Medium Carbon Steels
Home – Medium Carbon Steels
Our Stocks are indicated in the tables below. Standard sizes not in our stocks can be requested
EN-8
medium carbon steel
Approximate Other Equivalents
IS : C 40 / C 45 VISL : M – E 40/M-E 45 AISI : 1040/1045
DIN : C-40/C 4
APPLICATION
Heat Treatment Bolts, Engine Shafts, Connecting Rods, Dynamo & Motor Shafts, small ARM parts not subject to High Stress & Severe wear.
Our Colour Code: WHITE
LIST OF STANDARD SIZES
- Round: Ø 20mm – Ø 300mm
- Bright Round: Q5 – Q55mm
- Flats: 6×25 – 200×500
- Square: 12mm – 300mm
- Plates: 6mm Thick to 200mm Thick
OUR STOCKS
- Round: Ø 6mm – Ø 500mm
- Flats: 6x25mm – 200x300mm
- Square: 16mm – 200mm
- Hexagon: AF/10 to A/F 41
| QUALITY | C | Si | Mn |
|---|---|---|---|
| EN – 8 | 0.35 | 0.25 | 0.8 |
| EN – 8 | 0.45 | MAX | 1.2 |
| C – 45 | 0.4 | 0.1 | 0.6 |
| C – 45 | 0.5 | 0.35 | 0.9 |
SPECIFIC HEAT TREATMENT
| QUALITY | EN – 8/C -45 / CK – 45 |
|---|---|
| Forging Temperature | 1100 to 850ºC |
| Annealing Temperature | 840 to 880ºC (Soft Annealing) |
| Annealed Hardness BHN Max | 185 to 200ºC BHN |
| Hardening Temperature | 830 to 860ºC (Oil), 820 to 850ºC (Water) |
| Quenching Media | Oil/Water |
| Obtainable Hardness R.C. | —- |
| Working Hardness HRC. | —- |
| Tempering Temperature | 670 to 530ºC |
