C45 steel material equivalent

C45 steel is a medium-carbon steel, known for its good machinability, strength, and wear resistance. It is commonly used in applications like gears, shafts, and other mechanical components that require moderate strength.  

The equivalents of C45 steel in various standards include:  
- In the European standard (EN 10083), it is equivalent to 1.0503.  
- In the AISI (American) system, it is roughly equivalent to 1045 steel.  
- In the DIN standard, it is also known as C45E or C45 depending on specific grades, and sometimes also as 1030 in older specifications.  
- In the JIS (Japanese) system, it is equivalent to S45C.  

These materials have similar chemical compositions, making them interchangeable in applications that require moderate tensile strength and good machinability, though specific properties like carbon content and heat treatment conditions may vary slightly depending on the standard.

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