BS 4449:1997

Committees responsible
Foreword
Specification
1 Scope
2 References
3 Definitions
4 Sizes
5 Cross sectional area and mass
6 Length
7 Steelmaking process
8 Chemical composition
9 Bond classification of deformed bars
10 Routine inspection and testing
11 Mechanical properties
12 Fatigue properties of deformed bars
13 Retests
14 Verification of mechanical properties
15 Product identification
Annexes
A Information to be supplied by the purchaser
B Determination of the effective cross sectional area of
    deformed bars
C Recommended formulae for calculating projected rib area
D Bond classification of deformed bars (bond test)
E Inspection, testing and certification
F Method of test for fatigue properties of deformed bars
G Multiplying factors for tensile tests
Tables
1 Preferred nominal sizes
2 Cross sectional area and mass
3 Tolerance on mass
4 Chemical composition of steel grades: cast analysis
5 Maximum carbon equivalent values: cast analysis
6 Maximum deviations in chemical composition on product
    analysis
7 Tensile properties
E.1 Percentage total strain
E.2 Rebend test formers
E.3 Acceptability index k as a function of the number of
    test results n (for a reliable failure rate of 5%
    (pass = 0.95) at a probability of 90% (1 - a = 0.90)
F.1 Test stress ranges for nominal bar sizes
Figures
1 Example of rib pattern of grade 460A with four transverse
    rib series
2 Example of rib pattern of grade 460B with four transverse
    rib series
D.1 Typical mould for bond performance testing

Defines requirements for weldable steel bars for reinforcing concrete. Describes plain round steel bars, grade 250, together with deformed high yield steel bars in grade 400, the latter in two ductility categories, 460A and 460B.