Steel square billets

Material
Steel grades with the chemical composition and the mechanical characteristics according to the following standards  STAS 500/2-80, STAS 880-88, STAS 1350-89, STAS 8184-87, STAS 8185-88, STAS 10382-88, STAS 11500/2-89.
When agreed, there can also be rolled square billets of other steel grades.

Dimensions and limit tolerances
According to STAS 436/90
Section [mm x mm] Weigh [Kg/m] Section [mm x mm] Weigh [Kg/m]
140 x 140 150,9 100 x 100 76,9
120 x 120 129,6 90 x 90 62,6
130 x 130 110,9 80 x 80 49,3
110 x 110 92,8 70 x 70 37,9
Side [mm] 130 - 140 110 - 120 90 - 100 80 70
Limit tolerances [mm] ± 4 ± 3,3 ± 2,7 ± 2,7 ± 2,1

Shape deviations and surface condition
Max.diference between the  diagonals 0,6 of the side tolerance
Burrs due to cutting max. 8 mm
Local bends max. 6 mm/m
Permitted cambers max. 0,5 mm
Max.permissible depth of the flaws for a <= 80 mm;  a > 80 mm (0,5 x a/100) + 2
Max. cleaning depth for  a <= 80 mm;  a > 80 mm 1/2  of tolerance

Delivery lengths
Length types Delivery length [m] Permissible deviations [mm]
Manufacture lengths 2 - 15

-
Fixed lengths 4 - 15 + 100/- 0

Delivery state, delivery
Delivery state Delivery
Rough rolled, straightened, without heat treatment, with unpolished and not flame - cleaned surface As individual bars