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IS 6003:2010 is the Indian Standard (BIS) for indented wire for prestressed concrete. This standard specifies the requirements for cold-drawn, indented steel wire used for prestressing concrete. It covers material composition, manufacturing process, dimensions, mechanical properties such as tensile strength and proof stress, and testing procedures to ensure the wire's suitability for high-stress applications.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! The indentations are critical for achieving a strong mechanical bond with the concrete, which is essential for effective stress transfer.
! Proper storage is crucial to prevent corrosion (rust), as it can lead to stress corrosion cracking and a significant reduction in the wire's high-strength properties and ductility.
! Always verify the manufacturer's test certificate against the requirements of Table 2 before accepting a consignment of wire.
Consolidated list per BIS. For the text of each amendment, refer to the BIS portal link above.
steelwireprestressed concreteprestressing steel
International Equivalents
Similar International Standards
ISO 6934-2:2014ISO (International Organization for Standardization)
HighCurrent
Steel for the prestressing of concrete — Part 2: Cold-drawn wire
Covers cold-drawn steel wire (plain, indented, or ribbed) for prestressing concrete.
EN 10138-2:2009CEN (European Committee for Standardization), Europe
HighCurrent
Prestressing steels - Part 2: Wire
Specifies requirements for cold-drawn, stress-relieved steel wire for prestressing.
BS 5896:2012BSI (British Standards Institution), UK
HighCurrent
High tensile steel wire and strand for the prestressing of concrete - Specification
Specifies requirements for high tensile steel wire, including indented types, for prestressing.
ASTM A1064 / A1064M - 18ASTM International, USA
MediumCurrent
Standard Specification for Carbon-Steel Wire and Welded Wire Reinforcement, Plain and Deformed, for Concrete
Covers deformed steel wire for concrete, but has a broader scope including welded reinforcement and different applications.
Key Differences
≠Ductility Measurement: IS 6003 specifies a minimum elongation of 4% over a 200 mm gauge length. In contrast, EN 10138-2 and ISO 6934-2 specify a minimum total elongation at maximum force (Agt) of 3.5%, which is a different parameter measured over the entire test length.
≠Stress Relaxation Limits: IS 6003 specifies a single maximum 1000-hour relaxation value (e.g., 5.0% at 70% of min. UTS). EN 10138-2 provides different classes, with Class 2 (normal relaxation) having a much stricter limit of 2.5%, and Class 1 (low relaxation) at 1.0%.
≠Tensile Strength Grades: While largely similar, there are slight variations. IS 6003 includes a 1725 MPa grade, whereas the common international equivalent grade in EN 10138-2 and ISO 6934-2 is 1770 MPa.
≠Proof Stress Ratio: IS 6003 requires the 0.2% proof stress to be a minimum of 85% of the actual tensile strength. EN 10138-2 is stricter, requiring the ratio of 0.1% proof stress to nominal tensile strength (Rp0.1/Rm) to be ≥ 0.90.
Key Similarities
≈Manufacturing Process: All standards mandate that the wire be produced from high-carbon steel, cold-drawn to the final diameter, and then subjected to a controlled stress-relieving heat treatment to achieve the desired mechanical properties.
≈Core Function and Type: The fundamental product is the same—a high-tensile wire with surface indentations specifically designed to improve the bond with concrete for prestressing applications.
≈Fundamental Mechanical Tests: All standards require a core set of mechanical tests, including tensile strength, proof stress (yield), and a bend test (or reverse bend test) to ensure a combination of strength, ductility, and material soundness.
≈Fatigue Requirements: Both IS 6003 and key international standards like ISO 6934-2 specify fatigue testing requirements, typically requiring the wire to withstand 2 million cycles under a stress range of 200 MPa without failure.