CK45 Lost Wax Investment Casting

Product Introduction

CK45 lost wax investment casting is a high-strength medium-carbon high-quality structural steel with good comprehensive mechanical properties. It has high strength and good machinability. It has low hardenability and is prone to cracks during water quenching. It should be used after normalizing and annealing. Mostly, when the mechanical performance requirements are high, quenching and tempering treatment is used. It is recommended that small parts use quenching and tempering treatment, and large parts can use normalizing treatment. Suitable for hydrogen welding and argon arc welding, but not suitable for gas welding. Welding parts should be preheated before welding and stress relief annealed after welding.

CK45 is equivalent to domestic No. 45 steel. A commonly used steel, also called 45# steel, usually appears in the form of plates, bars, pipes, etc. The following is the chemical composition of CK45, which is the same as 45# steel. CK 45 DIN 17 200

Reference corresponding steel number:

Chinese GB standard steel number 45; Japanese JIS standard steel number S45C/S48C; German DIN standard material steel number 1.0503; German DIN standard steel number C45; British BS standard steel number IC45/080A47; French AFNOR standard steel number CC45; French NF standard Steel number C45; Italian UNI standard steel number C45; Belgian NBN standard steel number C45-1; Swedish SS standard steel number 1650; Spanish standard steel number F.114; American AISI/SAE standard steel number 1045; International Organization for Standardization ISO standard steel No. C45E4.

The mechanical properties of CK45

Normalizing: 850

Quenching: 840

Tempering: 600

Tensile strength: not less than 600Mpa

Yield strength: not less than 355Mpa

Elongation: 16%

Shrinkage: 40%

Impact power: 39J

Steel delivery status hardness:

Hot rolled steel: ≤229HB

Annealed steel: ≤197HB

45 steel is also called s45c, and it can also be called oil steel. Some colleagues also call it 45 steel, which is wrong. It is a high-quality carbon structural steel, which is a medium-carbon steel with a carbon content of more than 0.4%. It has low hardness and is easy to cut and process. It is usually formed by hot rolling or cold rolling.

Many parts in non-standard equipment will use 45 steel. After quenching and tempering or normalizing treatment, better cutting performance can be obtained, and higher strength, toughness, and other comprehensive mechanical properties can be obtained. Therefore, according to different requirements, Working conditions and requirements for 45 steel parts generally use quenching and tempering plus surface quenching to improve the surface hardness of the parts. Carburizing can also be used to improve the surface wear resistance.

① The first part of the steel number indicates the carbon content and the alloy structural steel contained is the same as the carbon structural steel. The unit is one ten-thousandth of carbon. If the first number is 45, it means the average carbon content is 0.45%; alloy tools Steel is measured in units of one-thousandth of carbon. If the first number is 5, it means that the average carbon content is 0.5%.

② After the number indicating the carbon content, use the chemical symbol of the element to indicate the alloying elements contained. The content of alloying elements is expressed in percent. When the average content is less than 1.5%, only the element symbol is indicated, not the content. For example, 25Mn2V means an alloy structural steel with an average carbon content of 0.25%, a manganese content of about 2%, and a vanadium content of less than 1.5%. Another example is 9SiCr, which represents an alloy tool steel with an average carbon content of 0.9% and less than 1.5% silicon and chromium.

③ For alloy tool steel with a carbon content exceeding 1.0%, the carbon content is not indicated in the grade. For example, CrWMn steel refers to alloy tool steel with a carbon content greater than 1.0% and containing three alloying elements: chromium, tungsten, and manganese. However, there are exceptions. The carbon content of high-speed steel is less than 1.0%, and the carbon content is not indicated in the grade. For example, W18Cr4V steel has a carbon content of only 0.7% to 0.8%.

④ The expression method of special performance steel grades is basically the same as that of alloy tool steel. For example, 2Cr13 means stainless steel with an average carbon content of 0.2% and a chromium content of approximately 13%.

⑤ Some special-purpose steels use special expression methods, such as rolling bearing steel, whose grade is represented by G. The carbon content is not marked, and the average chromium content is expressed in thousandths. For example, GCr15 means rolling-bearing steel with a chromium content of 1.5%.

⑥ For high-grade high-quality steel, add an “A” at the end of the steel number, such as 38CrMoAIA.

Detection Systems

Copper Silica Sol Investment Casting