IIW IWE study guide
IIW IWE · Work through your exam, one topic at a time.
The IIW International Welding Engineer (IWE) diploma is a professional qualification for engineers who take responsibility for welding as a special process: process selection, procedure and qualification work, design review, metallurgical decisions, quality management and inspection strategy. It is aimed at mechanical, materials, manufacturing and structural engineers who already work with welded fabrication and want a recognised, internationally portable credential. The IIW IWE study guide has 9 sections and about 2,718 words.
01Welding processes and equipment
This domain examines how fusion processes are chosen, how power sources behave and how equipment ratings constrain real welding. The IWE candidate is expected to reason from arc physics and duty cycle to process suitability, not merely list process acronyms.
302 words, about 2 min02Materials and their behaviour during welding
This domain tests how base materials respond to the welding thermal cycle: softening, hardening, distortion, sensitisation and loss of toughness. The exam wants cause-and-effect reasoning from peak temperature and cooling rate.
323 words, about 2 min03Construction and design
This domain covers joint design, static strength of welded connections, fatigue and brittle fracture. The exam tests whether you can size a weld correctly and choose the right design philosophy, not just read a weld symbol.
315 words, about 2 min04Fabrication, applications engineering and quality management
This domain connects design to shop-floor execution: fit-up, sequencing, distortion control, procedure adherence and productivity. The exam asks for practical decisions supported by numbers, from arc time to operating factor.
286 words, about 1 min05Welding metallurgy and weldability
This domain tests solidification, phase transformation and cracking mechanisms, and the use of quantitative weldability tools. The candidate must connect composition and procedure to cracking risk with defensible numbers.
306 words, about 2 min06Weld inspection, testing and non-destructive examination
This domain covers method selection, capability and limitation of NDE, plus acceptance against standards. The exam expects you to know why a method detects a given defect, not just its acronym.
306 words, about 2 min07Health, safety and environmental protection
This domain examines hazard identification, exposure control and legal duties around welding. The IWE is expected to design work so that hazards are eliminated or controlled at source, and to justify controls with exposure reasoning.
312 words, about 2 min08Quality assurance, standards and certification
This domain covers the management system and certification framework around welding: ISO 9001, ISO 3834, ISO 14731, EN 1090-2, personnel and procedure qualification, and material certification. The exam tests correct application of the standard hierarchy.
279 words, about 1 min09Engineering practice, project work and technical reporting
This domain tests professional practice: planning welding work, controlling change, estimating cost and reporting with traceable evidence. The exam favours structured reasoning over general project language.
289 words, about 1 min