Category ASTM Standards

🔬 Scope and Application of D4645-08 This standard test method, designated D4645-08, covers the determination of the in-situ state of stress in rock using the hydraulic fracturing method. It is the widely accepted field method available for in situ stress…

🧪 Scope and Key Limitations ASTM D4646-16 (Reapproved 2023) defines a standard 24-hour batch-type procedure for determining the sorption affinity of waste solutes by unconsolidated geologic material (soils and sediments) in an aqueous suspension. The waste solute may be derived…

ASTM D4644-16 provides a standardized laboratory procedure for determining the resistance of shales and other similar weak rocks to degradation during combined wetting and mechanical abrasion. This test method yields the Slake Durability Index (Id2), a fundamental geotechnical parameter used…

🎯 Scope and Significance ASTM D4642-04 specifically outlines a reliable wet chemistry method for determining the platinum content in nonzeolitic, fresh reforming catalysts where platinum is the only precious metal present. The test method is validated for the concentration range…

ASTM D4643-17 is a standard test method for determining the water content of soil and rock by microwave oven heating. It provides a faster alternative to conventional oven drying, with specific guidelines for accuracy and significant digits. This method is…

This standard practice, designated D4641-17, provides a computational method for determining pore size distributions in catalysts and catalyst carriers using nitrogen desorption isotherms. The method is based on the Kelvin equation and assumes a cylindrical pore model. It is applicable…

These test methods cover the determination of the saponification number of tall oil and products obtained by fractionation, including rosin, fatty acids, and distilled tall oil, as defined in Terminology D804. They are also applicable to gum and wood rosin.…

📖 Definition and Scope This standard, designated D4640-86 (Reapproved 2022), establishes a test method for determining the stroke cure time of thermosetting phenol-formaldehyde resins. The test method covers the determination of the cure rate at any specified temperature. The stroke…

🧪 Overview and Significance of the Test Method ASTM D4639-86 (Reapproved 1996) describes a standard procedure for determining the volatile content in solid phenolic resins. The test method specifically addresses matter that is volatile at a temperature of 300°F (150°C).…

ASTM D4637/D4637M – 15 (Reapproved 2021) defines the material requirements for flexible ethylene-propylene-diene terpolymer (EPDM) sheets intended for use in single-ply roofing membranes exposed to weathering. The standard establishes minimum property limits to ensure a consistent quality baseline for the…

📐 Sample Types and Collection Requirements This guide, designated ASTM D4638-16 (Reapproved 2023), specifies standardized procedures for preparing biological samples from aquatic environments—including streams, rivers, ponds, lakes, estuaries, and oceans—for inorganic chemical analysis. It covers diverse organisms such as plankton,…

ASTM D4635-16 provides specifications for plastic films made from low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE) for general use and packaging applications. Films covered have densities from 0.910 to 0.925 g/cm³ per Specification D4976, with thickness up to 101.6…