1.0503 CK45

 

This grade is water-hardening steel suitable for small parts of moderate strength. This grade has a slightly greater hardenability and strength. It has moderate strength and hardness in the as-rolled condition, and can be strengthened and hardened by cold work. Machinability is only fair, as is weldability. Precautions must be taken when welding to avoid cracking from cooling too rapidly

 

Standard Designation Grade, Class, Type, Symbol or Name Steel

Number

UNS Number Product

Form/Heat

Treatment

Thickness Yield Strength, min Tensile Strength, min Elongation, min, % Other
t, mm t, in. N/mm2 or MPa ksi N/mm2 or MPa ksi
EN 10250-2:1999 C45 1.0503 N or NT ≤ 100 305 580 16
100 < t ≤ 250 275 560 16 18 J at 23°C
250 < t ≤ 500 240 540 16 15 J at 23°C
500 < t ≤ 1000 230 530 15 12 J at 23°C
C45E 1.1191 N or NT ≤ 100 305 580 16
100 < t ≤ 250 275 560 16 18 J at 23°C
250 < t ≤ 500 240 540 16 15 J at 23°C
500 < t ≤ 1000 230 530 15 12 J at 23°C

 

Composition:

 

%C %Si %Mn %P %S %Cr %Mo %Ni  % Others
0,42-0,50 ≤0,40 0,50-0,80 0,045 0,045 ≤0,40 0,10 ≤0,40 Cr+Mo+Ni ≤ 0,63

 

Hot working:

Forging temperature range: 1100-850℃
 
Note: Heat to 1200 ℃. Do not forge below 850.

 
Heat treatment:

Soft annealing ℃ HB 30-soft annealed Normalizing ℃ Hardening temperature for quenching in Water ℃ Hardening temperature for quenching in Oil ℃ Tempering temperature ℃
650-700 207 840-870 820-850 830-860 540-680

 

Main application:

Arbors, spindles, axles, bolts
 
Shape of product:

Round, flat, step shape, ring, disc, shaft, other shape depend on customer needs