ASTM D2209-00(2021) PDF

Overview

ASTM D2209-00(2021), Standard Test Method for Tensile Strength of Leather sets out a standardized procedure to determine the tensile strength of various leather types. Developed by ASTM International, this test method provides a reliable measure of the load required to rupture a leather specimen with a standard width, helping ensure consistent quality across leather materials. It is widely used in quality control, development, and specification compliance in the leather industry.

The test is suitable for all smooth, firm leathers that allow accurate thickness measurement. It is not applicable to wet blue leathers. By measuring the force required to break a leather sample and calculating tensile strength from its cross-sectional area, stakeholders can assess key leather properties related to durability and performance.

Key Topics

• Tensile Strength Measurement: Determines the maximum load a leather sample (1/2-in. width) can withstand before rupturing. Results are expressed in psi or kPa.
• Sample Preparation and Orientation: The direction relative to the leather’s backbone and the sampling location on the hide must be documented, as these factors significantly affect tensile strength.
• Applicable Leather Types: The method covers any leather that is smooth and firm enough for accurate measurement, excluding wet blue.
• Apparatus and Procedure:
  • Power-driven testing machine with precise load indicators and grip fixtures
  • Uniform jaw separation speed for consistency
  • Accurate measurement of specimen thickness and width
• Conditioning and Reporting:
  • Conditioning performed according to ASTM D1610
  • Report includes thickness, cross-sectional area, breaking load, tensile strength, and specimen orientation

Applications

ASTM D2209 is integral wherever leather tensile strength is a quality or safety consideration:

• Product Development: Ensures new leather products meet design and durability requirements during R&D.
• Quality Control: Supports ongoing evaluation of leather batches for footwear, upholstery, garments, automotive interiors, and more.
• Specification Compliance: Satisfies procurement or regulatory standards by documenting tensile strength values for supplied materials.
• Service Evaluation: Assesses aged or degraded leathers, predicting performance under use or environmental exposure.
• Industry Acceptance: U.S. Department of Defense and global manufacturers refer to this method for standardization and acceptance testing.

Strength measurements can reveal issues such as improper lubrication, partial degradation, or material inconsistencies, prompting corrective action in manufacturing or sourcing.

Related Standards

• ASTM D1517: Terminology Relating to Leather – Provides definitions for terms used in ASTM D2209.
• ASTM D1813: Test Method for Measuring Thickness of Leather Test Specimens – Specifies thickness measurement techniques integral to tensile strength calculations.
• ASTM D1610: Practice for Conditioning Leather and Leather Products for Testing – Details material conditioning procedures prior to tensile testing.
• ASTM D2211: Test Method for Elongation of Leather – Often paired with tensile testing to evaluate overall leather flexibility and performance.
• International Principles: Developed per WTO Technical Barriers to Trade (TBT) Committee guidelines, ensuring recognition of ASTM D2209 as a credible international reference.

By following the robust approach provided in ASTM D2209-00(2021), manufacturers, suppliers, and buyers can confidently assess and compare the tensile strength of leather products, ensuring materials meet performance, durability, and regulatory expectations. This standard remains a cornerstone for physical property evaluation in the global leather industry.