Billet

Billet

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 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 standardized 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.