Baja S45C adalah baja medium karbon yang mempunyai kandungan karbon sekitar 0,43 - 0,50 dengan daya renggang menengah yang dipasok dalam kondisi gulungan panas hitam atau kondisi normal. Baja ini memiliki kekuatan untuk direnggakan 570 – 700 MPa dan kekerasan Brinell di antara 170 dan 210.
Baja S45C sangat banyak digunakan untuk bahan komponen-komponen mesin, baik komponen transmisi, atau komponen konstruksi yang lain pada konstruksi permesinan atau mesin perkakas.
| C |
Si |
Mn |
P |
S |
|
|
|
|
| 0.42-0.48 |
0.15-0.35 |
0.6-0.9 |
0.030 Max |
0.035 Max |
|
|
|
|
S45C Mechanical Properties
| Properties |
Standard |
Quenching, Tempering |
| Tensile Strength (MPa) |
569 |
686 |
| Yield Strength (MPa) |
343 |
490 |
| Young’s Modulus (GPa) |
190-210 |
|
| Brinell Hardness (HB) |
160-220 |
(Annealed) |
| Density (kg/m3) |
7700-8030 |
|
| Poisson's ratio |
0.27-0.30 |
|
S45C Heat Treatment
The following temperature ranges are applicable for the respective heat treatment operations.
| Properties |
|
S45C |
| Full Annealing |
|
800 - 850°C |
| Normalising |
|
840 – 880°C |
| Hardening |
|
820 – 860°C |
| Tempering |
|
550 – 660°C |
| Quenching medium |
|
Water or Oil |
| Melting point |
|
1520°C |
Gear, roda gigi, base plate, sprocket dll
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