's exceptional corrosion resistance.
Compared to Grade 5 titanium, Zirconium 705 is approximately 50% heavier (6.56 vs. 4.43 g/cm³), has a comparable elastic modulus (~95 vs. 114 GPa), and achieves mechanical strength approaching that of Grade 5 titanium. Unlike Zirconium 702, its higher strength and improved spring properties make it ideally suited for frame locks, pocket clips, lock inserts, backspacers, bolsters and pivot collars.
One of Zirconium 705's defining characteristics is its ability to develop an exceptionally deep black oxide finish through controlled heat treatment. Unlike coatings or PVD finishes, this oxide is formed directly from the base material, making scratches far less noticeable while preserving the premium feel of solid metal.
The increased strength of Zirconium 705 also makes it noticeably less gummy during machining than Zirconium 702. It produces cleaner cuts, sharper edges and finer surface finishes, allowing intricate details and precision-machined components with reduced tool loading.
