Testing Technician at Minth North America, Inc.

• Metallographic Sample Preparation & Analysis
• Perform full-process metallographic sample preparation including cutting, mounting, grinding, polishing, and etching
• Conduct microstructural observation, grain size rating, phase content analysis, and defect identification (e.g., porosity, inclusions, cracks) using metallurgical microscopes
• Analyze weld penetration depth, heat-affected zone, and weld microstructure of welded joints
• Prepare and archive metallographic specimens; maintain metallographic sample library
• Hardness Testing
• Operate and maintain Brinell, Rockwell, Vickers, and microhardness testers to perform hardness testing on metallic materials
• Select appropriate hardness testing methods and loads based on material type and specification requirements
• Perform gradient and cross-sectional hardness testing (e.g., on welded joints, heat-treated parts)
• Record and analyze hardness data to determine material heat treatment status and process conformance
• Material Mechanical Testing
• Operate universal testing machines to perform tensile testing, obtaining ultimate tensile strength, yield strength, and elongation values
• Perform other mechanical property tests in accordance with ASTM standards
• Organize, analyze, and report test data
• Laboratory Equipment Maintenance & Quality Management
• Perform daily calibration, maintenance, and upkeep of testing equipment
• Maintain laboratory consumables inventory, including hardness test blocks, chemicals, polishing consumables, etc.
• Comply with laboratory safety procedures and 5S management requirements
• Participate in internal laboratory audits and proficiency testing
• Cross-Functional Collaboration
• Collaborate with production, process, quality, and engineering teams to support process validation and problem-solving
• Participate in failure analysis projects, providing metallographic and hardness testing support
• Support material property validation required for PPAP submissions for new projects

To qualify for this role, you must meet the following:

• Associate degree or equivalent; Bachelor's degree in Materials Science, Metallurgical Engineering, Mechanical Engineering, or related field preferred
• 2+ years of experience in automotive manufacturing or materials laboratory
• Proficient in the metallographic sample preparation process (cutting, mounting, grinding, polishing, etching); proficient in operating metallurgical microscopes
• Proficient in the operation and maintenance of Brinell, Rockwell, and Vickers hardness testers
• Basic knowledge of universal testing machines, tensile testing, and other mechanical property test methods
• Familiar with ASTM material testing standards (e.g., E3, E8, E10, E18, E92, E112, etc.)
• Proficient in Microsoft Excel, Word, and PowerPoint for data analysis and report generation
• Detail-oriented with good documentation and communication skills
• Ability to work rotating shifts and overtime; familiar with laboratory safety procedures

Key To Being Successful In This Role

• Experience in aluminum alloy material or weld metallography analysis
• Familiarity with SEM/EDS (Scanning Electron Microscopy/Energy Dispersive Spectroscopy) operation
• Experience in automotive parts industry (especially battery boxes, aluminum extrusions)
• Knowledge of ISO/IEC 17025 laboratory management systems
• Relevant NDT (Non-Destructive Testing) certifications