Question: Can You Temper Rebar?

Can you make a knife out of rebar?

Your place to buy and sell all things handmade This knife was completely hand forged from a piece of rebar with minimal waste.

It’s 8-1/4 inches overall with a 3-3/4 inch blade.

It’s great as a general utility and processing knife..

Should I quench in water or oil?

Water quenching is a rapid cooling, where water as a qenching medium extracts heat much faster. While oil as a medium will extract heat much slower, hence rate of cooling will be slower than water.

What is the best oil to quench a knife in?

The two most common food grade oils used in this process are peanut and canola oil. Both of these oils have high flash points which is good for the quenching process. You will need to preheat these oils to slightly higher temperatures when compared to commercial quenching oils (120 – 130 degrees Fahrenheit).

Is rebar wrought iron?

Nineteenth-century rebar was made of cast iron or wrought iron in square, flat, or round shapes. … However, steel rebar loses its tensile strength at relatively low temperatures and must be surrounded by concrete to make it fire resistive.

What temperature do you temper a knife?

To reduce the brittleness, the material is tempered, usually by heating it to 175–350°C (347–662°F) for 2 hours, which results in a hardness of 53–63 HRC and a good balance between sharpness retention, grindability and toughness.

Can you harden rebar?

Most other rebar is low carbon. If you don’t know the grade, it is best used for handles on damascus billets, and for making tongs. Heating it up and quenching it to see if it gets hard ,or will break, won’t tell you much. Most mild steel will harden somewhat.

What is the difference between tempering and quenching?

The process of quenching or quench hardening involves heating the material and then rapidly cooling it to set the components into place as quickly as possible. … Tempering is achieved by heating the quenched material to below the critical point for a set period of time, then allowing it to cool in still air.

What oil is good for quenching?

Mineral Oil Oil is a third traditional quenching agent, suitable for high-speed steels and oil-hardened steels, and in fact for any steel for which the required degree of hardness is achievable. Oil has a slower rate of cooling compared to either water or brine, but faster than air, making it an intermediate quench.

Can you quench steel in vegetable oil?

Quenching Oil. Vegetable oil, olive oil, peanut oil, motor oil, used motor oil, etc. It will all work. You do not want to use water, however. It is too harsh and will crack most steels.

Is rebar heat treated?

Rebar is made in all different grades, and it’s impossible to heat treat it consistently. If you want a good knife, go to the local scrapyard, and pick up some old coil springs and leaf springs from cars. They’re 5160 steel, which is fairly high quality, but make sure to anneal it before doing any serious work.

Can you make a knife without a forge?

You can make yourself a pretty good knife without a lot of expensive tools and without a forge. For the tasks that most of us use a knife for it is not necessary for the blade to be unduly hard. … The quality of a larger rasp is usually good enough to make a workable knife without the need to harden it further.

Can you forge with rebar?

Rebar is a readily available building material. There is lots of it around and it is pretty cheap. It is also pretty easy to work with. So, in terms of blacksmithing it is a nice material for beginners to work with.

Can you quench steel in water?

Water is an effective medium when the goal is to have the steel to reach maximum hardness. However, using water can lead to metal cracking or becoming distorted. If extreme hardness isn’t necessary, mineral oil, whale oil, or cottonseed oil may be used in the quenching process instead.

What is a railroad spike knife?

Hand-forged using over three decades of craftsmanship, the railroad spike knife is our signature wrought iron blade. … Take one of Northern Crescent Iron’s wrought iron knives with you on road trips, hunting trips, camping expeditions. Use it daily around the home, or just display it for all to see.

What can I use instead of an anvil?

fast14riot. Well you can use almost any large mass of solid steel. I have heard of people using 4″ square stock by about 12″ long stood on end in a bucket of sand. Make sure it is steel and not iron, but if you are just scrounging then I guess it doesn’t matter much.

Is rebar mild steel?

Usually standard rebar is recycled and tempered carbon steel. … Generally the way that rebar is controlled is by its mechanical properties – specifically yield strength. This is because it serves a purely mechanical function when reinforcing concrete.