ASTM B855 defines a standard test method for measuring the volumetric flow rate of metal powders using the Arnold Meter and Hall Flowmeter Funnel. It is a practical reference for comparing powder flow behavior under a controlled test setup, which can support materials evaluation, incoming inspection, and process consistency. By focusing on a repeatable test method, ASTM B855 helps users assess whether a metal powder meets expected handling and quality-control requirements.

What is ASTM B855?

ASTM B855 is a test method that addresses the volumetric flow rate of metal powders with two commonly recognized flow-testing devices: the Arnold Meter and the Hall Flowmeter Funnel. The standard provides a technical basis for measuring how a powder flows in a defined test condition, helping users obtain comparable results across samples and test runs. As an ASTM standard, it is intended to support consistent testing practices and clearer communication between suppliers, purchasers, and laboratories.

Where is ASTM B855 used?

ASTM B855 is commonly used in laboratories, quality control departments, and materials evaluation workflows that handle metal powders. It is relevant anywhere powder flow behavior needs to be checked using the Arnold Meter or Hall Flowmeter Funnel, such as during receiving inspection, product qualification, or routine process monitoring. Because powder flow can affect handling and downstream processing, the standard is useful in technical settings where repeatable test data is needed for comparison and documentation.

Why is ASTM B855 important?

ASTM B855 matters because it supports a consistent way to measure and report powder flow rate, reducing ambiguity in test results and procurement discussions. For metal powder users, a defined test method can improve quality control, help identify lot-to-lot differences, and support compliance with internal or customer requirements. ASTM B855 also provides a shared technical reference that can reduce misunderstanding when evaluating powder performance for production or engineering use.

• Volumetric flow rate measurement
• Metal powder testing
• Arnold Meter and Hall Flowmeter Funnel
• Quality control and comparison