ASTM A434/A434M-24 PDF
Name in English:
St ASTM A434/A434M-24
Name in Russian:
Ст ASTM A434/A434M-24
Original standard ASTM A434/A434M-24 in PDF full version. Additional info + preview on request
Full title and description
Standard Specification for Steel Bars, Alloy, Hot‑Wrought or Cold‑Finished, Quenched and Tempered — ASTM A434/A434M‑24. This specification defines composition, processing, heat treatment, mechanical property requirements, and testing for hot‑wrought and cold‑finished quenched and tempered alloy steel bars used in engineering and manufacturing applications.
Abstract
This specification covers hot‑wrought and cold‑finished quenched and tempered alloy steel bars produced by open‑hearth, basic oxygen, or electric furnace melt processing and subject to an austenitic grain size requirement. It establishes strength classes, dimensional/condition limits, and required mechanical tests (tension tests for yield strength, tensile strength, and elongation). Values are published in both SI and inch‑pound units (each system to be used independently).
General information
- Status: Current / Active.
- Publication date: October 15, 2024.
- Publisher: ASTM International.
- ICS / categories: 77.140.60 (Steel bars and rods).
- Edition / version: A434/A434M‑24 (replaces A434/A434M‑18).
- Number of pages: 3.
Scope
The standard applies to hot‑wrought and cold‑finished quenched and tempered alloy steel bars. Hot‑wrought bars are specified in strength classes BB, BC, and BD; cold‑finished bars in classes BB and BC. The specification covers applicable sizes and conditions, unit systems (SI and inch‑pound treated separately), required melt processing methods, grain size requirements, and required mechanical testing to verify conformance.
Key topics and requirements
- Material types: hot‑wrought and cold‑finished alloy steel bars, quenched and tempered.
- Strength level classes: BB, BC, and BD for hot‑wrought; BB and BC for cold‑finished.
- Melt processing: open‑hearth, basic oxygen, or electric furnace specified.
- Austenitic grain size requirement and dimensional/size limits for specified conditions.
- Mechanical testing: tension tests for yield strength, tensile strength, and elongation to confirm conformity.
- Units: SI and inch‑pound units are both published but treated independently (do not mix).
Typical use and users
Used by steel producers, bar manufacturers, machinists, heat‑treatment shops, quality/control laboratories, design and procurement engineers, and specifiers who require quenched‑and‑tempered alloy bars meeting defined mechanical and metallurgical criteria for components, fasteners, shafts, pins, and other engineered parts.
Related standards
This specification is published within ASTM's Book of Standards (Subcommittee A01.15 / Volume 01.05) and replaces the prior A434/A434M‑18 edition. Users commonly reference related ASTM standards on material testing and bar/rod specifications and testing procedures when applying A434/A434M‑24 (for example, tensile test methods and complementary bar standards).
Keywords
alloy steel bars, quenched and tempered, hot‑wrought, cold‑finished, strength classes BB BC BD, mechanical properties, tensile testing, ASTM A434/A434M‑24, austenitic grain size.
FAQ
Q: What is this standard?
A: ASTM A434/A434M‑24 is the ASTM International specification that defines requirements for hot‑wrought and cold‑finished quenched and tempered alloy steel bars, including processing, heat treatment, strength classes, and testing.
Q: What does it cover?
A: It covers material form (bars), allowable production methods (furnace types), austenitic grain size, strength level classifications, size/condition limits, and mandatory mechanical tests (tension tests for yield, tensile strength, and elongation). It also clarifies the separate use of SI and inch‑pound units.
Q: Who typically uses it?
A: Steelmakers, bar manufacturers, heat‑treaters, machinists, quality/control laboratories, design and procurement engineers, and specifiers who require confirmed mechanical and metallurgical properties for alloy steel bar applications.
Q: Is it current or superseded?
A: The A434/A434M‑24 edition is current (published October 15, 2024) and supersedes the A434/A434M‑18 edition.
Q: Is it part of a series?
A: It is part of ASTM's steel bars and rods suite of specifications maintained by Subcommittee A01.15 and published in the Book of Standards (Volume 01.05); it carries the dual designation A434/A434M to indicate both inch‑pound and SI references.
Q: What are the key keywords?
A: alloy steel bars; quenched and tempered; hot‑wrought; cold‑finished; strength classes BB/BC/BD; tensile testing; austenitic grain size; ASTM A434/A434M‑24.