ASTM A706/A706M-24 PDF

Full title and description

ASTM A706/A706M-24 — Standard Specification for Deformed and Plain Low-Alloy Steel Bars for Concrete Reinforcement. This specification establishes chemical, mechanical, dimensional, testing and marking requirements for deformed and plain low‑alloy steel bars supplied in cut lengths or coils for use as reinforcement in concrete where enhanced weldability and controlled tensile properties are required.

Abstract

The A706/A706M-24 specification covers deformed and plain low‑alloy steel reinforcing bars supplied in cut lengths or coils. It sets limits on chemical composition and mechanical properties to improve weldability and to provide controlled tensile properties, prescribes required tests (tension, bend, dimensional), defines bar sizes and deformation requirements, and is published in both inch‑pound (A706) and SI (A706M) units.

General information

• Status: Current (latest approved edition, 2024).
• Publication date: May 15, 2024 (A706/A706M‑24).
• Publisher: ASTM International.
• ICS / categories: 77.140.15 — Steels for reinforcement of concrete.
• Edition / version: A706/A706M‑24 (2024 edition).
• Number of pages: 7–9 pages (format-dependent; typical published PDF lists 9 pages).

Scope

The standard applies to deformed and plain low‑alloy steel bars in cut lengths or coils intended for concrete reinforcement where specific mechanical property limits and chemical composition restrictions are required — for compatibility with controlled tensile applications and to enhance weldability. It defines grades by minimum yield strength, permissible sizes for plain bars, testing and inspection procedures at the place of manufacture, and provides both inch‑pound (A706) and SI (A706M) units.

Key topics and requirements

• Grade designations and minimum yield strengths (commonly Grade 60 [420 MPa], Grade 80 [550 MPa], and Grade 100 [690 MPa] in recent editions).
• Limits on chemical composition and carbon equivalent to improve weldability and predictable performance in welded and prefabricated applications.
• Mechanical property limits: minimum and maximum yield, minimum tensile, and elongation/ductility requirements by bar size.
• Mandatory manufacturer testing: tension tests, bend tests, and dimensional/deformation measurements for each bar size rolled from a heat; retesting provisions for nonconformance.
• Requirements for marking, deformations (rib spacing/height/gap) and nominal bar dimensions/weights.
• Applicability in both inch‑pound and SI units (A706 and A706M) with the warning that unit systems are not exact equivalents.
• Recommendations and references for welding practice (references to AWS D1.4/D1.4M for welding procedures).

Typical use and users

Spec writers, structural and civil engineers, rebar manufacturers and mills, reinforcing‑steel fabricators, construction contractors, quality control and testing laboratories, welding engineers, and procurement teams use this standard to specify, produce, inspect, and accept low‑alloy reinforcing bars where controlled tensile properties and weldability are required (for example, seismic detailing, precast and welded reinforcement assemblies).

Related standards

Commonly referenced related standards include ASTM A615/A615M (carbon steel bars), ASTM A1035 (high‑strength low‑alloy bars in some jurisdictions), AWS D1.4/D1.4M (welding of reinforcing steel), and ACI 318 (concrete design and use of reinforcement). A706 is developed under ASTM Committee A01 (Steel Reinforcement) and is often specified as the weldable/controlled‑tensile alternative to general grade rebar standards.

Keywords

deformed bars, plain bars, low‑alloy steel, reinforcement, rebar, weldable rebar, controlled tensile properties, yield strength, tensile strength, ASTM A706, A706M, AWS D1.4, testing, bend test, tensile test, bar deformations, bar marking, ICS 77.140.15.

FAQ

Q: What is this standard?

A: ASTM A706/A706M‑24 is the ASTM International specification that defines requirements for deformed and plain low‑alloy steel bars used for concrete reinforcement where enhanced weldability and controlled tensile properties are needed.

Q: What does it cover?

A: It covers grades, chemical composition limits, mechanical properties (yield, tensile, elongation), dimensional and deformation requirements, manufacturer testing (tension, bend, dimensional checks), marking, and requirements for orders in inch‑pound (A706) and SI (A706M) units.

Q: Who typically uses it?

A: Structural and civil engineers, specifiers, rebar mills and fabricators, construction contractors, QC/testing laboratories, and welding engineers — essentially anyone specifying, producing, inspecting, or using weldable reinforcing bars.

Q: Is it current or superseded?

A: The A706/A706M‑24 edition was approved May 15, 2024 and is the current 2024 edition (published in 2024). Users should confirm they are using the 2024 edition and monitor ASTM publications for any subsequent revisions or withdrawals.

Q: Is it part of a series?

A: It is maintained by ASTM Committee A01 (Subcommittee A01.05 on Steel Reinforcement) and complements other ASTM rebar standards (e.g., A615/A615M). It is published as both A706 (inch‑pound) and A706M (SI) in the same document.

Q: What are the key keywords?

A: Low‑alloy, deformed bar, plain bar, rebar, weldable, controlled tensile, Grade 60/80/100, tensile test, bend test, ASTM A706, A706M, reinforcement.