BS 6744:2023 – TC

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Tracked Changes. Stainless steel bars. Reinforcement of concrete. Requirements and test methods

Published By	Publication Date	Number of Pages
BSI	2023	108

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Categories: 77.140.20 - Stainless steels, BSI

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PDF Catalog

PDF Pages	PDF Title
1	30470728
69	A-30461536
73	Foreword
75	1 Scope 2 Normative references 3 Terms, definitions and symbols
76	Figure 1 — 0.2% proof test
79	Figure 2 — Typical stress‑strain curve (relation) for stainless reinforcing
80	Table 1 — Symbols
81	4 Designation 5 Standard diameters Table 2 — Standard diameters
82	6 Dimensions, mass and tolerances 6.1 Nominal cross‑sectional area and mass per metre run Table 3 — Nominal cross‑sectional area of reinforcing steel and nominal mass per metre run Table 4 — Tolerances on mass per metre run
83	6.2 Length 7 Steelmaking process 8 Chemical composition 8.1 Cast analysis 8.2 Product analysis 9 Surface quality 10 Surface geometry 10.1 General Table 5 — Chemical composition (cast analysis) % by mass of typical, commercially available BS EN 10088 stainless reinforcing steel designationsA)
84	10.2 Relative rib area Table 6 — Minimum relative rib area, fRmin
85	Table 7 — Ranges for the rib parameters 10.3 Geometry of rib 11 Conditions of supply 12 Mechanical and physical properties 12.1 Selection of test samples for conformity testing
86	12.2 Test reports 12.3 Test certificate 12.4 Retests 12.5 Tensile properties
87	Table 8 — Strength and ductility properties 12.6 Bendability
88	Table 9 — Bend test formers 12.7 Bonding strength (surface geometry) 12.8 Fatigue characteristics 12.9 Strength at elevated temperature (tensile strength) 12.10 Chemical composition and durability 12.11 Weldability
89	12.12 Additional test requirements 13 Product identification 13.1 Product marking 13.2 Product labelling
90	Annex A (normative) Test method for determining the corrosion resistance of stainless reinforcing steel in chloride contaminated concrete
91	Figure A.1 — Geometry of the specimens
92	Annex B (informative) Guidance on durability
94	Table B.1 — Prescriptive guidance advice
96	Figure B.1 — Example predictive model indicating where carbon steel reinforcement can be replaced by stainless steel reinforcement for a given chloride surface content, design life and reinforcement depth
97	Annex C (informative) Guidance on magnetic properties
98	Annex D (informative) Guidance on coefficients of thermal expansion Table D.1 — Comparative thermal coefficient of expansion data Annex E (informative) Design guidance: constitutive relationship
99	Figure E.1 — Idealized design curve from BS EN 1992‑1‑1:2004+A1:2014 Table E.1 — Young’s modulus for stainless reinforcing steel
100	Figure E.2 — The constitutive law of stainless reinforcing steel
101	Figure E.3 — Example of design model for stainless reinforcing steel Annex F (informative) Guidance on welding
102	Annex G (normative) Performance at elevated temperatures Annex H (informative) Quality assurance
103	Table H.1 — 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 – α = 0.90)
105	Annex I (informative) High-strength bars
106	Bibliography