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Material Notes:
CLC 1.2738 is a 300HB (30HRC) pre-hardened grade specially designed for plastic mold industry. Chromium, Molybdenum, Nickel carbon and manganese additions are optimized to have a fully martensite-bainite microstructure after quenching. The high nickel content (1%) is specially adapted to ensure a perfect homogeneity of structure and hardness through thickness even for very thick blocks (up to 700mm/28"). The steel is melted in electrical furnace and refined with VOD or DH device The cleanliness of the steel is guaranteed as well as the soundness. This makes the steel particularly well adapted for mold even when polishing or chemical etching are required for surface finish quality.
| Mechanical Properties |
|
Metric |
English |
Comments |
| Hardness, Rockwell C |
300 |
300 |
Typical, in Transverse Direction |
| Tensile Strength, Ultimate |
993 MPa |
144000 psi |
Typical, Transverse Direction |
| Tensile Strength, Yield |
826 MPa |
120000 psi |
Typical, Transverse Direction |
|
@Strain 0.200 % |
@Strain 0.200 % |
|
| Elongation at Break |
17 % |
17 % |
Typical, EL 5.65 Transverse Direction |
| Modulus of Elasticity |
205 GPa |
29700 ksi |
Typical, in Transverse Direction |
| Charpy Impact |
22.0 J |
16.2 ft-lb |
Typical (Transverse) |
| Thermal Properties |
|
Metric |
English |
Comments |
| CTE, linear |
12.7 µm/m-°C |
7.06 µin/in-°F |
|
|
@Temperature 20.0 - 200 °C |
@Temperature 68.0 - 392 °F |
|
| Thermal Conductivity |
29.0 W/m-K |
201 BTU-in/hr-ft²-°F |
|
|
@Temperature 20.0 °C |
@Temperature 68.0°F |
|
| Component Elements Properties |
|
Metric |
English |
Comments |
| Carbon, C |
0.40 % |
0.40 % |
|
| Chromium, Cr |
1.9 % |
1.9 % |
As remainder |
| Iron, Fe |
94.683 - 94.7 % |
94.683 - 94.7 % |
|
| Manganese, Mn |
1.5 % |
1.5 % |
|
| Molybdenum, Mo |
0.20 % |
0.20 % |
|
| Nickel, Ni |
0.0 % |
0.0 % |
|
| Phosphorous, P |
<= 0.012 % |
<= 0.012 % |
|
| Silicon, Si |
0.30 % |
0.30 % |
|
| Sulfur, S |
<= 0.0050 % |
<= 0.0050 % |
|
