8Cr13MoV is Chinese stainless-steel grade used commonly for home scissors and knives. The comparable hardness, low cost and ease of manufacturing enabled 8Cr13MoV Steel to gain popularity in kitchen knives. Chinese grade is equivalent to Aichi AUS 8 steel with carbon content to the higher side. In this article, we have enlisted composition, properties, microstructure and possible uses of this SteelSteel. We also have given our best pick in the market for 8Cr13MoV blade steel brands.
What is 8Cr13MoV Steel?
8Cr13MoV Stainless Steel is a high carbon – high chromium alloy used mostly for kitchen knives. This type of Steel usually contains several primary and secondary carbides along with cementite which is responsible for higher hardness and cutting ability.
8Cr13MoV steel composition
|C||0.7 - 0.8|
|Cr||13.00 - 14.50|
|Mo||0.10 - 0.30|
|V||0.10 - 0.25|
8Cr13MoV steel Mechanical Properties
Here, the hardness of blade steel is measured using Rockwell hardness tester.
|Tensile Strength||1315 Mpa|
|Hardness (Rockwell)||57.6 HRC|
With higher hardness, edge retention is also higher compared to mild carbon steel.
Stainless steels usually contain higher chromium content which prevents rusting or oxidation of Steel.
Higher carbon content on quenching develops martensite in a structure which gives higher wear resistance. This wear resistance further improves due to nucleation of carbides of chromium and Vanadium in the tempering stage.
Weldability is not recommended for higher carbides containing steels. With higher chromium content, carbides percentage is higher in this Steel, making it not suitable for welding.
Manufacturing and Heat Treatment
The process of Blade steel starts from melting and goes all the way to heat treatment.
- Firstly, the composition selected is melted in a Vacuum Induction Furnace and cast in Die mold. For die Steel, we usually use D2 Steel, W1 Steel, or some related die steel.
- Moulded SteelSteel is forged into electrode for electro slag re-melting in the presence of the Argon atmosphere.
- Re-melted Steel forged again to achieve a martensitic structure. The martensitic structural formation found in the TTT diagram of Steel.
- After forging, the spheroidizing process primarily used to improve cutting ability and to relive stresses generated in forging. The reason for spheroidizing can be understood by reading the article, “Annealing Types”. In this article, the relation of carbon percentage to spheroidized microstructure is mentioned for higher cutting ability.
- Tempering temperature used is 180-150o C.
- Heat Treat cycle is given in the figure below;
8Cr13MoV steel uses
With spheroidizing of Steel, the cutting ability of Steel dramatically enhances. That’s why the primary use of Chinese 8Cr13MoV Steel is the manufacturing of scissors and knives. The classes of knives which use this SteelSteel are;
- Survival Knives
- Budget Knives
- Folding Knives
- Kitchen Knives
How to determine cutting ability of blade steel?
Process of cutting in case of blade knives depends upon three main characteristics;
- Cutting Edge shape
- Steel Properties
- Edge Angle
Kershaw Cryo Pocket Knife
The pocket can be made of 8Cr13MoV Steel can be very handy for any hiker, electrician or anyone for day to day use. For a somewhat simpler task, this blade can last for a long time.
Kershaw Brawler Folding Knife
Kershaw is premium blade offering in this Steel a folding knife. This steel blade is considered best for its price. With Chinese blade, it does not mean properties are compromised. The Steel offers comparable features to other blades and can be used for regular day to day tasks.
Spyderco Tenacious Folding Knife
Spyderco folding knife is considered best made having superior quality and tenacious design. The design of this brand offers better edge retention making it superior in quality to other branded steels.