- Advanced Plastic and Material Testing, Inc.
 - Providing metal, plastics and materials testing, polymer analysis, circuit boards, failure analysis and more. - American Engineering Testing, Inc.
- Geotechnical, environmental and construction materials service firm. With locations in Duluth, MN; Mankato, MN; Marshall, MN; Rochester, MN; St. Paul, MN; and Wausau, WI.
- Analysts, Inc.
- Services include ferrography, spectrochemical analysis, physical properties, and other ASTM testing techniques.
- Analytical ChemTech International, Inc.
- Specialising in diagnostic and preventative maintenance testing of electrical insulating materials.
- Anderson Materials Evaluation
- Offers analytical services for the characterization of applied materials, including metals, polymers, inorganics, semiconductors, composites and more.
- Bess Testlab, Inc.
- Provides material and metallurgical failure analysis, welder certification, GPR (rebar, cable location), corrosion, physical and chemical analysis, and non-destructive inspection.
- Bodycote Materials Testing Limited
- Providing independent materials testing services. Also offering services from to various industries from aerospace to drug companies.
- Cal~Rite
- Calibration and field repair services of materials testing equipment.
- CAS-MI Laboratories
- Materials testing, failure analysis, deformulation ,and more for the paints, coatings, adhesives, and polymer industries.
- CC Technologies
- Engineering, research, and testing firm specialising in corrosion, corrosion control, and materials evaluation. Also designs and develops testing instrumentation and software.
- Chemir/Polytech Laboratories, Inc.
- Chemical research laboratory performing materials identification and testing, reverse engineering, and polymer analysis. Also provides expert witnesses for litigation support involving product liability.
- Columbus Metallurgical Services
- A materials testing and analysis laboratory based in Columbus, Ohio.
- Construction Testing, Inc.
- Independent commercial laboratory specialising in testing and inspection of concrete, soil, and structural steel.
- Corvib Canada Limited
- Maker of the Equotip Hardness Tester. Also consults on vibration analysis, monitoring and balancing.
- Delsen Testing Laboratories, Inc
- Independent testing laboratory specialising in characterization of engineering materials.
- Durability, Inc.
- Specialised in design/characterization and testing of composite/engineering materials and structures, as well as chemical analysis and testing.
- e-Rust Corrosion Prediction Services
- Offers a virtual corrosion lab service for determining corrosion rates of metals and alloys in contact with customised solution composition, temperature, and pressure.
- Eddy Current Technology Incorporated
- Manufactures eddy current equipment for heat exchanger tube inspection.
- Electrolurgy Inc.
- Offers metal finishing services - including anodizing, plating, and painting - and non-destructive testing.
- Engel Metallurgical, Ltd.
- Provides failure analysis, serves as expert witness, researches and tests materials and products.
- Environment Associates
- Sales and rentals of used and reconditioned environmental simulation test chambers and vibration equipment for qualification and reliability tests.
- ETC Laboratories
- Independent accredited product testing laboratory. Providing certification testing, performance evaluation, R/D, competitive analysis, durability studies, and safety testing.
- Fatigue Technology, Inc.
- Manufacturer of split sleeve cold expansion tools to increase the fatigue life of holes, bushings, and fasteners in metal structures. Serving the aircraft and aerospace industries.
- Fitzsimmons and Associates, Inc.
- Chemical analytical laboratory providing services to industries for material ID (polymers, adhesives, contaminants, etc.) and problem solving for their quality control.
- Herguth Laboratories
- Petroleum testing, tribology, wear, oil analysis, diesel, fuels, training, radiology, 10CFR50, quality assured, ASTM, ISO9000, spectroscopy, inspection, SKF condition monitoring laboratory.
- Hocking
- Eddy current non destructive testing (NDT) equipment, theory and related matters.
- Inspectorate
- Provides inspection, testing, and analysis of commodities worldwide, including metals and minerals, oil and petrochemicals, and agriculture products.
- Integra Technologies
- Offers various testing services including ESD, Latch-Up, HBM, CDM, DSCC, Burn-In, HAST, HTOL, and MM testing.
- Integrex Testing Systems
- Independent provider of comprehensive evaluation services for materials, products, and systems.
- Ithaca Materials Research and Testing
- Providing mechanical testing, chemical and failure analysis, machining, polymer analysis, and environmental simulation testing.
- J.E.I. Metallurgical, Inc.
- Specialises in metallurgical failure analysis, accident investigation, product liability/reliability and litigation consulting.
- Laboratory Testing Inc.
- Materials testing, nondestructive testing, specimen machining, failure analysis, and calibration services laboratory accredited to ISO/IEC 17025.
- Lambda Research
- Accredited independent laboratory, specialising in x-ray diffraction methods of materials testing.
- Magnetest
- Offers testing equipment for electrical steel utilized in motors and transformers.
- Magnetic Inspection Laboratory, Inc.
- Offers metallurgical testing, nondestructive testing, environmental testing, coatings, metal finishing and welding services.
- Matco Associates
- Independent consulting engineering firm specialising in failure analysis, materials testing, selection/design, and corrosion investigations.
- Materials Testing Solutions (MTS)
- Provider of materials testing and sensing solutions. MTS works with clients to optimise their designs, improve their productivity, and bring better products to market faster.
- Matrix Composites, Inc.
- Develops, manufactures, and tests advanced composite structures, specialises in precision rtm of aircraft, aerospace, and optical structures.
- MEI-Charlton, Inc.
- Professional engineers and scientists supported by fully equipped metallurgical, mechanical, and chemistry laboratories.
 Metals Technology Testing Ltd.
- Offering metals testing, including chemical analysis, metallography, and NDT.- Michigan Metrology
- Provider of advanced 3D surface texture measurement and analysis in fields including: automotive, biomedical, coatings, machining, electronics, and optics.
- NH Materials Laboratory, Inc.
- Laboratory for materials testing, metallurgical testing, failure analysis, and chemical analysis.
- Northern Analytical Laboratory, Inc
- Specialising in trace element analysis material testing services using glow discharge and inductively coupled plasma mass spectrometry.
- Northwest Laboratories, Inc.
- Services include forensics, metallurgy, chemistry, physical testing, and product testing.
- NSL Analytical Services, Inc
- Provides both materials and environmental testing services.
- Pensacola Testing Laboratories, Inc.
- Provides materials testing, geotechnical engineering, drilling, and non-destructive testing services to municipal, commercial, and industrial clients.
- Pittsburgh Materials Technology
- Provides materials development, fabrication, testing, and characterization for high temperature alloys and metallic and non-metallic composites.
- Poulson Vacuum Services
- Design and manufacture custom, fully automated leak test systems for the manufacturing industries.
- Precision Laboratories UK
- Offers a wide range of chemical testing strips and indicators.
- Precision Testing Labs
- Independent testing facility specialising in footwear, textiles and consumer products. We serve business and industry fulfilling quality control, research and vendor consistency functions.
- Professional Engineering and Inspection Company, Inc. [PEICO]
- Provides engineering, inspection, and materials testing services.
- Qualitest International Inc.
- Offers test instruments for quality control, including tensile/compression machines, fatigue and impact testers, durometers, and more.
- QUEST Integrated, Inc.
- Non-destructive testing equipment and services. Electro-optic systems and inspection.
- Reinhart & Associates, Inc.
- Nondestructive evaluation specialists and consultants.
- Sherry Laboratories
- Metallurgical materials & environmental testing services.
- Smith-Emery Company
- Provides construction testing and inspection services and related sampling/testing services, including: geotechnical, environmental, hazardous waste, window wall, flatness testing, etc.
- Stork Materials Technology
- Integrated network of independently operating materials testing laboratories located in North America and Europe.
- Sub-Tropical Testing Service
- Specialising in outdoor and accelerated material exposure testing (weathering).
- TCR Engineering Services
- India-based NABL & ISO 17025 accredited laboratory performing mechanical testing, chemical analysis, pmi, ndt, failure, corrosion, inspection, research, and consulting.
- Touchstone Research Laboratory
- Research, engineering, consulting, and testing laboratory specialising in failure analysis, corrosion, alloy development, composites, chemical analysis, impact, and fatigue.
- Transfire Services Limited
- Provides fire and materials testing services for the rail transport and other industries.
- Twining Laboratories of Southern California, Inc.
- Construction inspection, materials testing, and engineering consultation firm.
- VTEC Laboratories Inc.
- Materials testing and research laboratory specialising in fire, flammability, and combustion toxicity.
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