Carbon, Sulfur, Oxygen, Nitrogen & Hydrogen Analysis for Metals, Minerals, and Ores

In the highly demanding world of metals, minerals, and ores, every detail matters. From the elemental makeup of raw ores to the precise composition of refined metals, obtaining fast, accurate, and reproducible data is essential for ensuring quality, efficiency, and meeting compliance with stringent standards.

At LECO, we turn complex material analysis into clear, actionable results. Our advanced instrumentation and trusted technologies empower mining labs, steel mills, and foundries to optimize processes and validate materials across the entire lifecycle—from raw materials characterization to finished metal certification.

Get rid of guesswork with our line of metallographic instruments, built to adequately prepare your samples for in-depth, accurate analyses. Our sectioning machines, mounting presses, grinder/polishers, hardness testers, and metallographic microscopes enable clear visualization of grains, phases, inclusions, and defects, supporting quality control and process optimization across a wide range of materials.

We deliver precise determination of critical elements including carbon, sulfur, oxygen, nitrogen, and hydrogen (C/S/O/N/H). Trust LECO’s flagship solutions—including our CS/ONH Analyzers (like the CS844 or ONH836), and Glow Discharge Spectrometers (GDS950)—for industry-leading reliability and compliance with ASTM and ISO standards.

Join the global community of professionals who rely on LECO to drive performance and innovation in their metallurgical and mining workflows. Scroll below to explore our featured instruments and access technical resources tailored to your specific material challenges.


Webinars

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Bulk Analysis of Low Alloy, Cr-Mo, Free Machining, and Austenitic High Mn Steels

Chemical composition is essential for accurate steel identification and classification, as mechanical properties alone cannot reliably distinguish alloy types. Using the LECO GDS900, producers can determine iron, carbon, alloying elements such as chromium, nickel, manganese, vanadium, and molybdenum, as well as modifiers like sulfur and lead. The glow discharge source minimizes metallurgical history effects, reduces…
Bulk Carbon Gradient in Carburized Steel using GDS900

Bulk Carbon Gradient in Carburized Steel using GDS900

This application note demonstrates how the LECO GDS900 can be utilized to characterize carburized steel using the ® standard low alloy steel method for bulk analysis. First, an unprepared surface is analyzed to a depth of approximately 100 μm. Next, successive layers are removed by “precision” grinding 100 μm at a time and performing analysis…
Determination of Moisture in Welding Flux

Determination of Moisture in Welding Flux

Determination of Moisture in Welding Flux Overview The American Welding Society (AWS) method A4.4M:2001 (R2006) “Standard Procedures for Determination of Moisture Content of Welding Fluxes and Welding Electrode Flux Coatings” outlines the appropriate methodology for sample preparation and analysis for this application. Moisture content in the flux can be correlated to the hydrogen content in […]
Basic Metallographic Analysis of Welds

Basic Metallographic Analysis of Welds

Basic Metallographic Analysis of Welds Overview Dave Coulston discusses what benefits can be derived from the different weld examinations and how best to prepare welds for such analyses, as well as typical weld measurements and examples of automated hardness testing of welds. Presenter Complete the form to access this webinar

Application Notes


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