High Carbon Steel Questions

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A few questions.  I am going to be making some flint and steel striker fire starters for some scouts, kind of like this:http://www.black-bear-haversack.com/...oducts_id/3494I tried with mild steel, but not much sparking there.  I found that you need to use high carbon steel.  Does high carbon steel come in 1/8-1/4 inch by 1/2" plate?  Can I use an old leaf spring in an application like this?  or any other ideas as to where I can scrounge up some high carbon steel?I do not have a forge.  I was hoping to just find something kind of flat that can be bent, cut, and welded.Any considerations when welding it?  I read some stuff about pre and post heating it, but that seemed to be speaking about 1" or thicker stuff.  Essentially, I plan on cutting an 8" and 4" piece, put a bend in the middle of the 8" piece, and weld the 4" piece onto one side.Any input would be appreciatedLast edited by jdh239; 04-18-2010 at 12:12 AM.The Lord has declared, "This is my work and my glory--to bring to pass the immortality and eternal life of man"  Moses 1:39Link: My name is John, and I am a member of The Church of Jesus Christ of Latter-Day Saints.-- ColdCreekWorks.com --
Reply:I checked the link you posted and the striker shown was made by hammering a section of coil spring flat, and then twisting the ends and wrapping them around to make a functional way to grasp the striker.  All in all, a nice looking piece of work.Sounds like you want something more functional, and less decorated.  I can't quite picture what you're going to have when you finish, based on the procedure you described.But regardless, you can weld that high carbon steel if you pre-heat it to about 450°F, weld rapidly, and then put in an oven and slowly cool to room temp.  You could also try packing it in very dry sand to insulate it and slow cooling.If the piece cools too quickly, the welds will crack; almost immediately.You might also explore brazing the joints in the striker.  Because this is a mechanical bond, with no melting of the base metal, you'll avoid some of the problems with welding high carbon steel.I'd start in a junkyard and check some old truck leaf springs with a file or your piece of flint; until you find something that the file won't cut or that produces a nice spark.Cutting high carbon steel can be tough, so you might want to consider using an oxy-acetylene torch to cut your spring down to size.  An abrasive saw will also work and give cleaner cuts.Good luck.Benson's Mobile Welding - Dayton, OH metro area - AWS Certified Welding Inspector
Reply:It's not so much the steel's carbon content as its surface finish.For example, a flint won't spark when scratched on a smooth forklift tine, yet will throw showers from lightly rusted low-carbon sheet. I'm thinking about  striker blocks based on  pocket-sized ignition point files... that is, if you can still buy them. :laughAlthough it's not very rustic, a common torch lighter flint that is threaded onto a short screw for a handle,  makes a great sparker.Good LuckLast edited by denrep; 04-18-2010 at 09:47 AM.
Reply:Here are some pics to show what I am kind of planning.  These are made from mild steel (below).  I do have a plasma cutter, so I can cut the leaf spring with that hopefully.What about welding high carbon steel to mild steel?  If I can find a leaf spring, and use it for the striker portion, that is all I care about.  I have enough of this other mild steel to make the handles. Attached ImagesThe Lord has declared, "This is my work and my glory--to bring to pass the immortality and eternal life of man"  Moses 1:39Link: My name is John, and I am a member of The Church of Jesus Christ of Latter-Day Saints.-- ColdCreekWorks.com --
Reply:It's not so much the steel's carbon content as its surface finish.
Reply:Long ago I was found that some old pushrods I had lying around worked well for this purpose; I have no idea which engine they came from, but know that others were no good, and the ones which were had high carbon content and weren't 'stainless' alloys either. They were long enough to hold easily when using, but didn't fit into a pocket well.IIRC, they worked well with any sharp, tough rock including obsidian and well-opalized petrified wood.
Reply:The jumbo fire starters are cool, but to be more practical shouldn't carried gear be light-weight, compact, and multi-functional. I'm thinking that a small trip of steel attached to some existing piece of gear would be more practical than an all-out fire starter.Try scratching a common striker flint on a common piece of used steel; the results will surprise you. I have the pics somewhere but I don't feel like digging for ‘em right now - maybe later.Good LuckLast edited by denrep; 04-18-2010 at 01:35 PM.
Reply:I'd guess the point is to make something representitive of an older period and yet still somewhat practicle. And yep, I'd also think small and light weight is a big issue too as well as a knarly surface to facilitate breaking off as many little chips as possible. Thinking about it I wonder just how many of the steels in ole Daniel Boones' day were really "high carbon" so to speak. Carbon from the forge 'n fire probably. Those of old you were chipping off a piece of this "high carbon" steel with a piece of flint and under force and friction. Probably iffy at best and a true treasure when you actually got your hands on a good piece of steel. . In fact I don't think todays flints are even flint. They are specially formulated pieces of steel, "fire steel". Combinations of magic mix that generate tons of sparks when you scrub off the particles with just about anything hard and sharp. I'm not sure that the "flints" in a lighter or the "flints" in your torch lighter even have any flint in them. They are actually pieces of fire steel and a serrated wheel or rod abrades them off to get the sparks. I think this going back to Daniels Boones day should be fun and a good lesson for the kids in getting by with materials at hand. Good luck.   Survival skills with less than a Walmart close by.Or maybe I should say "how man suvived before Cabellos". Last edited by Sandy; 04-18-2010 at 02:02 PM."The things that will destroy America are prosperity at any price, peace at any price, safety first instead of duty first, the love of soft living and the get rich quick theory of life." -Theodore Roosevelt
Reply:Originally Posted by SandyI'd guess the point is to make something representitive of an older period and yet still somewhat practicle. And yep, I'd also think small and light weight is a big issue too as well as a knarly surface to facilitate breaking off as many little chips as possible. Thinking about it I wonder just how many of the steels in ole Daniel Boones' day were really "high carbon" so to speak. Carbon from the forge 'n fire probably. Those of old you were chipping off a piece of this "high carbon" steel with a piece of flint and under force and friction. Probably iffy at best and a true treasure when you actually got your hands on a good piece of steel. .
Reply:ESAB's Sureweld 716P SMAW rod sounds interesting.Sureweld 716P contains a special lime coating which permits trouble-free welds on “difficult” steels such as high-carbon, alloy, high-sulfur, free-machining and cold-rolled steels. The soft arc drive produces a good back bead in the open root and the stable arc will permit optimal deposits in both vertical up and down positions. The bead profile is smooth and slag can be easily removed. Sureweld 716P is designed for pipe up to API 5LX65. High amperages with corresponding high deposition rates make it more economical than conventional types on heavy work.JasonLincoln Idealarc 250 stick/tigThermal Dynamics Cutmaster 52Miller Bobcat 250Torchmate CNC tableThermal Arc Hefty 2Ironworkers Local 720
Reply:Originally Posted by Oldiron2Long ago I was found that some old pushrods I had lying around worked well for this purpose; I have no idea which engine they came from, but know that others were no good, and the ones which were had high carbon content and weren't 'stainless' alloys either. They were long enough to hold easily when using, but didn't fit into a pocket well.IIRC, they worked well with any sharp, tough rock including obsidian and well-opalized petrified wood.
Reply:Originally Posted by SandyI'd guess the point is to make something representitive of an older period and yet still somewhat practicle. And yep, I'd also think small and light weight is a big issue too as well as a knarly surface to facilitate breaking off as many little chips as possible. Thinking about it I wonder just how many of the steels in ole Daniel Boones' day were really "high carbon" so to speak. Carbon from the forge 'n fire probably. Those of old you were chipping off a piece of this "high carbon" steel with a piece of flint and under force and friction. Probably iffy at best and a true treasure when you actually got your hands on a good piece of steel. . In fact I don't think todays flints are even flint. They are specially formulated pieces of steel, "fire steel". Combinations of magic mix that generate tons of sparks when you scrub off the particles with just about anything hard and sharp. I'm not sure that the "flints" in a lighter or the "flints" in your torch lighter even have any flint in them. They are actually pieces of fire steel and a serrated wheel or rod abrades them off to get the sparks. I think this going back to Daniels Boones day should be fun and a good lesson for the kids in getting by with materials at hand. Good luck.   Survival skills with less than a Walmart close by.Or maybe I should say "how man suvived before Cabellos".
Reply:Originally Posted by 76GMC1500Those must be the old cast iron pushrods out of Pontiac and Cadillac engines of the 60's and 70's.  Cast iron has a substantially higher carbon content than any steel alloy.