Titanium hardness depends on the grade. The unalloyed grades sit on the Rockwell B scale, from 70 HRB for Grade 1 to 100 HRB for Grade 4, while the alloys Grade 9, Grade 5 and Grade 23 move to the Rockwell C scale, with Grade 5 at a nominal 33 HRC in the RMI Titanium […]
Titanium Hardness by Grade: Rockwell, Brinell and Vickers Figures Read More »
Titanium round bar in the sizes ordered against ASTM B348 and AMS 4928 for machined aerospace parts. Aerospace grade titanium is not a grade. It is not a grade number in the ASTM titanium grade series, and it is not an AMS specification number. It is purchasing shorthand for a combination: an alloy, usually Ti-6Al-4V,
Aerospace Grade Titanium: What the Phrase Actually Specifies Read More »
Whether titanium is heavy depends entirely on what you are putting it next to, and the two answers point in opposite directions. Against steel, no: titanium is a little over half the weight, and that is usually why it is on the drawing. Against aluminium, yes: titanium is roughly two thirds heavier. The question only
Titanium does not rust, and it does corrode. Those are two different statements and both are true. Rusting is a reaction of iron, and there is no iron phase in titanium for it to happen to, so the orange scale that eats carbon steel has no mechanism here. Corrosion is the wider word, and titanium
Yes. Titanium is a conductive metal, but a poor one. Commercially pure Grade 2 has an electrical resistivity of 56 microhm-centimetres at room temperature, which works out to about 3 per cent of the conductivity of annealed copper. The spread behind that number matters more than the number: Grade 5 sits at 171, roughly three
Is Titanium Conductive? Resistivity and Thermal Conductivity, Grade by Grade Read More »
Most titanium fact lists mix two different things: trivia about the element, and numbers an engineer is going to put on a drawing. The second kind is worth getting right, because several of the figures that circulate are quoted to more precision than the sources actually support, and a few of the properties most often
Titanium Facts: The Numbers, Their Spread, and What a Certificate Confirms Read More »
No. Titanium is paramagnetic, not ferromagnetic, and a household magnet will not stick to it. Relative magnetic permeability sits just above 1.0 in the commercial grades listed below, which is why engineering practice treats titanium as non-magnetic rather than weakly magnetic. The distinction matters once a drawing asks for a guaranteed figure, because the material
Is Titanium Magnetic? Grades, Permeability and What the Standards Do Not Verify Read More »
This page indexes every supplier comparison published on this site, grouped by product family. Each entry is a separate list built for one grade and one product form, because a buyer sourcing Grade 12 tube and a buyer sourcing Grade 5 forged block are not comparing the same companies. How these lists are built, and
Titanium Supplier Lists Index by Product Family Read More »
In boiling 90 percent nitric acid on a heating surface, the tests published by TIMET put unalloyed titanium at 1.0 to 6.6 mpy (0.03 to 0.17 mm/y) while Type 304L stainless ran 150 to 2,900 mpy (3.8 to 73.7 mm/y) in the same TIMET tests. That two-to-three order of magnitude gap is why nitric acid
Titanium in Nitric Acid: Rates, the Mid-Range Peak, and the Hard Limits Read More »
In the published TIMET tests, unalloyed titanium showed no measurable erosion in clean seawater at 25 ft/sec (7.6 m/sec), and at 120 ft/sec (36.6 m/sec) the reported rate was 0.3 mpy (0.008 mm/y). Those are test results at the conditions the source states, not a design limit for your equipment. What they do show is
Titanium in Seawater: What the Velocity and Erosion Data Actually Show Read More »