Steel Tubes for Scaffolding Tubes Confirming to BS 1139 / IS1161
Dimensions and Tolerances for Welded Steel Tubes
Parameter
Dimensions and Mass
Tolerances
Outside Diameter
48.3mm
± 0.5mm
Thickness
3.2mm
Welded
+ 0.3mm
  - 0.13mm
Length
if specified exact
± 6.0mm
otherwise
Random length of4 to 7 Mtr.
Straightness
1/600 of length
 
Mechanical Properties of the tubes:
Chemical composition (ladle analysis)

Tensile strengths 340 N/mm² to 460 N/mm²

Yield Strength 210 M/mm² min

Elongation 22% min
C 0.20 % max
Si 0.30 % max
P 0.060 % max
S 0.060 % max