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If they're used to getting pins made from half to full hard 300 series wire, and now they're getting pins made from 1/8 stock, it could be that the pins won't spring back like they once did. The yield strength isn't high enough. Most of the 316 I deal with is already annealed (we commonly use...

Would you know on what basis the annealing claim is being made? Is it that the pins are distorting, or that they were full hard and now are less magnetic? I ask since it's really unusual for the small, localized heating from cutting to have any effect on the structure of the 316.

Interesting that others are also having problems with CarTech lots of 440C. One of the ways we've dealt with this for applications where we can't tolerate pipe is to buy VAR or ESR remelted grades. Since the solidification is from the bottom up, rather than from the sides in, the propensity to...

We process a good deal of 440C, and I find Marble's etch to work well. At 57-60, you have a primarily martensitic structure, and I'm certain you also have some retained austenite unless you're deep freezing before any tempering step. Yet if your problem is distortion, examining the...

Sponge isn't really 'sintered'. It's mixed with the alloying elements needed to get to the final desired composition, then pressed into an ingot, and then remelted. P/M titanium products, at least the ones I'm familiar with, are made from prealloyed powder, and are then sintered and hipped...

There's a reason it's forged 4130 or something similar. That is a reasonably strong steel, good ductility, readily available in wire, bar, or forgings. It certainly can be cast, and heat treated castings will be strong, but they will also be brittle. If you plan on this part seeing impact...

This isn't a scientific article: it's a news article for a webpage. Hence speed and sensationalism are the focus: clarity is not. If you are sufficiently interested, slog through the papers at http://fusion.materials.ox.ac.uk/links/dudarev.html, or look at the Modelling Programme information...

The difference in the -T6 and the -T651 or -T6510 or -T6511 tempers only shows when machining them: the stress relieved tempers might be more stable when machining. I say "might" since it is SO DEPENDENT on your machining process- how fast you machine, how sharp your tools are, etc. You should...

You're going to keep that zinc die cast part away from the hot part of the grill, right?

The big difference between 17-4 and 15-5 is that 17-4 is an air melt grade, while 15-5 is vacuum arc or electroslag remelted. (Yes, I know you can get 17-4 vac melted, but that’s a special, not a commodity.) The vacuum or electroslag remelting does help some in making the steel cleaner, no...

MATE45: OK, the Curie temp is minus 192 F, so that means that Inconel 600 sitting in liquid nitrogen will likely attract a magnet. Same with Inconel 718, since Special Metals says it has a Curie temp of minus 170 F. You'll also note the permeability you mentioned was 1.010, hardly over 1...

The big difference between 15-5 and 17-4 is remelting: 15-5 is usually remelted, either VAR or ESR, and 17-4 is not. So yeah, 15-5 is generally a bit cleaner, but I feel that's not the most important difference. A remelted material freezes from the bottom up, while an air melt ingot freezes from...

Battelle did some work on fracture propagation control of pipelines, and as part of that decided they needed to know the magnetic properties of pipeline steels. Take a look at http://www.battelle.org/pipetechnology/DOTReport/links_direct/MaterialDatabase.htm It may be suitable for your needs.

That's got to be a company specification, so only your customer can tell you for sure. I'd suggest you make a counter-offer, and go back to them with say, AMS 2759/3. They'll have to choose a condition, of course; if they can't do that, suggest H1025, which is likely the most common. Good luck!

At those numbers (197, 187) you also have to worry about whether they were taken on the same scale. Brinell hardness can use either 500 Kg or 3000 Kg as a standard load, and the values will vary. To illustrate, a BHN of 189 using 500 Kg translates to about 228 BHN using 3000 Kg: hence 187...

As CoryPad noted, 4130 at HRC 42 would make sense. Also, 431 is a hardenable stainless, rather close to "430" in name, for which HRC 42 is reasonable. But 430 at HRC 42? That just ain't right...

TVP, grayseal said the black smut is removed with a rag. That doesn't happen with any QPQ processed parts I've come across. Well, any correctly processed ones, at least. grayseal, it's certainly worth chatting with another vendor to see if they'll claim they can solve your problem. Realize...

Such steels are ferromagnetic, and will pick up magnetism. Did you use a magnetic workholding fixture when you machined it, or did you test the bar with magnetic particle inspection? If so, then you could easily have magnetized it. Often after MPI one will degauss the parts to eliminate the...

Well, a lot of PVD coatings are in that thickness range. TiN and its variations are ceramics, and the TiN is a pretty gold color too, for even classier marketing opportunities! Some firms can deposit the PVD coatings using low substrate temperatures, so as not to overtemper your hardened...

There are a few commercial ceramics, primarily those toughened with zirconia, that have much better fracture toughness than sapphire (which is essentially alumina). Check out the offerings of Saint-Gobain or CoorsTek- they're worth at least a phone call to chat about Transformation Toughened...