The material of 42CrMo4 for gear forgings must first meet the requirements of working conditions.

42Crmo4 shaft hot rolled

DIN 42CrMo4 for gear equivalent material

♦JAPAN♦ : JIS SCM440 alloy steel

♦American♦ : AISI/ASTM 4140 steel alloy

♦CHINA♦ :  GB 42CrMo steel

♦BRITISH♦ : BS 708M40

The material of 42CrMo4 for gear forgings must first meet the requirements of working conditions.

The requirements of working conditions are the factors that should be considered first when selecting gear forging materials. Alloy steel is often used to make gear forgings with high speed, heavy load and working under impact loads, such as gears used in aircraft. High reliability is required, so alloy steel with high mechanical properties must be selected. If the gear size is required to be as small as possible, surface-hardened high-strength alloy steel should be used. The gear transmission in mining machinery generally has large power, low working speed, and extremely high dust content in the surrounding environment. Therefore, cast steel or cast iron are often selected. The power of household and office machinery is very small, but it requires stable transmission, low noise or no noise, and can work normally with little or no lubrication. Therefore, engineering plastics are often used as gear materials.

The choice of 42CrMo4 for gear forging materials should consider the gear size

Blank forming method and heat treatment process. Large-sized gears generally use cast blanks, and cast steel or cast iron can be used as gear materials. Gears with high requirements for medium or below medium size often use forged blanks, and can be made of forged steel. When the size is small and the requirements are not high, round steel can be used as the blank.

Function of 42CrMo4 for gear

42CrMo for gear steel is a high quality Quenched and Tempered Alloy Structural steel . It belong to the high quality medium carbon alloy steel, Oil Quenched & Tempered Hardenss is 28-34 HRC . 42CrMo Annealing delivery hardenss less than 250HB . This materials was the best choose for produce bolt and screw .

Ms Sharon Wan

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