A letter or brand indicating the manufacturer shĪll be pressed on the head of each spike while it is being formed. T cold through 180 degrees flat on itself without cracking on the outside portio "A low carbon track spike will not contain greater than 0.12% carbonīending properties: The body of a full size finished spike shall stand being ben Two sizes of track spike are identified, one of 5/8 inch square shaft and Two classes of track spikes are given specifications, both low carbon and high cĪrbon. Original document, 1926, revised last in 1968 If we want to make it into a knife, fine they are cool Only I feel its pushing it to expect magic for edge holding."American Railway Engineering Association's Specifications for Soft-Steel Track Spikes. It was made to hold RR track to the ties, and they have done a wonderful job of that for many years. Remember it was a large Nail, it never wanted to be a knife. The cost for scrap at 40 cents a pound is not that far from the $4 per pound of buying real knife steels when one looks at how much metal it really takes to make a knife, or steel an edge. Same as getting a RR spike to hold a good edge. But there have been very few that test that high in the real world. I know and have proof that human beings can have an IQ above 180. However, we refer to them as high carbon, they are not within the range of steels known as high carbon or hypereutectoid according to the steel industry standards, and have not been since at least 1926, when most track spikes were previously manufactured from wrought iron." The consequences for the industry would be too great to consider. A bent spike still holds the rail while a fractured spike would not. After all, brittle spikes would not be desirable as a track spike. "Because of the bending tests required, the carbon content will not be greater than 0.30%. When copper is specified, the letters "CU" shall be added."Īdditionally included in a fax to Mike Blue by the gentleman at Wellington industries, a division of Sheffield Steel: Marking: A letter or brand indicating manufacturer and also the letters "HC" indicating high carbon, shall be pressed on the head of each spike while it is being formed. Bending properties: The body of a full size finished spike shall stand being bent cold through 120 degrees around a pin, the diameter of which is not greater than the thickness of the spike without cracking on the outside portion of the bent portion. Carbon not greater than 0.30%, nor greater than 0.20% copper. 2-3: Specifications for high carbon steel track spikes 1968. One thing we can indeed state empirically about diffusion rates: plenty of smiths throughout history have welded steel to iron to make serviceable tools. Complicated stuff! Not the kind of thing about which we should be tossing absolute statements. The diffusion coefficient of carbon in iron is dependent on concentration. Look up "Fick's Second Law of Diffusion" using your favorite search engine. Nobody has defined "medium" yet in this thread. Regarding diffusion rates, (whales migrate, carbon diffuses) "Fast" and "slow" don't have any numbers attached to them. Also, just because one can get 55Rc at 0.30% carbon (or 60Rc at 0.40%) does not mean one will get it. They do change the amount of time you have to get there. To me that seems a little hard to believe in the real world (outside of something like H13, with really high alloy content), which is why I hedged my bets a bit.Īlloying elements other than carbon and boron have no effect on how hard the steel can get. Grant, I've seen a couple charts in different engineering/metallurgy texts that say 0.3% C can reach 54-55 RC.
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