Rectangular shape
Hollow sections
Heat-treatable steels
Mathematical calculations
Ordering
Hot-working
Mass
Square shape
Length
Form tolerances
Diameter
Circular shape
Dimensions
Dimensional tolerances
Unalloyed steels
Elliptical shape
Steels
Weight tolerances
Thickness
Welding
Area
Metal sections
Structural steels
Link: BS EN 10210-2:2019 – TC Tracked Changes. Hot finished steel structural hollow sections Tolerances, dimensions and sectional properties
Source: BSI Standards