ISO 6934-1-1991 PDF

Full title and description

Steel for the prestressing of concrete — Part 1: General requirements. This part of ISO 6934 specifies the general requirements that apply to steels used for prestressing concrete (definitions, general delivery conditions, references to product-specific parts and to test methods and marking/identification requirements).

Abstract

ISO 6934-1:1991 defines the overarching requirements and references for the ISO 6934 series on prestressing steels. It establishes the general conditions of manufacture, delivery, testing and documentation that apply to the more product-specific parts of the series (wires, strand, bars). The part is concise (short technical standard) and intended to be read alongside the specific product parts (e.g., cold‑drawn wire, quenched & tempered wire, strand, hot‑rolled bars).

General information

• Status: Published (this edition reviewed and confirmed in 2021).
• Publication date: 11 July 1991.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 77.140.15 (Steels for reinforcement of concrete); 91.080.40 (Concrete structures).
• Edition / version: Edition 1 (1991).
• Number of pages: 7.

Scope

ISO 6934-1:1991 sets out the general requirements and delivery conditions that apply to steels intended for prestressing of concrete. It is not a product specification by itself but provides the common rules (terminology, general mechanical/physical requirements references, testing and marking principles) to be used with the product-specific parts of ISO 6934. The standard is intended to ensure uniformity between the parts of the series and to reference appropriate test methods and normative documents.

Key topics and requirements

• Definitions and terminology applicable across the ISO 6934 series.
• General delivery conditions (manufacturer’s documentation, marking and traceability).
• Reference to normative test methods and mechanical testing requirements (tensile tests, fatigue, bend/rebend where applicable).
• General requirements for stress‑relief and heat treatment as applicable across product types.
• Instructions to apply product‑specific parameters given in the other parts of ISO 6934 (wire, strand, bars).

Typical use and users

Used by material suppliers (steel mills, wire producers, strand manufacturers), procurement teams, structural and materials engineers, testing laboratories and conformity assessment bodies involved in specifying, producing, testing and accepting prestressing steels for concrete structures (bridges, buildings, tanks, precast elements). It is referenced in procurement specifications and technical contracts to ensure consistent quality and test reporting.

Related standards

ISO 6934 is a multi‑part series. Relevant related parts include ISO 6934-2 (cold‑drawn wire — original 1991 edition, revised by ISO 6934-2:2024), ISO 6934-3 (quenched and tempered wire — 1991 edition), ISO 6934-4 (strand — originally 1991, later revised), and ISO 6934-5 (hot‑rolled bars — originally 1991, revised in 2024). Users should consult the appropriate product part for the detailed product requirements and the latest edition of each part. The series is maintained by ISO/TC 17/SC 16.

Keywords

prestressing steel; prestressing wire; prestressing strand; prestressing bars; high‑tensile steel; stress relieving; ISO 6934; reinforcement; concrete structures; mechanical testing; traceability.

FAQ

Q: What is this standard?

A: ISO 6934-1:1991 is the general‑requirements part of the ISO 6934 series, defining common delivery, testing, marking and documentation rules for steels used to prestress concrete.

Q: What does it cover?

A: It covers definitions, general delivery conditions, references to test methods and the general principles (traceability, marking, documentation and heat‑treatment/stress‑relief guidance) that apply across the product‑specific parts of ISO 6934. For product details the applicable part (wire, strand, bars) must be consulted.

Q: Who typically uses it?

A: Steel producers, strand and wire manufacturers, structural engineers, testing laboratories, procurement/specification writers and conformity assessors working with prestressed concrete components.

Q: Is it current or superseded?

A: ISO 6934-1:1991 was reviewed and confirmed in 2021 and remains the current edition of Part 1. Note that some product parts of the series have been revised more recently (for example, parts 2 and 5 have updated editions published in 2024 and part 4 has a later revision); always check the latest edition of each part when specifying requirements.

Q: Is it part of a series?

A: Yes — ISO 6934 is a multi‑part series covering different product forms of prestressing steel (Part 1 general requirements; Part 2 cold‑drawn wire; Part 3 quenched & tempered wire; Part 4 strand; Part 5 hot‑rolled bars, etc.). Consult the relevant part for product‑specific technical parameters.

Q: What are the key keywords?

A: Prestressing steel, high‑tensile wire, strand, hot‑rolled bars, stress relieving, mechanical testing, traceability, ISO 6934.