Значение и использование

This practice covers all aspects of sampling and preparing steel and iron for chemical analysis as defined in Test Methods, Practices, and Definitions A 751 and Specification A 48/A 48M. Such subjects as sampling location and the sampling of lots are defined.

It is intended that this practice include most requirements for sampling steel and iron for analysis. Standard analytical methods that reference this practice need contain only special modifications and exceptions.

It is assumed that all who use these procedures will be trained samplers capable of performing common sampling operations skillfully and safely. It is expected that only proper sampling equipment will be used.

Область применения

1.1 This practice covers the sampling of all grades of steel, both cast and wrought, and all types (grades) of cast irons and blast furnace iron for chemical and spectrochemical determination of composition. This practice is similar to ISO 14284.

1.2 This practice is divided into the following sections.

SectionsRequirements for Sampling and Sample Preparation6General6.1Sample6.2Selection of a Sample6.3Preparation of a Sample6.4Liquid Iron for Steelmaking and Pig Iron Production7General7.1Spoon Sampling7.2Probe Sampling7.3Preparation of a Sample for Analysis7.4Liquid Iron for Cast Iron Production8General8.1Spoon Sampling8.2Probe Sampling8.3Preparation of a Sample for Analysis8.4Sampling and Sample Preparation for the Determination ofOxygen and Hydrogen8.5Liquid Steel for Steel Production9General9.1Probe Sampling9.2Spoon Sampling9.3Preparation of a Sample for Analysis8.4Sampling and Sample Preparation for the Determinationof Oxygen9.5Sampling and Sample Preparation for the Determinationof Hydrogen9.6Pig Irons10General10.1Increment Sampling10.2Preparation of a Sample for Analysis10.3Cast Iron Products11General11.1Sampling and Sample Preparation11.2Steel Products12General12.1Selection of a Laboratory Sample or a Sample forAnalysis from a Cast Product12.2Selection of a Laboratory Sample or a Sample forAnalysis from a Wrought Product12.3Preparation of a Sample for Analysis12.4Sampling of Leaded Steel12.5Sampling and Sample Preparation for the Determinationof Oxygen12.6Sampling and Sample Preparation for the Determinationof Hydrogen12.7Keywords13 AnnexesSampling Probes for Use with Liquid Iron and SteelAnnex A1Sampling Probes for Use with Liquid Steel for theAnnex A2Determination of Hydrogen

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

1.4 For specific precautions, see 6.4.3.5, 9.4.4.3, and 12.5.1.1 as well as Section 5.