ASTM E385

ASTM E385 is the ASTM standard for determining oxygen content using a 14-MeV neutron activation and direct-counting technique. It describes a laboratory test method for measuring oxygen in a controlled way, helping users obtain consistent analytical results for material evaluation and quality control. Because oxygen content can affect performance and material integrity, this standard is useful when accurate measurement and repeatable testing are important for technical review, procurement, or compliance-related work.

ASTM E385 standard overview

The official title, Standard Test Method for Oxygen Content Using a 14-MeV Neutron Activation and Direct-Counting Technique, shows that ASTM E385 focuses on a specific analytical approach for oxygen measurement. It is a test method rather than a product specification, so its value lies in defining how the measurement is performed and reported. That makes it a practical reference for laboratories and technical teams that need a recognized method for oxygen content determination in materials testing workflows.

Where is ASTM E385 used?

ASTM E385 is typically used in testing environments where oxygen content must be measured with a defined neutron activation and direct-counting procedure. It is most relevant to laboratories, analytical service providers, and quality teams handling materials or components where oxygen analysis is part of acceptance or characterization work. The standard may support routine evaluation, comparative testing, and documentation when a recognized ASTM method is needed for consistent results.

Practical importance of ASTM E385

In practice, ASTM E385 helps reduce uncertainty by giving organizations a standardized way to measure oxygen content. That supports better consistency between laboratories, clearer procurement requirements, and more reliable technical records. For users focused on compliance or product evaluation, the method can help align testing practices and limit variation caused by informal procedures. It is especially useful when oxygen measurement needs to be repeatable, traceable, and suitable for quality control decisions.

• Oxygen content determination
• 14-MeV neutron activation technique
• Direct-counting measurement method
• Laboratory testing and quality control
• Standardized analytical procedure