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I have a new prototype for a screw that doesn't seem to be performing as well as the competitors. They are self-drilling screws that are meant to drill into at least two panels of 18 gauge sheet steel. Normally, our self drilling screws have a #3 drill point at the end, but these have a sharp...

Hi all, Just a quick question for all you stainless steel experts out there. We make a special type of tapping screw from 410 stainless because of its hardening capabilities and our requirement to produce a hardened drill tip. In addition, these fasteners will be used in external environments...

Hi all, It has been requested that we add a test in our quality control to assess the straightness of our bolts and screws. Is there a standard way of performing this type of test, and what kind of equipment will be need to order? Thanks a lot, Jeff

What is the best test for determining the composition of an unknown steel? I have a sample that I am going to have sent out, and I'm wondering what the best/cheapest method is for determining the composition. Also, what is a good ballpark for how much a test like this will cost? Thanks, Jeff

Hi All, We had two lots of fasteners come in and we did a maximum bend angle on them as usual. One lot (Sample 2012/5/16) was capable of bending the 30 deg. requirement and well beyond in some cases. The other lot (Sample 2012/4/25) was consistently cracking prematurely. Both have a core of...

Hi all, I have various stress gauges mounted in a stationary unit and we are trying to design a monitoring system for these gauges. Is there a way to have these units send data over a couple hundred miles without the use of internet? My first thought was radio waves but we would need an awfully...

Hey all, I have bent galvanized rods that I am going to be testing for strain-age embrittlement. I would like to first remove the zinc layer via HCL prior to testing, and I don't want to introduce any other forms of embrittlement. Since it is A36 steel, is it safe to assume that hydrogen...

It has been requested that we look into making our non structural parts out of a recycled nylon called EnviroLon 6 (unsure of manufacturer). I was able to find mechanical properties for BASF Ultramid B3S Nylon, but I wasnt able to find any information on EnviroLon 6. The guy who does our molding...

Can electrical resistance be a good measure of the degree of yielding in a steel sample? If I have a steel plate and I measure it's baseline resistance and then subject that same plate to a cyclic bending test, would I get a measurable change in resistance? I know that certain metals will...

Is there a simple technique for determining the maximum hardness that steel can be processed to? If I have 1022 steel, how can I determine the max hardness value from carburizing or nitriding etc? Also, is there a way to create a localized alloy in a plain carbon steel through processing? In...

Is anyone aware of any cheap alternatives to galvanized sheet steel? Normally we use a G90 gauge 12 steel, but we are trying to diversify our product line by offering a more corrosion resistant product for fairly cheap. Is there an alternative to galvanizing that will offer greater corrosion...

Hi all, One of our departments is required to perform a simple breaking torque inspection on all fasteners that come in from the vendor. Traditionally, we just use a torque wrench and a vice to increase the torque until the bolt head breaks off. Obviously, this requires a great deal of time and...

I have a lot of small rods (o.150" diameter) made of C1018 and C1020 that have been case hardened by heat treatment. The only values that were specified to the supplier were a core of 35 HRC and a case of 50-58 HRC. The QC check for these rods is a 30 degree bend test and it turns out that some...

I was asked to perform a three point bending yield test on long threaded fasteners (screws), but the only standard I could find was for nails (ASTM F1575). I'm wondering if this standard will apply, or if I need to find something else entirely. Given the asymmetry of fasteners (different thread...

I am testing a few samples of 1" diameter steel rods and I would like to be able to classify the fractures as either ductile or brittle, or most likely somewhere in-between. Normally, I would send the rods to our contracted materials engineer but we just purchased a nice digital inverted...

Let's say I have a 1" diameter 1018 Steel Rod Coupled to a nut made of gold. If the setup is kept in a constantly replenishing salt water bath (3% NaCl), is there a way to calculate the theoretical mass loss of the steel rod after a given amount of time?

I am going to perform a standard tensile test on a fully threaded 5/8" rod. I had two fixture blocks made that are threaded for this bolt pattern, and the tensile tester holds onto these steel blocks when it pulls. The rod is 6.5" in length, and has a thread engagement of 1.5" on each side...

Can't seem to find a reliable source for the brittle transition temp for A36 steel. I don't need it exact, just an estimate. Thanks

Can someone please describe what is happening in steel during the strain aging process? I understand that if I cold work a piece of low carbon steel, it will naturally strain harden on its own at room temperature. If heat is applied, the strain-ageing process is accelerated and embrittlement can...