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Lighting the fire:

This chapter is the beginning of this passion that led us to make the first forged knife.

Think before you begin so that we are finally making the knife, which kind of use we will give you, and we can do really.

Maybe today you are with little equipment and only have a bracero fan powered by a hand, or may already have your own gas forge . These early questions are you going to do whenever I started a new project.

Let us then choose, if we can, a steel that is right for our knife. Try to learn as much as possible the steel, the source, if possible, manufacturer and all the technical details of the recommended heat treatment.

Many times, especially at the beginning of our trip did not even know where to go to buy steel or just do not know how to ask for steel.

This is simple. The plates are grouped by characteristics that make them up, ie the component that predominates in the "mix" will give Steel name or number.

So much so that the steel SAE by the acronym in English are numbered for each item. For example, carbon steels always start with number 1, the number that follows is the amount of this component has. For example the 1045 steel has 0.45% carbon and 0.95

1095

continued in the table can see the classification used for the SAE steels and that number corresponds to each steel.

12xx Carbon Steels 10XX Only 1.00% max carbon 11XX free machining Refulcirizado Refulcirizato free machining Refosfatado 15XX only carbon, 1.00-1.65% Mn Manganese Steels 13xx 1.75% Mn nickel steel 23XX 3.50% Ni 25XX 5.00% Ni Chromium Nickel Steels 31XX 1.25% Ni, Cr .65 -. 80% 32XX 1.75% Ni, 1.07% Cr 33XX 3.50% Ni, 1.50 to 1.57% Cr 34XX Ni 3.00%, 0.77% Cr Aceros al Molivdeno 40XX Mo .20-.25% 44XX Mo .40-.52% Aceros Cromo Molibdeno 41XX Cr .50-.95%, Mo .12-.30% Aceros Níquel Cromo Molibdeno 43XX Ni 1.82%, Cr .50-.80%, Mo .25% 47xx 1.05% Ni, Cr .45%, Mo .20 -. 35% Nickel Molybdenum Steel 46XX Ni .85-1.82%, Mo .20 -. 25% 48XX 3.50% Ni, Mo .25% Chromium steels 50XX Cr .27-.65% 51XX Cr .80-1.05% 50XXX Cr .50%, C 1.00% min 51XXX Cr 1.02%, C 1.00% min 52XXX Cr 1.45%, C 1.00% min Aceros Chrome vanadium 61xx Cr .60 -. 95%, V .10 -. 15% Aceros tungsten chrome 72xx W 1.75%, Cr .75% Nickel Chromium Molybdenum Aceros 81xx Ni .30%, Cr .40%, .12% Mo 86xx Ni .55%, Cr .50%, .20% Mo 87xx Ni .55%, Cr .50 %, Mo .25% 88xx Ni .55%, Cr .50%, .35% Mo Silico Manganese Steels 92XX If 1.40-2.00% Mn .65-.85%, Cr 0-.65% Aceros Níquel Cromo Molibdeno 93XX Ni 3.25%, Cr 1.20%, Mo .12% 94XX Ni .45%, Cr .40%, Mo .12% 97XX Ni .55%, Cr .20%, Mo .20% 98XX 1.00% Ni, Cr .80%, .25% Mo

But of all these which serve us for cutlery? , the idea is that steel cutlery is at least 0.50% carbon. But why? The amount of carbon is what gives you the ability to acquire the steel hardness is what differentiates it from simple iron.

Other components we will be adding properties in the final balance. For example, a carbon-chromium steel, such as 5160, in addition to 0.60% carbon is 0.80 to 1% chromium which adds better edge retention and greater resistance to oxidation, but oxidized it is less than the 1060. On with the numbers. The 52100 has 1 to 1.10% carbon and up to 2% chromium. So we have a steel having the maximum amount of carbon added to the chrome double the 5160.

Below you will see a table of steels used for cutlery. Do not panic if you do not know any because many are with their trade names.

Once we get the steel either purchased or recycled try to find out what type it in order to complete the heat treatment. Below you will find a list of the most common steels can be found in pottery from around the world and its possible uses.

Agricultural Tools 1080

Bearing Bolillas 52100

tape Sierra L6

Clutch Disc 1070

Spirals Cushions 5160

Rods engine 1040

Cigüeñal 1045

wicks m2

Quotes of vetilador 1020

Files W2

Engranajes transmission 3115

Disc Plow 1080

Industrial Knives m2

Piano String 1085

railroad tracks 4140

Railroad Nails 1020

suspension Elastics 5160 / 9260

mechanical saws saw m42

steel But what use?

I recommend you start with the most basic and easy to work. That allows us to make mistakes and it's not too expensive. For this the ideal is the 5160, it is achieved price at the battery, and is also easily accessible by the china shop.

If ever you have questions about steel I recommend you do a simple test. Smoothly is to support the piece of steel on a stone or a grinding machine and see what kind of sparks out to do.

Iron or 1030. As shown in the photo sparks are thin and long, and mostly linear.

In this case the steel is 52100. The sparks are more crowded and a short distance from the abrasive contact form "clusters" difurcan or forming stars. This tells us that we are facing steel and not iron.

With the passage of time and the various tests that can gauge fencing by the eye and come to realize how much is in each sample.