20C8
20C8 Grade Introduction:
20C8 Carbon steel is an unalloyed low carbon grade. Components when carburized have a core strength range of 430-490N/mm² with the hard wear-resistant surface case. It is a popular case hardening steel grade for general engineering, readily machinable and weldable in its supply condition. 20C8 is low tensile steel suited for lightly stressed components.
20C8 Grade Application:
- Collets
- Cams
- Rollers
- Bushes
- Spindles
- Gears
20C8 Equivalent Grades:
|
IS(Current) |
IS(Obsolete) |
BS(Obsolete) |
BS(Current) |
DIN(Obsolete) |
DIN(Current) |
SAE(Current) |
| 20C8 |
C20 |
3D ,070M20 |
– |
– |
– |
1018, 1019,1021,1022 |
20C8 Chemical Composition:
| Element |
C |
Mn |
Si |
S |
P |
| Content (%) |
0.15 – 0.25 |
0.60 – 0.90 |
0.15 – 0.35 |
0.40 Max |
0.40 Max |
Mechanical Properties:
| TYPICAL MECHANICAL PROPERTIES |
TENSILE STRENGTH N/MM² |
18 |
IMPACT IZOD J |
IMPACT KCV J |
|
430 |
18 |
39 |
35 |
Physical Properties:
| Property |
Imperial |
Metric |
| Thermal Conductivity |
51.9 W/mK |
360 BTU in/hr.ft².°F |
Thermal Properties:
| Property |
Imperial |
Metric |
| Thermal Conductivity |
51.9 W/mK |
360 BTU in/hr.ft².°F |
Forging Properties:
Soak for 1 hour at 2150 F (1177 C) prior to forging. Do not work below 1850 F (1010 C). Post-work solution treatment is required prior to final hardening.