1.1186 C40E

 

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 N/mm2 or MPa N/mm2 or MPa
EN 10250-2:1999 C35E 1.1181 — QT ≤ 70 320 550 20 35 J at 23°C
70 < t ≤ 160 290 490 22 31 J at 23°C
160 < t ≤ 330 270 470 21 25 J at 23°C

 

Composition:

 

%C %Si %Mn %P %S Cr Mo Ni other
0,37-0,44 ≤0,40 0,50-0,80 0,035 0,035 ≤0,40 ≤0,10 ≤0,40 Cr+Mo+Ni ≤ 0,63

 

Hot working:

Forging temperature range: 1240-850℃
 

Note: Heat to 1240 ℃. 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 ℃
650-700 197 850-880 830-860 840-870 540-680

 

Main application:

Wear-resistant structural components
 

Shape of product:

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