Although some of the billets produced at Qatar Steel are solid directly to customers, most are processed into bars in one of our rolling mills. We supply high quality steel billets of various cross-sections and sizes, which enable us to meet the customer requirements and industry specifications, including ASTM, JIS and CNS.
Permissible variations from specified ranges and makings are tabulated.
1. Chemical Properties of Billets
As per International Standard/other chemical composition at options.
2. Size Range
Cross Section
130 mm X 130 mm
150 mm X 150 mm
Weight 132 kg/meter for 130 mm X 130 mm 175 kg/meter for 150 mm X 150 mm
Length
3.5 meter to 12 meter
Nominal Corner Radius 6 mm max. for 130 mm X 130 mm 8 mm max. for 150 mm X 150 mm
3. Allowable Variation on Size
Face Length :
± 3 mm
Difference in Diagonals :
< 8 mm
Cut Length :
± 50 mm
Bending :
Not more than 5 mm in 1 meter Not more than 30 mm in 6 meter
Not more than 40 mm in 12 meter
Rhombodity :
Any two adjacent faces to be within 2 degree of a right angle.
Angular Twist :
Not more than 1 degree per meter and not more than 6 degree over 12 meter length.
(No. twist will be preferable)
Straightness :
Camber 5mm/meter
Billet Ends :
Billet ends to be cut at right angles with surface roughness within 2 ~ 4 mm
Surface Quality :
Free from deep crack (not longer than 20 mm and not deeper than 0.5 mm)
Free from surface pin hole (diameter not more than 4 mm and not deeper than 3 mm)
Free from oscillation mark (not deeper than 0.6 mm)
Short Length :
Not more than 5% of the total order weight
4. Identification
Marking :
At the end of billet cast number is to be stamped/hand written.
