A billet is a length of metal that has a round or square cross-section, with an area less than 36 in2 (230 cm2). Billets are created directly via continuous casting or extrusion or indirectly via hot rolling an ingot or bloom. Billets are further processed via profile rolling and drawing. Final products include bar stock and wire.
Centrifugal casting is also used to produce short circular tubes as billets, usually to achieve a precise metallurgical structure. They are commonly used as cylinder sleeves where the inner and outer diameters are ground and machined to length. Because their size is not modified significantly, they are not always classified as semi-finished casting products.
In copper production, a billet is a 30 feet (9.1 m) long, about 8 inches (200 mm) diameter, of pure copper.
TYPICAL CHEMICAL COMPOSITION:
|
%C |
%Si |
%Mn |
%P |
%S |
N(PPM) |
CE* |
|
0.10-0.38 |
0.15-0.30 |
0.60-1.40 |
0.035 MAX |
0.035 MAX |
120 |
0.30-0.50 |
Note: Carbon equivalent Value =C +Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15
SIZE RANGE:
|
CROSS SECTION |
WEIGHT/METER |
LENGTH |
|
130MMX130MM |
132 KG/METER |
6-12 METER (+50/-50MM) |
|
150MMX150MM |
175 KG/METER |
6-12 METER (+50/-50MM) |
|
160MMX160MM |
196 KG/METER |
6-12 METER (+50/-50MM) |
We have the capability to produce and supply in the size range 100-200 mm though the common standardised sizes are only mentioned above.
PHYSICAL PARAMETERS:
|
Sl No |
Parameters |
Value |
|
1. |
Dimension tolerance |
± 2 % |
|
2. |
Rhombodity |
3% Max |
|
3. |
Diagonal difference |
≤ 10mm |
|
4. |
Corner radius |
4 mm Max |
|
5. |
Straightness |
Camber 5mm/meter |
|
6. |
Angular Twist |
Not more than 1 degree per meter and not more than 6 Degree over 12 meter length. |
|
7. |
Cutting |
Both ends will be Flame Cut |
|
8. |
Identification |
At the end of each billet cast number and size will be Stamped or hand written |
|
9. |
Surface |
The defects like longitudinal cracks, transverse cracks, scab and thick scale, slag patches, surface blowholes etc. will be within acceptable range. |