ISO 5940-2:2007 PDF

Name: ISO 5940-2:2007 — Carbonaceous materials used in the production of aluminium — Pitch for electrodes — Part 2: Determination of the softening point (Mettler softening point method)
SKU: ISO 5940-2:2007
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Carbonaceous materials used in the production of aluminium — Pitch for electrodes — Part 2: Determination of the softening point (Mettler softening point method)

Название (английский):

ISO 5940-2:2007

Carbonaceous materials used in the production of aluminium — Pitch for electrodes — Part 2: Determination of the softening point (Mettler softening point method)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 8
Дата публикации:: 17 апреля 2007 г.
Издание:: ISO IS 5940 edition 1 version 1
ICS:: 71.100.10

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Описание (английский):

ISO 5940-2:2007 specifies a method to determine the softening point of pitches by the Mettler method, within the range of 50 °C to 180 °C. It can be used for other organic materials that are used as binder and impregnating agents, where they have a Mettler softening point within the range of 50 °C to 150 °C.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 5940-2:2007 sets out the international standard method for determining the softening point of pitches-primarily coal-tar pitch-used in the production of aluminium electrodes, using the Mettler softening point method. This standard is applicable within a temperature range of 50 °C to 180 °C and is also suitable for other organic binder and impregnating materials falling within a softening point range of 50 °C to 150 °C. The standard provides clear and consistent procedures, ensuring the reliability and comparability of results in the global aluminium industry.

Key Topics

Scope and Applicability: ISO 5940-2:2007 is focused on pitches used as binder and impregnating agents, covering both grindable and non-grindable materials within the specified temperature range.

Test Principle: The standard details how a pitch sample is progressively heated in a controlled environment, with the temperature at which softened material interrupts a light barrier-19 mm below the cup outlet-defined as the Mettler softening point.

Apparatus Requirements:

Electrically heated furnace
Sample cup and holder
Resistance thermometer (50 °C to 180 °C)
Light barrier
Temperature control unit
Material collector
Calibration checks and specific sampling tools

Sample Preparation: Both melting and pressing techniques for preparing pitch samples are covered, as well as requirements for sample size, handling, and consistency.

Calibration and Precision: The standard describes calibration procedures and precision criteria, with repeatability and reproducibility guidelines to ensure accuracy across different laboratories.

Reporting Requirements: A comprehensive list of the details required in the test report, including apparatus specifications, sample identification, test conditions, and full results.

Applications

Adopting ISO 5940-2:2007 in industrial and laboratory settings offers several practical benefits:

Aluminium Production: Ensures that coal-tar pitch used for carbon anodes in aluminium smelting meets uniform quality standards, directly influencing process efficiency and product quality.

Quality Control: Laboratories and manufacturers use this method to reliably assess the softening characteristics of raw or processed binder pitches, facilitating regulatory compliance and material selection.

Comparability of Results: The use of an internationally recognized method supports consistent results between different manufacturers and testing facilities, aiding global trade and procurement.

Material Innovation: Research institutions and industries developing new binder or impregnating materials for electrodes can use the Mettler softening point determination to benchmark performance and suitability.

Calibration and Cross-Verification: The standard references conversion to other softening point methods (e.g., ring-and-ball, Kraemer-Sarnow, cube-in-air), supporting cross-validation in multi-method laboratories.

Related Standards

To complement ISO 5940-2:2007, the following standards are relevant within the field of carbonaceous materials and softening point determination:

ISO 6257: Carbonaceous materials used in the production of aluminium - Pitch for electrodes - Sampling

ISO 5940-1: Determination of the softening point by the ring-and-ball method

DIN 52011 & DIN 52025: Methods for alternative softening point measurements (ring-and-ball, Kraemer-Sarnow)

ASTM D2319: Standard test method for softening point of pitch (cube-in-air)

ASTM D3104: Standard test method for softening point of pitches (Mettler method)

DIN 51848-1: Testing of mineral oils - precision guidance for laboratory methods

Employing ISO 5940-2:2007 guarantees reliable, reproducible softening point measurements for pitches and organic binders, underpinning quality assurance and process control in the aluminium industry and related sectors.

ISO 5940-2:2007 PDF

Abstract

Похожие стандарты

Overview

Key Topics

Applications

Related Standards

Технические детали

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Carbonaceous materials used in the production of aluminium — Pitch for electrodes — Sampling

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