ISO 3923-2:1981 PDF

Name: ISO 3923-2:1981 — Metallic powders — Determination of apparent density — Part 2: Scott volumeter method
SKU: ISO 3923-2:1981
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Metallic powders — Determination of apparent density — Part 2: Scott volumeter method

Название (английский):

ISO 3923-2:1981

Metallic powders — Determination of apparent density — Part 2: Scott volumeter method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 4
Дата публикации:: 1 сентября 1981 г.
Издание:: ISO IS 3923 edition 1 version 1
ICS:: 77.160

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Описание (английский):

IS applicable to powders that will not flow freely through a 5 mm orifice. The oscillating funnel method (part 3) gives better precision, but it cannot be used in cases where the powder may change its properties due to the vibration action applied to the powder during testing. Gives principle, symbols and designations, apparatus, sampling, procedure, expression of results and test report.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 3923-2:1981 defines the Scott volumeter method for determining the apparent density of metallic powders. This standard is essential for powders that do not flow freely through a 5 mm orifice, making traditional funnel methods inadequate. Unlike the oscillating funnel method (ISO 3923-3), which offers higher precision, the Scott volumeter method is preferred when vibration could alter powder properties during testing.

This International Standard specifies the principle, symbols, apparatus, sampling, procedure, expression of results, and reporting requirements. It is crucial for consistent and reliable measurement of apparent density in metallurgical and powder metallurgy applications.

Key Topics

Scope and Applicability Applicable to metallic powders that are not free flowing through a 5 mm orifice. The Scott volumeter method avoids vibration-induced powder property changes.

Apparatus Components

Scott volumeter comprising:
- A two-section funnel with a brass sieve (1.8 mm aperture)
- A baffle box with glass baffles to reduce powder velocity and ensure even filling
- A vibration-free stand and base to hold the apparatus
Cylindrical cup with a fixed volume (25 ± 0.05 cm³) and polished interior
Precision balance with ± 0.05 g accuracy

Principle and Measurement The measured mass of powder filling a cup with a known volume in a loose and uncompressed state represents the apparent density (g/cm³). Powder is cascaded through the apparatus to fill the cup, ensuring accuracy and reproducibility.

Sampling and Preparation Testing is performed on at least 100 cm³ samples, usually in the as-received condition. Drying is permitted under vacuum or inert gas if the powder is oxidation-sensitive, but not if volatiles are present.

Procedure Summary

Pour powder into the Scott volumeter funnel until the cup is filled and powder overflows.
Aid passage through sieve with light brushing if necessary.
Level powder carefully without compressing or vibrating.
Tap cup lightly to settle powder without spilling.
Weigh powder to nearest 0.05 g.
Perform three replicate measurements and report the average apparent density along with highest and lowest values if variance exceeds 1%.

Test Reporting Include identification details of the sample, reference to ISO 3923-2, drying or sample preparation details, test results, any deviations or optional procedures performed, and remarks on any unusual occurrences impacting results.

Applications

Powder Metallurgy Ensures accurate density data for powders used in sintering, pressing, and additive manufacturing processes.

Quality Control Enables manufacturers to verify powder consistency and compliance with material specifications.

Research and Development Supports material scientists in characterizing metallic powders and developing new alloys or powder formulations.

Materials Handling Helps optimize storage, transport, and processing of non-free-flowing metallic powders by providing reliable physical property data.

Related Standards

ISO 3923-1: Metallic powders - Apparent density - Funnel method For powders that flow freely through a 5 mm orifice, using a simple funnel measurement.

ISO 3923-3: Metallic powders - Apparent density - Oscillating funnel method Offers better precision for powders sensitive to vibration, but not suitable when vibration must be avoided.

Additional Powder Metallurgy Standards Standards on sampling, particle size analysis, and flowability support comprehensive powder characterization.

By adhering to ISO 3923-2:1981, industries and laboratories guarantee accurate, reproducible apparent density measurements of metallic powders that resist free flow. This supports robust quality assurance, process optimization, and innovation in powder metallurgy and related fields.

ISO 3923-2:1981 PDF

Abstract

Похожие стандарты

Overview

Key Topics

Applications

Related Standards

Технические детали

ISO 3923-3:1980

Metallic powders — Determination of apparent density — Part 3: Oscillating funnel method

SIST EN 23923-2:2000

Metallic powders - Determination of apparent density - Part 2: Scott volumeter method (ISO 3923-2:1981)

SIST EN ISO 3923-1:2018

Metallic powders - Determination of apparent density - Part 1: Funnel method (ISO 3923-1:2018)