ISO 12004-2-2021 PDF
Name in English:
St ISO 12004-2-2021
Name in Russian:
Ст ISO 12004-2-2021
Original standard ISO 12004-2-2021 in PDF full version. Additional info + preview on request
Full title and description
ISO 12004-2:2021 — Metallic materials — Determination of forming‑limit curves for sheet and strip — Part 2: Determination of forming‑limit curves in the laboratory. This part specifies laboratory testing conditions and procedures for constructing forming‑limit curves (FLCs) for flat metallic sheet and strip under linear strain paths at ambient temperature, with recommended thickness ranges and specimen preparation requirements for reliable ductility assessment in the laboratory environment.
Abstract
This document specifies testing conditions to be used when constructing a forming‑limit curve (FLC) in a laboratory at ambient temperature using linear strain paths. The standard applies to flat metallic sheets and strips with thicknesses generally between 0.3 mm and 4 mm (with specific recommendations for materials such as steel). It standardizes the laboratory procedures used to determine the limits of formability for sheet and strip materials.
General information
- Status: Published (International Standard).
- Publication date: 10 February 2021 (Edition 2, 2021‑02).
- Publisher: International Organization for Standardization (ISO).
- ICS / categories: 77.040.10 — Mechanical testing of metals / Ductility testing.
- Edition / version: Edition 2 (2021).
- Number of pages: 27 pages.
Scope
Specifies laboratory test conditions and procedures for constructing forming‑limit curves for metallic sheet and strip using linear strain paths at ambient temperature. The standard is intended for flat metallic materials with thicknesses typically between 0.3 mm and 4 mm and includes recommendations (for example, a recommended maximum thickness for some steels) to ensure meaningful FLC construction and repeatability of results.
Key topics and requirements
- Definition of laboratory test conditions and controlled variables required when constructing an FLC (ambient temperature, punch/blankholder arrangements, measurement techniques).
- Application of linear strain paths for specimen deformation during FLC determination and guidance on strain‑path control and measurement.
- Material applicability and thickness limits (nominally 0.3 mm to 4 mm; guidance/recommendations for steel sheet maximum thicknesses).
- Specimen preparation, measurement and data reduction practices needed to produce a reproducible forming‑limit curve in the laboratory environment.
- Relationship to press‑shop/industrial measurement methods (complements Part 1, which covers press‑shop measurement and application).
Typical use and users
Used by materials testing laboratories, metallurgical and mechanical testing specialists, R&D teams, automotive and aerospace forming engineers, and quality/assurance groups needing standardized laboratory procedures to determine sheet formability limits, validate material specifications and compare forming performance across batches or alloys. The standard supports development, qualification and process design activities where laboratory FLC data are required.
Related standards
ISO 12004 series (Part 1: Measurement and application of forming‑limit diagrams in the press shop — ISO 12004‑1:2020) is the companion document addressing press‑shop measurement and application. The 2021 revision of Part 2 supersedes the 2008 edition (ISO 12004‑2:2008). The standard is often published/adopted in regional collections as EN ISO 12004‑2:2021. Other adjacent metal testing standards (e.g., tensile tests such as ISO 6892‑1) are commonly used alongside FLC methods for comprehensive sheet metal characterization.
Keywords
forming‑limit curve, forming‑limit diagram, FLC, sheet metal formability, strip, linear strain path, laboratory method, ductility testing, ISO 12004.
FAQ
Q: What is this standard?
A: ISO 12004‑2:2021 is Part 2 of the ISO 12004 series; it is an International Standard that specifies laboratory methods and testing conditions for constructing forming‑limit curves (FLCs) for metallic sheet and strip.
Q: What does it cover?
A: It covers laboratory procedures, controlled test conditions (ambient temperature, linear strain paths), specimen preparation and measurement/data reduction guidance for producing reproducible forming‑limit curves for flat metallic sheets and strips (typically 0.3–4 mm thickness).
Q: Who typically uses it?
A: Materials testing laboratories, metallurgists, forming and process engineers (automotive, aerospace, appliance manufacturing), research institutions, and quality/assurance teams that need standardized laboratory FLC data for material evaluation, process design and comparison.
Q: Is it current or superseded?
A: Current — ISO 12004‑2:2021 (Edition 2) is the published and active version, replacing the earlier ISO 12004‑2:2008. The document is subject to ISO's periodic review cycle.
Q: Is it part of a series?
A: Yes — it is Part 2 of the ISO 12004 series on determining forming‑limit curves for sheet and strip; Part 1 (ISO 12004‑1:2020) covers press‑shop measurement and application of forming‑limit diagrams.
Q: What are the key keywords?
A: Forming‑limit curve (FLC), forming‑limit diagram (FLD), sheet metal formability, linear strain path, laboratory test method, ductility testing, ISO 12004.