40Cr steel FAQS

What is 40Cr steel?

40Cr steel is an alloy structural steel. 40Cr alloy structural steel conforms to GB/T 3077 steel, and its quenched and tempered hardness is between 38~45HRc. Delivery hardening less than 250HB after annealing. The mechanical properties of 40Cr are very similar to 35CrMo. But the price of 40Cr is lower than 35CrMo4, which is more economical for users.

What is the chemical composition of 40Cr steel?

The chemical elements of 40Cr steel are as follows:

Carbon C:0.37-0.44

Silicon Si:0.17-0.37

Manganese Mn:0.50-0.80

Sulfur S:≤0.015

Phosphorus P:≤0.025

Chromium Cr: 0.80-1.10

After quenching and tempering treatment, GB 40CR alloy steel is a high-quality quenched and tempered alloy structural steel, which belongs to high-quality low-carbon, low-alloy chromium, molybdenum, nickel surface-hardened steel with good comprehensive mechanical properties and good low-temperature impact toughness.

What are the mechanical properties of 40Cr steel?

The typical mechanical properties of 40Cr steel include the hardness of steel plate and steel coil as hot rolled, the hardness after annealing, the hardness of different cooling media

Quenching hardness under quality, etc., the specific parameters are as follows:

Hot rolling hardness: ≦300

Annealing hardness: ≦180

Water quenching temperature: 800-880°C

Water quenching hardness: ≧47HRC

Oil quenching temperature: 800-890°C

Oil Quenching Hardness: ≧45HRC

What are the forms of 40Cr steel?

40Cr steel can be made into round bars, round bars, flat bars, plates, hexagonal bars, and cubes. The above forms can be processed into specific sizes according to your needs.

What is the hardness of 40Cr?

The hardness of 40Cr after quenching and tempering is in the range of 32-36HRC, which is about 301-340HB.

What is the regular size of 40Cr steel?

Steel round bars: diameter Ø 5mm – 3000mm

Steel plate: Thickness 5mm – 3000mm x

Width 100mm – 3500mm

Hex Rod: Hex 5mm – 105mm

What is the process flow of 40Cr steel?

40Cr steel is firstly made of hot-rolled special steel with oxygen converter to smelt killed steel. After refining, it is continuously cast. delivery. Delivery forms include straight hair curls, finished curls, and can also be delivered in cut boards.

What are the delivery states of 40Cr steel?

The delivery state of 40Cr steel can be delivered in the states of controlled rolling, annealing, quenching, quenching and tempering.

What is the delivery method of 40Cr steel?

According to the needs of users, the steel plate can be delivered by shot blasting surface pretreatment.

What are the characteristics of 40Cr steel?

GB 40Cr alloy steel is a high-quality quenched and tempered alloy structural steel, which belongs to high-quality low-carbon, low-alloy chromium, molybdenum, nickel case hardened steel. Oil quenched and tempered hardness 28-34 HRc. 40 GB cr steel annealed delivery characteristic of less than 250 hb. 40 cr and lower carbon content range, so GB 40Cr alloy steel has good weldability.

40Cr steel is a popular metalworking alloy with many different applications from agriculture to automotive. It has excellent resistance to corrosion and oxidation along with excellent mechanical properties, making it an excellent choice for many applications.

40Cr steel has good hardness, toughness and wear resistance. It also has a certain anti-corrosion ability. In addition, it is easy to process and has good solderability. These properties make 40Cr steel an ideal material for manufacturing gears, shafts, bearings and other mechanical parts.

40Cr steel has good hardness, toughness and wear resistance. It also has a certain anti-corrosion ability. In addition, it is easy to process and has good solderability. These properties make 40Cr steel an ideal material for manufacturing gears, shafts, bearings and other mechanical parts.

What are the disadvantages of 40Cr steel?

There are several disadvantages to using 40Cr steel. First, the high carbon content means the steel is very hard and difficult to machine. This can make it difficult to shape or shape the steel into the desired shape. Second, the high carbon content also makes steel more prone to rust and corrosion. Finally, the high carbon content means that this steel is less ductile than other steels, which means it is more likely to break or crumble under stress.

What are the best uses for 40Cr steel?

40Cr steel is a Cr alloy steel containing 0.4% carbon. This makes it one of the most versatile steels available, as it can be used in a variety of applications. Here are some of the best uses for 40Cr steel:

– Auto Parts: Due to its high strength and durability, 40Cr steel is commonly used in the manufacture of auto parts such as transmissions and drive shafts.

– Construction: 40Cr steel is also often used in construction as it is ideal for the manufacture of structural components that need to withstand heavy loads.

– Mechanical: This steel is often used in mechanical construction because its strength and wear resistance make it ideal for many moving parts.

-Tools: 40Cr steel is also a popular tool choice as it can withstand high levels of wear.

What is the difference between 40Cr steel and 45# steel?

First of all, the carbon content of 40Cr is not as high as that of 45# steel.

In terms of mechanical properties: there is basically no difference between them;

In terms of price: the price of 40Cr is about half higher than that of 45# steel. When your budget is sufficient, you can choose 40Cr steel without hesitation

Is there a substitute for 40Cr steel?

The equivalent steel grades that can replace 40Cr are 40MnB, 45MnB, 35SiMn, 42SiMn, 40MnVB, 42MnV, 40MnMoB, 40MnWB, etc.

How to care for 40Cr steel?

The best way to care for 40Cr steel is to keep it clean and dry. Avoid harsh chemicals or abrasives when cleaning steel. Instead, opt for a mild detergent and a soft cloth. If you must use a stronger cleaner, be sure to rinse the area thoroughly afterwards.