BS 2898:1970

Co-operating organizations
Foreword
Specification
1 General requirements
1.1 Scope
1.2 Definitions
1.3 Freedom from defects
1.4 Dimensions and tolerances
1.5 Selection of test samples
1.6 Mechanical tests
1.7 Electrical resistivity test
1.8 Retests
1.9 Certificate of compliance
1.10 Inspection
1.11 Independent test
1.12 Facilities for testing
2 Specific requirements
      Material E1E
      Material E91E
Appendices
A Preferred sizes
B Standard values (for information only)
Tables
1 Tolerances on diameter, width and thickness of
      bars and regular sections
2 Tolerances on open ends of channels and I beams
3 Tolerances on angle for extruded sections
4 Normal radii for corners
5 Tolerances on wall thickness of extruded round
      tube
6 Tolerances on outside and inside diameter of
      extruded round tube
7 Tolerances on width, width across flats and
      thickness of hollow sections
8 Cutting to length tolerances for bars, extruded
      round tube and sections
9 Straightness tolerances for extruded bars, regular
      sections and extruded round tube
10 Twist tolerances for extruded solid and hollow
      sections

Requirements for round and square bar not less than 10 mm diameter or across flats; rectangular bar not less than 2.5 mm minor dimension and extruded round tubes and sections for electrical conductors in aluminium in two conditions and aluminium alloy in one condition. Tolerances on dimensions and corner radius, chemical composition, mechanical properties and electrical resistivity. Preferred sizes for rectangular bar, extruded tube and round bar are given.