DIN Ck45 Non-alloy special steel Tube

Grade Application:

Suitable for manufacturing various strong cutting tools with wear-resistant, resistant to impact. Advanced punching die, screw die, the toughness and complicated shape of the punch, etc. Roll cutting tool industry: scraper, serrated knife, iron knives, drill bits, etc.

Forging industry: forging die.

Screw industry: heading forming mold, such as teeth, punch.

Equivalent grades:

Addition to other grades:

MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS, M2, M35, M42, DIN1.2714, P20, P20+S, P20+Ni,  SCM420, ASTMSA-36, ASTMSA-105, SAE1018, SAE4140, SAE8620, 16MNCR5, 20MNCR5, C20, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE52100, S40C, S355J2G3.

Chemical composition:

The following table shows the chemical composition of CK45 steel:

Mechanical Properties:

Hardness:

Hardness, Rockwell C (Water quenched on 820-870°C, 5 minutes): 201~269HB

Heat treatment:

Heat Treatment of AISI 1045 (CK45) followed by furnace cooling at 50ºF (28ºC) per hour, to 1200ºF (650ºC) soaking and air cooling. Hardening of this grade is carried out from an austenitizing temperature of 1475-1550ºF (800-845ºC) and oil or water quenching.

 Finishing rolling process: 

Finishing rolling is a process to obtain higher precision and better surface quality by rolling the heat-treated seamless steel pipe multiple times. The specific steps include: heat treatment - pickling - cooling - finishing rolling - sizing - cutting - length - inspection - packaging. Finishing rolling can improve the precision, surface quality and mechanical properties of steel pipe.

Cold drawing process: 

Cold drawing is a process of drawing the heat-treated seamless steel pipe one by one in a cold state to obtain high precision, high surface quality and high mechanical properties. The specific steps include: heat treatment - pickling - cooling - cold drawing - deoxygenation - wet pickling - cold water washing - leveling - straightening - pickling - cold water washing - oxide skin - cold drawing - sizing - straightening - pickling - cold water washing - deoxygenation - polishing - inspection - packaging. Cold drawing can significantly improve the dimensional accuracy, surface quality and mechanical properties of steel pipes.

Hot rolling production process: 

Hot rolling is the process of heating the blank to a certain temperature, and then forming it into seamless steel pipe through multiple rolls. The specific steps include: heating - rolling - roll probe - sizing - cooling - trimming - rod breaking - inspection - packaging. Hot rolling can produce seamless steel pipes with large diameters and wall thickness, but the accuracy and surface quality are not as good as fine rolling and cold drawing.

These three processes have different applications in the production of seamless precision steel pipes, and the specific choice depends on the required dimensional accuracy, surface quality and mechanical properties.