ASTM A706/A706M-25 PDF

Full title and description

ASTM A706/A706M-25 — Standard Specification for Deformed and Plain Low‑Alloy Steel Bars for Concrete Reinforcement. This specification covers deformed and plain low‑alloy steel bars in cut lengths and coils intended for use as concrete reinforcement where controlled tensile properties and enhanced weldability are required.

Abstract

A706/A706M-25 defines mechanical and chemical requirements, permitted grades, and test methods for low‑alloy reinforcing bars (rebar) produced for welding and other controlled‑tensile applications. Required tests include tension, bend, and dimensional verification for each bar size rolled from a heat; limits for chemical composition and carbon equivalent are included to improve weldability; annexes provide methods for alternate sizes and uniform elongation when specified.

General information

• Status: Active.
• Publication date: October 15, 2025 (document shown active/last updated Nov 5, 2025).
• Publisher: ASTM International.
• ICS / categories: Steels for reinforcement of concrete — ICS code commonly listed as 77.140.15.
• Edition / version: A706/A706M-25 (current edition).
• Number of pages: 10 pages (main document).

Scope

This specification applies to deformed and plain low‑alloy steel bars supplied in cut lengths or coils for concrete reinforcement where restrictive mechanical properties and chemical composition are required for compatibility with controlled tensile property applications or to enhance weldability. The standard defines nominal sizes/dimensions, required mechanical property limits and testing, chemistry and carbon equivalent limits for weldability, and optional annexes for alternate sizes and uniform elongation methods.

Key topics and requirements

• Grades: minimum yield strength levels are defined (Grade 60 [420 MPa], Grade 80 [550 MPa], and Grade 100 [690 MPa] in the 2025 edition).
• Controlled tensile properties: specified tensile and yield limits and elongation requirements to ensure predictable behavior in controlled‑tensile and welded applications.
• Weldability: limits on chemical composition and carbon‑equivalent values to improve weldability and recommendation to follow applicable AWS welding procedure guidance.
• Testing: mandatory tension and bend tests and dimensional/deformation measurements for bars rolled from each heat; retest provisions when specimens fail requirements.
• Annexes and supplementary requirements: includes annexes addressing alternate bar sizes and methods to determine uniform elongation (Annex A2 mandatory when Supplementary Requirement S1 is specified).
• Notes on compatibility: the standard includes advisory notes (for example, on mechanical splice qualification relative to high‑strength grades and ACI splice criteria).

Typical use and users

Used by structural engineers, fabricators, precast manufacturers, rebar producers, welding procedure developers, construction quality inspectors, and procurement/specification writers where welding of reinforcement or controlled tensile properties are required. Typical applications include welded connections, seismic detailing where predictable ductility is needed, precast elements, and projects specifying higher‑strength or low‑alloy reinforcement.

Related standards

Commonly referenced alongside other reinforcing‑steel and welding standards, for example ASTM A615/A615M (carbon rebar), ASTM A1035 (microalloyed rebar), ACI 318 (Building Code Requirements for Structural Concrete) for design and splicing criteria, and AWS D1.4/D1.4M for welding guidance. Previous and historical editions of A706/A706M (e.g., -24, -22, -16) provide context for changes.

Keywords

rebar, reinforcement, low‑alloy steel, deformed bars, plain bars, weldable rebar, carbon equivalent, tensile properties, Grade 60, Grade 80, Grade 100, ASTM A706, A706M

FAQ

Q: What is this standard?

A: ASTM A706/A706M-25 is the ASTM International standard specification that sets requirements for deformed and plain low‑alloy steel bars intended for concrete reinforcement where controlled tensile properties and improved weldability are required.

Q: What does it cover?

A: It covers allowable grades and strength levels, chemical composition and carbon‑equivalent limits for weldability, required mechanical tests (tension, bend, dimensional checks), marking and ordering provisions for plain and deformed bars, and annexes that address alternate sizes and methods for measuring uniform elongation.

Q: Who typically uses it?

A: Structural engineers, fabricators, rebar manufacturers, welding engineers, quality assurance personnel, and specifiers for construction and precast concrete projects — especially where welding of reinforcement or predictable tensile behavior is required.

Q: Is it current or superseded?

A: A706/A706M-25 is the current active edition (published in 2025; the -24 edition was published in 2024 and later withdrawn). Users should verify the exact publication and amendment history when specifying a version for contracts.

Q: Is it part of a series?

A: It is part of ASTM’s suite of reinforcing‑steel specifications developed by Committee A01 (steel) and is commonly used together with other ASTM reinforcing standards (for example, A615, A1035) and with design codes such as ACI 318.

Q: What are the key keywords?

A: Rebar, low‑alloy, deformed bar, plain bar, weldable, carbon equivalent, Grade 60, Grade 80, Grade 100, tensile properties, ASTM A706/A706M.