Question: Is Rebar Good For Knives?

Can rebar be hardened?

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 type of metal is rebar?

Carbon steelSteel Reinforcing Bar (Rebar) Carbon steel is the most common form of steel rebar (short for reinforcing bar or reinforcing steel). Rebar is commonly used as a tensioning device in reinforced concrete and reinforced masonry structures holding the concrete in compression.

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).

Do you need rebar for 4 inch slab?

No, depending on your proposed loads. But a 4″ thick slab really shouldn’t have rebar in it, too thin. Most thing slabs, like driveways or sidewalks have a wire mesh reinforcement in them not rebar. 6x6x10/10 mesh is typical.

Is there anything sharper than obsidian?

Since obsidian will fracture down to a single atom, it is claimed to have a cutting edge five hundred times sharper than the sharpest steel blade, and under a high magnification microscope an obsidian blade still appears smooth, whereas a steel blade has a saw like edge.

Why do you quench knives in oil?

The oil in the quench tank causes the steel to cool rapidly and evenly. If the steel does not cool evenly for some reason, then the blade can warp or even fracture. … Quenching traps cementite within the ferrite and creates a very hard steel called martensite. Now that the steel is hardened, it can be tempered.

What is the best metal to make a knife out of?

The best metals for making knives are: Tool Steel. Carbon Steel. Stainless Steel.

Can you use vegetable oil to quench a knife?

Quenching Oil. Realistically, just about any kind of oil would work for this. Vegetable oil, olive oil, peanut oil, motor oil, used motor oil, etc. It will all work. You do not want to use water, however.

What is the best steel for beginner knife making?

If you want to do your own, regular carbon steel would probably be better. O1, 1095, 5160, are all reliable steels, that are not to hard to treat at home. O1 can be purchased at any machine shop supply place.

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.

Why are steels quenched in oil not water?

Water-quenched steels will generally be harder than oil-quenched steels. This is mainly because the thermal conductivity of water is higher than the thermal conductivity of most oils (that I know); consequently, the rates of cooling will be less rapid (or lower) in oils compared with water.

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 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.

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 rebar be tempered?

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.

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.

Is more rebar better?

Rebar characteristics Concrete engineers will choose the proper grade and thickness depending on the needs of the concrete installation. As you might imagine, thicker rebar is stronger.

Is all rebar weldable?

In general, only steel rebar that is “Grade W” can be welded. … Rebar that is not produced to the ASTM A706 specification is generally not suitable for welding without calculating the “carbon-equivalent”. Material with a carbon-equivalent of less than 0.55 can be welded (AWS D1. 4).

What is the hardest steel for knives?

Carbon steelCarbon steel is a popular choice for rough use knives. Carbon steel used to be much tougher, much more durable, and easier to sharpen than stainless steel. They lack the chromium content of stainless steel, making them susceptible to corrosion.

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 is needed to forge a knife?

Starter Kit ($500)Workbench.5″ Angle Grinder (cutting and shaping blanks)1mm Angle Grinder discs (great for cutting out shapes)Good set of Files (shaping bevels)Sandpaper 180, 320, and 600 Grit.Small Drill Press (difficult to make straight holes without one)Bench Vice (buy one or make your own)More items…