Specifies the requirements for the production and supply of cold-formed, electric resistance-welded, steel hollow sections used for structural purposes. It considers three strength grades, with or without impact properties, that are suitable for welding.
Table of contents
Header
About this publication
Preface
1 Scope
2 Normative references
3 Definitions and notations
4 Designation
5 Manufacturing process
5.1 Steel feed
5.2 Finished product
6 Chemical composition
6.1 General
6.2 Cast analysis
6.3 Product analysis
7 Manufacturing tolerances
7.1 General
7.2 Measurement of size and shape
7.2.1 General
7.2.2 External dimensions
7.2.3 Thickness
7.2.4 Out-of-roundness
7.2.5 Concavity and convexity
7.2.6 Squareness of sides
7.2.7 External corner profile
7.2.8 Twist
7.2.9 Straightness
7.2.10 Removal of the external weld seam upset
8 Freedom from defects
8.1 General
8.2 Weld seam
8.2.1 Position
8.2.2 Non-destructive examination
8.3 Removal of surface defects
8.4 Weld repair of surface defects
9 Testing
9.1 Selection of test samples
9.2 Position and orientation of test pieces
9.2.1 Tensile test and impact test
9.2.2 Cold flattening test
9.3 Preparation of test pieces for mechanical testing
9.3.1 General
9.3.2 Tensile test piece
9.3.2.1 Form of test piece
9.3.2.2 Circular hollow sections (CHS)
9.3.2.3 Rectangular hollow section (RHS)
9.3.3 Impact test piece
9.3.4 Ageing treatment
9.3.5 Cold flattening test
9.4 Mechanical testing
9.4.1 Tensile test
9.4.2 Impact test
9.4.2.1 General
9.4.2.2 Hollow sections with nominal thickness of 6 mm or greater
9.4.2.3 Hollow sections with nominal thickness less than 6 mm
9.4.3 Cold flattening test
10 Mechanical properties
10.1 Tensile test
10.2 Impact test
10.3 Cold flattening test
11 Identification, test and inspection certificates
11.1 Identification
11.1.1 Individual length markings
11.1.2 Bundle/pack markings
11.2 Test and inspection certificates
11.2.1 General
11.2.2 Transmission of test and inspection certificates by an intermediary
11.2.3 Qualifications on test and inspection certificates
11.2.4 Minimum requirements for test and inspection certificates
12 Sampling and testing to demonstrate product conformity
13 Rounding of numbers
13.1 General
13.2 Tensile properties
14 Manipulation
15 Section designations, nominal dimensions, cross-section properties and masses
