Metallurgical analysis by C/S/N/O according to ASTM E1019

In ferrous alloys and non-ferrous alloys, carbon, sulfur, nitrogen and oxygen levels directly influence performance properties: mechanical strength, ductility, weldability, fatigue behavior, corrosion resistance and metallurgical cleanliness. A deviation in composition may compromise grade compliance, disrupt a heat treatment or explain a production failure.

The Filab laboratory, ISO 17025 accredited for elemental analysis of metals and alloys, performs metallurgical analysis by C/S/N/O to characterize these light elements and support your incoming inspections, material qualifications, non-conformity investigations and development programs.

The ASTM E1019 analysis mainly applies to steels and cast irons. Depending on the method used and the analytical conditions, the study may also cover other metal alloys. Filab laboratory assesses the compatibility of the matrix with the testing requirements before analysis.

Carbon and sulfur are commonly determined by high-temperature combustion. The gases formed during oxidation of the sample are then measured using instrumental detection. This approach is suitable for the simultaneous determination of carbon and sulfur in metal materials.

C/S/N/O metallurgical analysis provides valuable data for verifying the compliance of an incoming batch, comparing a finished product with a grade requirement, qualifying a supplier or validating specifications. It helps establish the material’s actual composition before manufacturing or commissioning.

The ASTM E1019 metallurgical analysis standard covers the determination of carbon, sulfur, nitrogen and oxygen in steels, cast irons and certain metal alloys. At the Filab laboratory, the analytical approach is defined according to the matrix, target element, expected concentration range and industrial purpose of the test.

The results can be used to compare a material with a specification, verify the consistency of a material certificate or guide a metallurgical investigation. To support interpretation, they may be compared with a metallurgical bath analysis or other material-specific characterizations.

The representativeness of the sample and its surface condition determine measurement reliability. Test specimens must be clean, homogeneous and, wherever possible, free from contamination by oils, coatings, oxides or dust. The Filab laboratory specifies the sampling procedure, required mass and sample format to be supplied.

Nitrogen and oxygen can be determined after melting the sample under an inert gas. The released gases are separated and quantified to establish elemental concentrations. The Filab laboratory selects the preparation and measurement parameters according to the matrix and the expected performance level.

Measuring light elements can support the analysis of embrittlement, porosity, welding defects, or variations in mechanical properties. It can also be used to monitor the effects of manufacturing, refining, heat treatment, or melting operations. Depending on the context, the Filab laboratory may combine this measurement with an analysis according to ASTM E165 or with other targeted examinations.

To prepare a request, you should specify the material designation, the form and number of samples, the elements to be measured, the expected concentrations, the applicable standard or specification, and the purpose of the inspection. The Filab laboratory reviews this information in order to offer a suitable service. To learn more about standardized testing, also discover the analysis according to ASTM D2765 in the laboratory.