Which is better, 5cr17 or 8cr17 steel

8Cr17, in the hardened state of stainless steel, is harder than 7Cr17 and tougher than 11Cr17. It is used as a cutting tool and valve.

Foreign name: 8CR17 standard: GB T 1220-1992, silicon si, carbon c

Features and scope of application:

8Cr17, in the hardened state of stainless steel, is harder than 7Cr17 and tougher than 11Cr17. It is used as a cutting tool and valve.

Chemical Composition: Manganese Mn:

Sulfur s:

Phosphorus p:

Chromium Cr: Nickel Ni: Allowed to contain

Molybdenum mo: can be joined

Mechanical Properties: Hardness: Annealed, 255HB; Quenching and tempering, 56HRC

Heat treatment specifications and metallographic structure:

Heat treatment specifications: 1) annealing, 800 920 slow cooling; 2) Quenching, 1010 1070 oil cooled; 3) Tempering, 100 180 quick cooling.

Metallographic structure: The tissue is characterized by a martensitic type.

Delivery status: generally delivered in a heat treatment state, and the type of heat treatment is indicated in the contract; If not indicated, it will be delivered in a non-heat-treated state.

This carbon content will be a bit soft, and stainless steel is difficult to heat treat. If there is 8cr13mov or 440c, it is better, the former is a commonly used blade wood for three-edged wood, and the latter is more expensive, and domestic imitation survival knives are used more.

7CR17 belongs to the national standard martensitic stainless steel, and the executive standard: GB T20878-2007.

7Cr17 stainless steel is hard in the hardened state, but it is tougher than 8Cr17. It is used as cutting tools, measuring tools, and bearings. 7CR17 stainless steel is a parts, cellar and equipment with high strength that is resistant to nitric acid and organic acid corrosion.

What are the precautions for stainless steel maintenance: 1. Stainless steel must be paid attention to when cleaning, because many detergents contain a large amount of acid and alkali, and it is easy to corrode stainless steel for a long time, and it is easy to rust after a long time.

2. After the stainless steel is cleaned, the surface of the stainless steel must be wiped dry with a dry cloth, and then stored in a dry and ventilated environment, if the environment is very humid, the acid-resistant steel on the surface of the stainless steel is easy to be oxidized, and after a long time, even the best stainless steel will rust.

3. The surface of stainless steel is smooth, and it seems to be very easy to clean, but in fact, there are many things that need to be paid attention to, in addition to not having strong acid or strong alkali detergent, it is also necessary to avoid cleaning with steel wires and other items that may scratch stainless steel, so as not to leave indelible traces.

4. Because stainless steel is very resistant to falling and cost-effective, many people like to use this kind of dishes, but it should be noted that the dishes should not be left overnight, because there is a lot of salt in the dishes, which is easy to have a chemical reaction with stainless steel, and long-term use is not good for the body.

7Cr17MOV has higher hardness, wear-resistant but not rust-proof, 9Cr17MOV rust-proof, sharp, according to individual needs, choose the right knife.

CR18MOV has good rust resistance, and is currently used in the high-grade batch tool market, with strength and sharpness compared to ATS-34, with a chromium content of up to 16-18%, which is the second most commonly used stainless steel (second only to ATS-34) and the first stainless steel accepted by knife makers.

CR17MOV is a special alloy steel, not stainless steel. The two digits at the beginning of the steel number indicate the carbon content of the steel, and the carbon content of 7cr17mov is lower than that of 9cr17mov and the hardness is greater than that of 9cr17mov.

Extended information: Chinese kitchen knives are roughly divided into: mulberry knives, slice knives, Wenwu knives, bone chopping knives, Jiujiangwan, and roasted meat.

knives, slap knives and duck slice knives.

1. Mulberry knife: rectangular, thin and narrow, usually black and white, the lightest and most used is it, cutting meat and vegetables, can not be used to cut bones, because the seam angle is very small, easy to jam the knife.

2. Slice knife: rectangular, the slice knife is wider than the mulberry knife, so the name is used to slice things, and it can be used to slice transparent meat slices (and the function of the mulberry knife is almost as slim), it will generally be a little heavier, and it can be used to cut bones (also known as the literary knife).

3. Wenwu knife: rectangular, thicker than the knife with a large opening angle, it can be used to cut chicken bones, can also cut vegetables, can be chopped, can be cut, can be scraped, modern families use the most and most extensively.

4. Bone chopping knife: rectangular demolition of Chi Town, the abdomen of the knife is prominent, large, thick and heavy, used to cut off ribs, fish heads, chicken thigh bones and other bones, the blade edge is blunt.

5. Jiujiangwan: The general hotel is always available, the knife head is obviously wider than the knife tail, the back of the knife is arc-shaped, the meat is opened, the head is big and the back is thick, and the big bones are cut.

6. Roast wax knife: used to cut cooked food, sausages and the like.

7. Leather knife: specially used to shoot shrimp dumplings.

A knife with a dough, no blade.

8. Duck slice knife: used to slice Peking duck.

The knife is long and narrow, usually about 5cm wide and narrow.

Hello dear! Glad for your question. Which is better, 12C27 steel or 8Cr13Mov steel:

12C27 steel is good. The disadvantage of 8Cr13 is that it is easy to rust, and once the surface is damaged, it will rust in less than a week. After heat treatment, 8Cr13 can reach about 58 degrees, and the wear resistance and sharpness are still very strong.

12C27 is a high-performance steel grade in the knife steel market. It has excellent cutting edge performance, which makes the Pihan blade sharp, hard, tough, and has good corrosion resistance. The hardness range is 54-61HRC, with high toughness, excellent sharpness, and good corrosion resistance.

12C27 is the recommended steel material for hunting knives, small folding knives, high-end chef knives, and tactical knives. This steel can be precision punched, which helps to improve production efficiency.

7cr17mov and 9cr18mov which steel is better for knives? : 7cr17mov hardness is higher, wear-resistant but not rust-proof, so it will rust. 9CR17MOV rust resistance, sharp, according to personal needs, choose the right knife CR18MOV rust resistance is good, is currently used in high-end batch knives in the market of high-quality stainless steel, its strength and sharpness is more than ATS-34, containing as much as 16-18% of the chromium content of the Qingshi, is the second most common limb with stainless steel (second only to ATS-34), but also the earliest stainless steel accepted by the knifesmith.

Summary. Hello, 7CR17MOV special high-carbon alloy steel, this steel can be used as a tool, the chromium element can generate an invisible but very dense chromium oxide film, to prevent the corrosion of the steel, so that the tool is durable. Molybdenum mainly strengthens the corrosive effect of chromium in steel, so that the tool remains long-lasting sharp.

Vanadium has the ability to deacidify and remove oxygen in steel, so that the cross-section of the steel is crystalline and dense, and has higher strength.

7CR17MOV steel and AUS-8A steel are good and used to make knives.

Hello, 7CR17MOV special high-carbon alloy steel, this steel can be used as a tool, the chromium element can generate an invisible but very dense chromium oxide film, to prevent the corrosion of the steel, so that the tool is durable. The molybdenum element is mainly to strengthen the corrosive effect of the sensitive chromium element in the steel, so that the tool remains long-lasting sharp. Vanadium has the ability to deacidify and remove oxygen in Shenli steel, so that the section of the steel is crystallized and dense, and has a higher degree of strong finger blindness.

AUS-8AUS-8 is a kind of non-dismantling rust steel developed by Aichisteel of Japan, and AUS steel grades are divided into AUS-6, AUS-8, and AUS10 (or 6A, 8A, 10A). Compared with the general performance of AUS-6 steel, AUS-8 is more hardenable and wear-resistant. For the vast majority of users, AUS-8 can be said to be a very good steel, and the hardness of this steel can reach HRC58-59.

Hello, based on the above analysis, AUS-8 is more suitable for making tools, and the performance is perfect in all aspects. 7cr17mov is a kind of spring steel, and it can also be used as a knife, but after all, it is brittle, and it is easy to cut something, that is, to jump a piece, and then you know, it is okay to cut dry and difficult vegetables.

7cr17

and 9cr18

All are martensitic stainless steel.

The specific composition can be seen in GB T

It can be seen that the carbon content of 7Cr17 is between, the carbon content of 9Cr18 is between, and the chromium content of 7Cr17 and 9Cr18 is about the same, and the composition range is crossed.

Hardened.

7Cr17 stainless steel.

The hardness is a little lower than 9cr18, but the toughness is higher than that of 9cr18, and 9cr18 is more wear-resistant. Actually, there is no essential difference, just like.

45 steel and. 60 steel

T8 steel with. T10 steel.

The difference is similar.

7CR17 is a high-chromium martensitic stainless steel, which has higher quenching hardness than 420, has high strength and hardness in the quenching and tempering state, and has stainless corrosion resistance.

1. 7CR17 corresponding grades: 1. National standard GB-T standard: digital grade:

S41070, new grade: 68CR17, old grade: 7CR17,2, American standard:

ASTMA Standard: S44002, SAE Standard: A, UNS Standard:

440A, 3, Japanese standard JIS standard: SUS440A, 4, German standard DIN standard: , 5, European standard EN standard:

x70crn 015。

2. 7Cr17 chemical composition: carbon c: , silicon si:, manganese mn: , phosphorus p: , sulfur s:, chromium cr:, nickel ni: charge xujia, molybdenum mo:

Charge allowable addition, nitrogen n:—, copper cu:—, other elements:

3. 7Cr17 physical properties: density density (20).

kg , melting point :1371 1508 , specific heat capacity (0 100 ) kg (, thermal conductivity w (

100 , thermal conductivity w (

500 -: coefficient of linear expansion.

10-6/k)

0 100 , linear expansion coefficient (10-6 k).

Resistivity (20).

ω.mm2 m), longitudinal modulus of elasticity.

20) GPA:200, Magnetic:Yes.

4. 7Cr17 mechanical properties: Delivery status: solution treatment of bars, solution pickling of plates, tensile strength (rm mpa):

590, Elongation strength (:245, elongation a %: 15, section shrinkage (z %):

One. 5. 7CR17 heat treatment: hardness HBW: annealing 255, hardness HRB: quenching and tempering 54HRC, heating temperature: 800 920, heating method: slow cooling.

7CR17 application field: generally used to make cutters, measuring tools, shafts, valves, hooks and other corrosion-resistant parts that require stainless or dilute oxidizing acids, organic acids and salt corrosion.

Both 5Cr and 7Cr steel are good, due to the high carbon content, the hardness of the slip sign after quenching can reach HRC58. The high CR in the product can improve the hardenability and wear resistance of the steel, and can change the hole to make the corrosion resistance and oxidation resistance of the slippery steel. The above molybdenum content in the product can significantly improve the hardenability and thermal strength of the steel, prevent tempering brittleness, and improve toughness, wear resistance and corrosion resistance.

The vanadium in the product can refine the grain structure in the steel and improve the strength, toughness and wear resistance of the steel.