BS 7191:1989

Foreword
Committees responsible
Specification
Section one. General
1. Scope
2. Definitions
3. General
4. Information to be supplied by the purchaser
5. Steelmaking and manufacturing process
6. Supply condition
7. Chemical composition and mechanical properties
8. Weldability data for modified grades
9. Quality of finished steel
10. Identification of cast
11. Marking
12. Test certificates
13. Delivery
14. Mass of steel
Section two. Specific requirements for dimensional and
shape tolerances
15. Tolerances for plates
16. Tolerances for sections and seamless tubulars
Section three. Specific requirements for testing
17. Selection and identification of test samples for
    tensile and impact tests
18. Number of tensile tests
19. Direction and position of tensile test samples
20. Tensile test pieces
21. Tensile test
22. Number of impact tests
23. Position of impact test samples
24. Impact test pieces
25. Impact tests
26. Through-thickness testing for Z grades
27. Retests
28. Wide plate and crack opening displacement (COD) data
    for modified grade parent plate
Section four. Specific requirements for the chemical
composition and mechanical properties of weldable
structural steel plates
29. General
Section five. Specific requirements for the chemical
composition and mechanical properties of weldable
structural steel sections
30. General
Section six. Specific requirements for the chemical
composition and mechanical properties of weldable
structural steel seamless tubulars
31. General
Appendices
A. Comparison between grades in this standard and
    BS 4360
B. Options
C. Positions of test samples for tensile test
D. Position of test piece to be taken from tensile
    test sample when two rolled surfaces cannot be
    retained
E. Positions of test samples for impact tests
F. Weldability testing for modified grades and
    mechanical testing of butt welds
G. Bead-on plate weldability test for modified grades
Tables
1. Maximum product CEV for plates, sections and
    seamless tubulars
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3. } Tables deleted
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5. }
6. Maximum number of ripples/corrugations in plate
    with thickness >/= 12 mm
7. Maximum number of ripples/corrugations in plate
    with thickness >/= 10 mm < 12 mm
8. Chemical composition for plates
9. Mechanical properties for plates
10. Chemical composition for sections
11. Mechanical properties for sections
12. Chemical composition for seamless tubulars
13. Mechanical properties for seamless tubulars
14. Plates: comparison between grades in this standard
    and BS 4360
15. Sections: comparison between grades in this standard
    and BS 4360
16. Seamless tubulars: comparison between grades in this
    standard and BS 4360
17. }
18. } Tables deleted
19. }
20. }
21. Weldability test requirements for butt welds
22. Mechanical test requirements for each butt weld
23. Bead-on plate arc energy and preheat conditions
Figures
1. Plates: marking, die stamping and colour coding
2. Rolled sections: marking, die stamping and colour
    coding
3. Seamless tubulars: marking, die stamping and colour
    coding
4. Figure deleted
5. Location of impact test pieces
6. Through-thickness tensile test piece locations
7. Through-thickness tensile test piece locations
    within plate with thickness > 40 mm
8. Positions of test samples for tensile test
9. Position of test piece to be taken from tensile
    test sample when two rolled surfaces cannot be
    retained
10. Positions of test samples for impact tests
11. Location of Charpy V-notch impact test pieces for
    plate butt weld
12. Vickers hardness testing for plate butt weld
13. The HAZ regions in a single-bevel multi-pass weld
14. The HAZ regions in a single-bevel multi-pass weld
    with specific zones highlighted
15. COD specimen sectioning details
16. Plan view of polished section halves showing method
    to calculate GCHAZ percentage
17. Detail of test plate and location of hardness
    indentation for bead-on-plate hardenability test

Plates, sections and seamless tubulars with minimum yield strengths up to 450 N/mm² and impact properties down to -40 °C.