SPECIFICATIONS:

Name of the knife: GAUCHO-STYLE exclusive handmade knife by studio master SERHIA DROZDA, buy order in Ukraine (Steel - SRM S90V 62 HRC)
Type of knife: Fixed blade
Brand: Studio of exclusive handmade knives SERHIA DROZDA

A sharpened knife is not a cold weapon.

Our knives are very sharp, so be very careful when opening and handling them. We are not responsible for any injuries related to the use of our knives.
Our products are intended for legal use only by responsible buyers. We will not sell our products to anyone under the age of 18.

Availability changes regularly, after confirming your order we will notify you of availability or when the item is ready. The product may differ slightly from the one shown in the photo.

M390 steel: composition, interpretation and application

Damascus steel has long held a leading position in terms of strength, reliability and durability. Modern technologies have made it possible to obtain a new type of material with the best performance - M390 steel. It was first introduced in Austria by Bohler-Uddeholm AG in the early 1990s.

Due to its high technological characteristics, the material quickly gained recognition and began to be used for the manufacture of knives. Its main properties include:

• Hardness (60-62 HRC), due to the unique structure of crystal lattices with a solid structure. Such a result was obtained on the basis of careful checking of the composition and ratio of components. M390 steel can be hardened, which significantly increases its strength.
• Use of vanadium and tungsten. Knives are sharpened using desktop units, because The use of water stone will significantly complicate the process. After such processing, the knife remains sharp for a long time.
• The possibility of mirror polishing due to the high hardness of the metal. The smooth polished surface of M390 steel is characterized by the same reflective ability as a mirror.

Decoding and chemical composition
Today, the composition is widely used for the manufacture of cutting objects, including knives. It refers to the materials of the powder method of production, during its processing, raw materials are crushed and baked in molds at a temperature of up to 1500 degrees. This allows the use of a significant part of alloying elements, which improves the characteristics of M390 steel.

Metal development was carried out on the basis of EU standards, according to which the chemical composition of M390 steel, in addition to iron, includes:

• Carbon in the amount of 1.85±0.05%. It is necessarily present in a metal of high hardness, connecting Ferrum (Fe) molecules to increase mechanical qualities. On the other hand, its presence impairs the manufacturability of processing and increases brittleness. However, steel is considered the optimal material in relation to brittleness to strength.
• Chromium is contained in steel in the amount of 20±1%. It is designed to improve mechanical performance and corrosion resistance as a result of heat treatment. With an increase in the concentration of this chemical element of M390 steel, an extension of the period of trouble-free operation under cyclic loading and abrasive impact is guaranteed.
• Silicon and manganese are contained in the metal in amounts of 0.7±0.1% and 0.25±0.05%, respectively. They are deoxidizers that prevent chemical elements from the air from entering the alloy during manufacturing. Due to them, chemical treatment is reduced, the strength and quality of the surface is increased.
• Molybdenum and vanadium are contained in the amount of 1% and 3-4%, respectively. They are characterized by a high melting point, which increases the material's resistance to elevated temperatures, stiffness and improves technical properties.
• Tungsten steel in the amount of 0.6±0.1%. It increases its strength and has the maximum effect on this indicator compared to other components.

Features of the material

The advantages of the alloy include:

• excellent plasticity with significant hardness;
• corrosion resistance, inability to oxidize in air and at t = 800 degrees;
• lack of reaction to the influence of many acidic and alkaline substances;
• preliminary heat treatment, which includes quenching and high relaxation;
• strength, which ensures destruction under a significant load, which is 1.4 times higher than the similar indicator of high-speed steels. The difference between yield strength and tensile strength is practically absent;
• knives with M390 remain sharp for a long time.

Disadvantages can be considered only the cost of the material, the difficulty of sharpening and grinding.

Knife from M390

Technical characteristics
M390 steel is characterized by the following basic parameters:

• melting point of 1300-1400 degrees;
• with a hardness of 65 units. according to Rockwell;
• strength limit of 900 MPa;
• at the beginning of failure 850 MPa.

Application
The metal is used for the manufacture of knife blades, surgical instruments, and industrial cutters. Knives are characterized by high hardness and the ability to withstand strong dynamic actions. They remain sharp for six months, subject to compliance with the rules of operation. The negative qualities include only the difficulty of sharpening, for which you will need special equipment - a machine. It is also important to have skills in this process.

Analogues

Only the American product Duratech 20CV can be considered an analogue of M390 steel, which is due to the recent appearance of the metal on the market.

I also recommend looking at the following steel brands:

40HN;
12H18N10T.

Steel CPM S90V. Composition and properties.
CPM S90V steel is a stainless tool powder steel manufactured in the USA. First introduced in 1999 by Crucible Industries. Good, fairly strong and wear-resistant steel with a hardness of 56-59 HRC. The carbide content is about 22% (see below). The basis for it was 420 steel with the addition of a large amount of vanadium and an increase in the level of carbon. There is conflicting information about the cutting properties of CPM S90V - someone (probably the sellers) praises it, and someone says that simpler steels can be looked at with such hardness. I won't argue here - you can always look, but the CPM S90V offers a significant improvement in wear resistance over the simpler 440C and D2, with corrosion resistance equal to or better than the 440C. The high content of vanadium in S90V contributes to the formation of harder vanadium carbides compared to chromium carbides, leaving more free chromium to provide corrosion resistance. In sharpening CPM S90V, it makes sense to prefer diamonds, elbors or silicon carbide stones. When using natural whetstones for the finish, I would look in the direction of not too hard stones.

Similar analogues:

(CPM™) is a proprietary Crucible technology invented in 1970. Without going into production details, a short list of the advantages of the CPM process: small grain size, improved viscosity, wear resistance, grinding, expected response to heat treatment, etc.

Composition of steel CPM S90V, %
C Cr Mn Mo Ni P Si SV Other
2.3 14 0.5 1.0 - 0.03 0.5 0.03 9.0 0.4(W)

PROPERTIES OF STEEL ELEMENTS:

• Carbon (C, Carbon): improves edge retention and increases viscosity; increases hardness and wear resistance; reduces plasticity; in high values, it reduces corrosion resistance.
• Chromium (Cr, Chromium): increases hardness, tensile strength and density; increase corrosion resistance (>11% makes the alloy stainless).
• Manganese (Mn, Manganese): increases calcination, wear resistance and viscosity; used as a deoxidizer and degasser to remove oxygen during metal melting; in large % increases hardness and brittleness.
• Molybdenum (Mo, Molybdenum): increases hardness, strength, calcination and density; improves machinability and corrosion resistance.
• Nickel (Ni, Nickel): adds impact toughness; improves corrosion resistance; reduces hardness.
• Phosphorus (P, Phosphorus): is considered a harmful impurity. It dissolves in ferrite, due to this, the strength increases, but the plasticity and impact strength decrease with an increase in the susceptibility of steel to brittleness. In low-alloy steels with about 0.1% carbon, phosphorus increases strength and resistance to atmospheric corrosion. It is considered a harmful impurity.
• Silicon (Si, Silicon): increases strength; used as a deoxidizer and degasser to remove oxygen during metal melting.
• Sulfur (S, Sulfur): is usually considered a harmful impurity that affects plasticity, impact toughness, weldability, corrosion properties, surface quality of steel, etc. The harmful effect of sulfur reduces the presence of manganese in steel. The sulfur content in quality steels does not exceed 0.02-0.03%.
• Vanadium (V, Vanadium): increases strength, wear resistance, increases density and viscosity; increases corrosion resistance by increasing the oxide film; vanadium carbide inclusions are very hard.
• Tungsten (W, Tungsten): adds strength, viscosity and improves ignitability; retains hardness at high temperatures.
• Cobalt (Co, Cobalt): increases strength and hardness, allows hardening at higher temperatures; enhances the effects of other elements in complex steels.
• Niobium (Nb, Niobium): limits the growth of carbides; limits workability; creates the hardest carbides.
• Nitrogen (N): used instead of carbon in the steel matrix (nitrogen atoms function similarly to carbon atoms, but have advantages in corrosion resistance).

The online store  Knife.net.ua  offers handmade knives, exclusive custom-made knives for discerning men and hunters, made by the hands of the best masters of Ukraine for use in hunting, in non-standard situations at a favorable price to order or to choose from in our store. A quality tool for individual use in the field or hunting. Delivery is carried out throughout Ukraine and the world within a few days. Knife.net.ua is the best selection of knives in Ukraine from handmade craftsmen.

Well,  you can buy a powder steel knife  on our website  knife.net.ua  or by contacting us by phone +380961711010

It is worth remembering that when using the knife for its intended purpose and with careful handling, the knife will serve you for a very, very long time

Ironwood - iron wood - handmade knives

Ironwood - Iron tree

In nature, ironwood is extremely rare, therefore it occupies an honorable place in the Red Book. However, in terms of its properties, each iron tree is not inferior to the density of cast iron. Its bark can withstand gunfire, but it sinks hopelessly in water. It is worth noting that this is not a separate class of trees, but a whole group assembled from different species. It includes several dozen species of plants with unusually dense wood. They can be found on every continent. Moreover, raw materials are used both in the industrial industry and in medical practice.

What is special about these trees?

With the naked eye, it is quite difficult to recognize the "stone" breed of a perennial plant. Especially if they are on the verge of extinction. However, they are characterized by the following features:

• the age of such long-lived people is not less than 2 hundred years;
• wood fiber is resistant to corrosion processes and does not deteriorate under the influence of strong acids;
• the bark contains many tannins that protect their "hosts" from all kinds of parasites, as well as from the rot fungus;
• the log will definitely go under water, since the density of wood is 1 t / m³, taking into account the humidity of 12%, for this reason, such breeds grow quite slowly;
• the height of each exceeds 25 meters, and the girth of the trunk reaches more than 200 cm.

All these properties are necessary for an iron tree to survive in the harshest climatic conditions. Sharp temperature changes in Russia, African drought or humid European climate will not be able to harm this natural phenomenon. Such varieties of trees perfectly adapt to any adverse environment. For this, they are equipped with a considerable number of devices, starting from the unique structure of the trunk / roots and ending with the chemical composition of the bark. In this regard, they are widely used in production:

• furniture;
• building structures;
• cars;
• cosmetics;
• decorative elements;
• underwater equipment.

Mammoth Tusk: A gem mined in permafrost

Most of our contemporaries are mammoths - "monsters, fierce, fierce, huge..." A large, disproportionately built elephant. A ferocious beast, densely overgrown with dense shiny or long brown and patchy wool. A four-legged hero with heavy tusks, who fearlessly chases polar bears. Or runs confusedly from a handful of crazy bipeds... This is what a mammoth is like in a performance by artists from science.
Are mammoths extinct?

It is believed that mammoths lived as long ago as dinosaurs. However, scientists have reliably established that the last herds of mammoths lived on Wrangel Island about three and a half millennia ago. The Pyramid of Cheops was already more than a thousand years old at that time. Moses was preparing his tribesmen for a forty-year dessert trip. The Mediterranean volcano Santorini, having exploded, buried the Mycenaean civilization for a hundred years.

These are herds; certain families of mammoths, according to the assurances of lovers of polar hunting solitude, exist safely to this day. Whether it is so or not is not known for sure. However, there is no doubt that in the past, mammoths lived everywhere in Europe, Asia, and America.

Permafrost is the best refrigerator for mammoth bone

Cemeteries of mammoth bones are found everywhere: in France, the Czech Republic, and Ukraine. But only where the earth has been in a state of permafrost for thousands of years, the mammoth tusk is preserved in its original (or almost original) form. One of the largest burial grounds in the world is Yakutia, in which a large amount of this highly valuable material is still mined annually. According to the estimates of experts in the North Yakutia province, the potential resources may amount to about 450,000 tons.

Humans at all times highly valued the fossil mammoth tusk. Dense, strong, massive, often white, usually yellowish, often colored with mineral salts in natural colors, mammoth bone has been used as a raw material for bone carving for many centuries.

Material that is well appreciated by kings and rulers all over the world!

Tsar Oleksii Mykhailovych, father of Peter the Great, established a state monopoly on mammoth bone back in the middle of the seventeenth century. On his initiative, the extraction and supply of mammoth tusks to bone-cutting workshops in Kholmogory and Moscow (Armory Chamber) became permanent.

Peter the First, fond of handicrafts, carved a snuff box from mammoth bone with his own hands. Foreign craftsmen also liked the material: among the goods traditionally delivered from Russia to the West, there was always a place for the bone of an extinct animal.

The only one allowed

Today, mammoth tusk is the only high-value bone material allowed for extraction and use. Elephant tusk, the well-known ivory, has been classified as prohibited materials. Similar decisions were made regarding the tooth of the sperm whale (in connection with the complete refusal to hunt whales) and the walrus tusk (which is mined by the northern peoples in small quantities).

Elk antler and femur (tubular femur of large animals) are not able to give the visual effect produced by mammoth bone products. The inner glow of figurines, warm shades of a living body, unparalleled plasticity of the smallest details - these are just some of the advantages inherent in mammoth tusk.

Universality, nobility, uniqueness

The physical qualities of the massif of mammoth tusk are unique. Modern technologies are only trying to create substances that are close to natural mammoth bone in terms of properties. Allowing the finest processing of details, giving the opportunity to create the illusion of soft draperies of clothes that naturally fall, the mammoth tusk has deservedly become the most sought-after material for bone carving.

Mammoth tusk of uniform structure is in particular demand. The uniformity of the color of the bone array, the absence of cracks and other defects allows the artist to create regardless of the quality of the material. However, the integrity of the massif of mammoth bone is now rare, and the defects of the material force the artist to be more inventive in the composition, which, as a result, turns into an additional dignity in the sculpture.

High-quality and original steel linings are an excellent decoration for exclusive and unique knives of the Studio of exclusive handmade knives by SERGEY DROZDA  (Ukraine), which offers to order and buy online store https://knife.net.ua