ASTM D5034 is a standard test method for measuring the breaking strength and elongation of textile fabrics using the grab (and modified grab) tensile procedure. It is commonly used for acceptance testing and quality control of woven and many nonwoven fabrics, with options for dry/conditioned and wet testing.
If you are not sure whether grab or modified grab is appropriate for your fabric construction—or you need help aligning grips, capacity, and reporting to a customer requirement—talk with our team.
ASTM D5034 — Standard Test Method for Breaking Strength and Elongation of Textile Fabrics (Grab Test)
ASTM D5034 describes grab and modified grab tensile test procedures to determine breaking strength and elongation for most textile fabrics. The grab approach measures an “effective” fabric strength by gripping only a portion of the specimen width while adjacent yarns contribute to the result.
This method is widely specified for commercial textile evaluations, where repeatable, production-friendly specimen preparation and reporting are needed.
Quick Definition
Document type: Test method.
Primary outputs: Breaking force (breaking strength) and elongation at break from a grab-style tensile test of textile fabrics (with a modified grab option).
Typical use: Acceptance testing / QC comparisons for many woven and nonwoven fabrics, including the ability to run wet tests when required.
What This Standard Covers
ASTM D5034 covers grab and modified grab procedures for determining breaking strength and elongation of most textile fabrics. It includes provisions for wet testing.
The grab procedure is used for woven, nonwoven, and felted fabrics, while the modified grab procedure is used primarily for woven fabrics.
This test method is not recommended for glass fabrics, or for knitted and other highly extensible fabrics (high stretch fabrics are specifically called out as a limitation).
Why This Standard Matters in Testing
ASTM D5034 is frequently used in purchase specifications and internal QC plans because it supports consistent comparisons between lots, suppliers, and production runs. In many textile programs, it provides a practical balance between specimen preparation time and meaningful strength/elongation indicators.
Because grab results include “fabric assistance” from adjacent yarns, results are not directly interchangeable with strip-method fabric tensile results. When requirements call for a full-width strip tensile approach, another method may be specified instead.
Common Materials, Product Types, or Applications Covered
ASTM D5034 is commonly applied to textile fabrics where tensile breaking force and elongation are part of performance verification, such as:
- Woven fabrics (including many industrial and technical textiles)
- Many nonwoven and felted fabrics (grab procedure)
- Higher-strength woven fabrics or constructions where strip specimens may unravel (often evaluated using the modified grab procedure)
Material behavior and construction details can strongly influence results, so test planning should match the standard’s procedure selection to the fabric type being purchased or qualified.
Common Test or Verification Workflow
ASTM D5034 is typically used as part of a tensile performance workflow for incoming inspection, lot release, supplier qualification, or product development benchmarking.
Common workflow steps: Select grab vs. modified grab procedure (based on fabric construction) → prepare specimens → condition and/or wet specimens as required → run tensile pulls to rupture → report breaking force and elongation results in the required unit system.
When labs compare results or resolve disputes, the standard highlights the importance of comparable equipment operation and agreed test settings (for example, using an established time-to-break approach when needed for comparisons).
Equipment Commonly Used for This Standard
ASTM D5034 is typically performed on a universal testing machine (tensile tester) configured for fabric testing, with grips designed for grab-style clamping. Wet testing generally adds the need for appropriate specimen wetting/handling accessories and procedures that maintain consistent specimen condition through the pull.
Common equipment: Universal testing machine with suitable force capacity and resolution, textile/fabric grips for grab testing, appropriate load cell, and a way to determine elongation (often via the test system’s extension measurement approach specified by the test plan).
If you are selecting a tester capacity, grip style, or wet-testing setup for ASTM D5034, you can request a detailed quote for an equipment configuration matched to your fabric range and throughput.
How to Read This Designation or Revision
“ASTM D5034” is the base designation for this textile grab tensile test method. ASTM standards are commonly cited with a year-based suffix showing the edition used.
On ASTM’s standard record, the active edition is shown as ASTM D5034-21(2025) and also identified as D5034-21R25, which indicates the 2021 edition with a 2025 reapproval notation. Always match the cited edition in a customer specification, as permitted procedures, settings, or reporting details can change between revisions.
Related Standards, Methods, or Frameworks
ASTM D5034 references ASTM D5035 for determining breaking force and elongation of textile fabrics using strip-based procedures (raveled strip and cut strip). When a requirement calls for a strip method rather than a grab method, that companion designation is often used for clarification.
Get help specifying an ASTM D5034 test setup
When you need a grab-test-ready tensile system (or you need to confirm whether wet testing, grip type, or capacity selection will meet your requirement), ask for a quote and include your fabric type, expected strength range, and any customer reporting format.
