8Cr13MoV blade steel is a 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 the composition, properties, microstructure, and possible uses of this Steel. We also have given our best pick in the market for 8Cr13MoV stainless 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. As you can see in the 8Cr13MoV steel composition, the presence of a high percentage of Cr and Mo makes this extremely corrosion resistant.
Higher carbon in 8cr13mov blade steel content on quenching develops martensite in a structure that gives higher wear resistance. This wear resistance further improves due to the nucleation of carbides of chromium and Vanadium in the tempering stage.
Weldability of 8cr13mov high carbon stainless steel is not recommended. With higher chromium content, carbides percentage is higher in this Steel, making it not suitable for welding.
Manufacturing and Heat Treatment
The process of 8Cr13MoV 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 an 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 relieve 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.
- The 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 Kershaw 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 8Cr13MoV steel knife 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 8Cr13MoV Tenacious Folding Knife
Spyderco 8Cr13MoV 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.
8cr13mov vs 440c
As compared to 8Cr13MoV blade steel, 440C has a higher carbon (0.95-1.2%) and chromium (16-18%) content. 440C is a high grade and high wear resistant steel having excellent edge retention.
While considering 8Cr13MoV vs 440c, you can say 440c is a step-up model if we talk about hardness and edge retention.
8cr13mov vs vg10
With a higher carbon content Vg10 is more corrosion resistant and harder than chinese steel but for daily use the 8CrMoV has still better edge plenty. Due to higher alloying the toughness of Vg10 is also lower than 8Cr13MoV.
Due to higher alloying content, while considering 8Cr13MoV vs vg10, one must know that vg10 is more prone to chipping, so for daily it is always better to choose 8cr13mov steel.
AUS 8 vs 8cr13mov
Aus 8 and 8Cr13MoV are almost similar in carbon content, however, the former is Japanese grade steel having 3 times more molybdenum and vanadium than 8Cr13MoV. Aus8 is slightly better in edge retention and toughness as compared to the Chinese variant.
While we are discussing Aus 8 Vs 8Cr13MoV, we must know that their purpose is their quality are comparable, however, in a little detail, we can say Aus 8 can take a bit more stress and it can not retain edge as Chinese variant. Chinese 8Cr13MoV high carbon stainless steel can keep a fine and sharp edge longer but it is more prone to chipping if it hits a harder surface.
8cr13mov vs 8cr14mov
As the name suggests 8Cr14MoV has slightly higher chromium content than Chinese steels and they both are the same in performance as knives with almost similar edge retention, toughness, and other properties.
Surely yes, with high carbon and chromium content 8Cr13MoV steels have excellent wear resistance, corrosion resistance, edge retention and high hardness. It’s a great steel for knife applications.
The high hardness of approximately 60HRC makes it easy to sharp 8Cr13MoV knifes.
The high carbon and chromium content makes 440c slightly better in edge retention and corrosion resistance than 8Cr13MoV.
D2 steel is a tool steel while 8Cr13MoV is considered as stainless steel. The cutting properties of 8Cr13MoV are better than D2 and it can be sharpen more easily.
1095 is plain carbon steel with lower corrosion resistance than the 8Cr13MoV stainless steel and it is quite brittle which makes it good for knifes that are not too thin. If ease of sharpening is considered 1095 is a good choice but for longer life, Chinese variant under discussion is a better option.
Kershaw chinese steel is a widely available knife with affordable price and excellent cutting properties. The most common Kershaw pocket knife include Cryo, Leek and Shallot are readily available and great in performance for everyday uses.