Metallurgical Lab Frequently Asked Questions

Metallurgical Lab Frequently Asked Questions

What services does the Metallurgical Lab offer?

Our Metallurgical Lab provides a comprehensive range of testing and analysis services to evaluate the properties, quality, and performance of metallic materials. When you work with our lab, you work directly with the technician handling your project—from quote to report. There’s no hand-off between departments and no miscommunication along the way. Your job is managed by one person who understands your requirements, performs the analysis, and delivers the final report.

Our services include:

1. Micro-Vickers hardness testing (ASTM E384)
2. Rockwell (HRC/HRA) hardness testing (ASTM E18)
3. Microstructure analysis, metallography, and image analysis
4. Micro and macro etching and evaluation of ferrous and non-ferrous alloys
5. Material and heat treatment identification
6. Core hardness testing (micro and macro)
7. Case depth evaluation ofcarburized, nitrided, induction hardened, and other case-hardened or coatedparts
8. Compound layer thicknessand diffusion zone depth measurement
9. Grain size assessment perASTM standards
10. Chemical composition analysis via spectrometry (OES/ICP)
11. SEM/EDX analysis for advanced fracture and surface investigations
12. Spot testing for black oxidized parts
13. Fractography, failure analysis, and visual examination of fractured parts
14. Material consultation and characterization, including material selection and heat treatment recommendations for industrial applications

What equipment and resources are used in the Metallurgical Lab?

Our lab is equipped with calibrated instruments and staffed by an experienced in-house Professional Engineer (P.Eng.) with over 15 years of experience in heat treatment, material characterization, and fabrication. Our equipment includes:

• Mitutoyo Micro-Vickers Hardness Tester
• Rockwell (HRC, HRA) Hardness Testers (benchtop and portable)
• Nikon Stereomicroscope
• Leco Inverted Light Microscope (up to 2000× magnification)
• Metallurgical Grinding & Polishing Machine
• Water-Cooled Sectioning Saw
• Specimen Cold and Hot Mounting Systems
• Chemicals for micro and macro etching
• Photo booth and camera for photomicrography and photomacrography
• Optical Emission Spectrometer (OES) and ICP for chemical composition analysis
• Scanning Electron Microscope (SEM) with Energy Dispersive X-ray (EDX) analysis

What is Micro-Vickers Hardness Testing?

Micro-Vickers hardness testing is a precise, repeatable method of measuring hardness on a microscopic scale using a diamond indenter under loads below 1 kg. It is the primary method for measuring case depth in all case-hardening processes, including nitriding, nitrocarburizing, carburizing, and induction hardening.

This method provides accurate hardness measurements for a wide variety of materials, including both ferrous and non-ferrous alloys. It involves specialized cross-sectioning and metallographic preparation techniques, with results viewed through an optical microscope. We follow the ASTM E384 standard for all Micro-Vickers testing.

Micro-Vickers is especially valuable for mapping hardness gradients from surface to core, confirming effective and total case depth, identifying over-tempering or soft zones, and verifying that heat treatment processes have achieved the desired results.

What is Rockwell (HRC) Hardness Testing?

Rockwell hardness testing measures the hardness of materials by indenting the surface with a diamond cone or steel ball under a major load. The HRC scale is the most common for harder materials, while HRA is used for thinner cases or cemented carbides.

Rockwell testing is the most widely used hardness testing method, primarily because it is simple to perform, provides fast results, and does not require highly skilled operators. It can determine the hardness of most materials and alloys, from the softest to the hardest steels. We follow the ASTM E18 standard for all Rockwell testing.

This test is ideal for verifying core hardness, confirming through-hardened components meet specification, and performing incoming material inspection.

What is Microstructure Analysis and Evaluation?

Microstructure analysis involves examining the internal structure of materials at a microscopic level to understand phase distribution, grain size, and other metallurgical characteristics. This analysis helps assess material properties and performance for quality control, engineering, design, and failure analysis.

In combination with hardness testing and knowledge of the material’s processing history, microstructure evaluation provides a deep and comprehensive understanding of how a material will behave under various conditions. This is especially valuable for verifying heat treatment effectiveness, identifying anomalies such as retained austenite, carbide networks, or intergranular oxidation (IGO), and comparing case and core microstructures in carburized or nitrided parts.

Our metallographic evaluations support compliance with industry standards such as AGMA, AMS, ASTM, and CQI-9, and help customers avoid premature failures related to pitting, tooth breakage, distortion, or fatigue.

What is Micro and Macro Etching?

Etching is a chemical treatment process used to reveal either the microstructure or macrostructure of a material for examination. Micro etching reveals fine details such as grain boundaries, phase distribution, and heat-affected zones. Macro etching reveals gross features such as segregation, grain flow patterns, cracks, porosity, and weld penetration.

Etching is a fundamental step in metallographic analysis and is essential for assessing a material’s heat treatment history, processing quality, and structural integrity. We use a range of etchants appropriate to the alloy being examined, including Nital, Picral, and others for ferrous alloys, and specialized reagents for non-ferrous materials.

What is Material and Heat Treatment Identification?

This service involves identifying the type of material and the specific heat treatment it has undergone. This is crucial for verifying that incoming material meets the required specifications, confirming that the correct heat treatment process was applied, and reverse-engineering competitor or legacy components.

Selecting the right material and heat treatment for your application is one of the most important steps in developing new parts. Getting it right the first time saves significant time and money by avoiding future failures, non-conformances, and costly redesigns. Our team can advise on material selection and heat treatment options tailored to your specific application and performance requirements.

What is Core Hardness Testing?

Core hardness testing measures the hardness of a material’s interior, as opposed to its surface. This is important for understanding the material’s overall strength, ductility, and resistance to deformation under load.

Core hardness is a critical parameter for case-hardened parts, where the surface is intentionally harder than the core. Verifying that core hardness is within specification ensures the component has the right balance of surface wear resistance and core toughness for its intended application.

How is Case Depth Evaluated on Carburized and Case-Hardened Parts?

Carburizing is a surface hardening process that introduces carbon into the outer layer of steel at elevated temperatures, creating a hard, wear-resistant case with a tough, ductile core. It is ideal for gears, shafts, and high-load components.

We evaluate case depth by cross-sectioning the part and performing a Micro-Vickers hardness traverse from the surface inward to the core, in accordance with applicable ASTM and customer specifications. This same method applies to other case-hardening processes, including induction hardening, carbonitriding, and laser hardening. Our reports include hardness profiles, effective and total case depth measurements, and micrographs of the case and core microstructure.

How is Case Depth Evaluated on Nitrided Parts?

Nitriding and nitrocarburizing are surface hardening processes that introduce nitrogen (and carbon, in the case of nitrocarburizing) into the material’s surface, creating a compound layer and a diffusion zone beneath it.

We evaluate nitrided case depth using Micro-Vickers hardness traverses from surface to core, and by metallographic examination of the compound layer thickness and diffusion zone depth. This data confirms that the nitriding process achieved the desired surface hardness, case depth, and microstructure uniformity. Our reports include annotated micrographs and complete hardness profiles.

What is Chemical Composition Analysis?

Chemical composition analysis determines the elemental makeup of a material using techniques such as Optical Emission Spectrometry (OES) and Inductively Coupled Plasma (ICP) spectrometry. This is essential for verifying that a material meets its specified alloy grade, identifying unknown materials, investigating material-related failures, and qualifying new suppliers.

Knowing the exact chemical composition of your material is often the first step in understanding why a part performed—or failed to perform—as expected.

What is SEM/EDX Analysis?

Scanning Electron Microscopy (SEM) with Energy Dispersive X-ray (EDX) analysis provides high-magnification imaging and elemental identification of surfaces and fractures. SEM reveals fine details that optical microscopy cannot, such as fracture surface morphology, micro-crack propagation paths, and inclusion identification.

EDX provides elemental mapping of the area being examined, which is valuable for identifying contaminants, corrosion products, coating composition, and material anomalies. This is a key tool in our failure analysis investigations.

What is Spot Testing for Black Oxidized Parts?

Spot testing is a quick chemical test used to assess the quality, consistency, and presence of a black oxide coating on ferrous parts. It verifies that the coating has been properly applied, confirms uniform coverage, and provides a simple pass/fail indication of coating integrity.

This is particularly useful for quality control on production batches, incoming inspection of black oxidized components, and verifying that post-processing steps (such as polishing) have not removed the coating.

How Do You Ensure Accurate Results?

Accurate results start with proper sample preparation—sectioning, mounting, grinding, and polishing must be done correctly to avoid artifacts that could misrepresent the material’s true condition. All of our testing equipment is calibrated and maintained to applicable ASTM standards.

Our lab is staffed by experienced technicians and a registered Professional Engineer whose skills are essential for conducting tests, interpreting results, and providing meaningful conclusions. We follow standardized testing procedures to ensure consistency and repeatability across all projects.

Because each project is handled by a single technician from quote to report, there is direct accountability for the quality of every result we deliver.

What is Failure Analysis and How Can I Benefit From It?

Failure analysis is a systematic process used to identify the root cause of material, component, or system failures. The goal is to understand why a failure occurred, prevent it from happening again, and improve overall reliability.

Using stereomicroscopy, hardness mapping, microstructural evaluation, chemical composition analysis, and SEM/EDX analysis, we identify fracture mechanisms (ductile vs. brittle), fatigue crack initiation and propagation paths, material defects such as inclusions, voids, and microstructural anomalies, evidence of overload, overheating, manufacturing defects, or service-related errors, and heat treatment anomalies contributing to failure.

If you are dealing with fractured parts, premature wear, components that don’t last as long as expected, corroded parts, or parts with visual defects such as segregation, cracks, or porosity—failure analysis can save you significant time, money, and headaches. Our evidence-based reports provide clear conclusions and actionable recommendations to help you correct process flaws, refine designs, improve material selection, and prevent repeat failures.

How Long Does Testing Take?

Our average turnaround time is approximately 2 days. We typically quote 3–5 days depending on the complexity and scope of the analysis. For clients with urgent needs, we offer priority options that can accelerate the process. Because your project is handled by a single technician from start to finish, communication is direct and turnaround is fast.

How Much Does It Cost?

We offer competitive pricing tailored to your specific needs, with a low minimum fee of just $120.00. Our pricing accommodates projects of all sizes, from a single hardness test to a comprehensive failure analysis investigation. Because we keep overhead low with our single-technician model, we pass those savings on to you. Contact our team or visit our Request A Quote page for a detailed quote.

How Do I Get Started?

Getting started is simple. Contact our team to outline your analytical requirements. You’ll be connected directly with the technician who will handle your project, so you can discuss your needs and expectations from day one. You can also visit our Request A Quote page to submit your project details directly.

Whether you need a single hardness test, a full metallographic evaluation, or a comprehensive failure analysis, our commitment to precision and customer service ensures a smooth experience from initial contact to final report.

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