The API Corrosion and Materials Professional (exam code API-571) is the exam you pass to earn the Corrosion and Materials Professional certification, a credential at the Professional level. It is also connected with related credentials such as API 510 Pressure Vessel Inspector, API 570 Piping Inspector, API 653 Aboveground Storage Tank Inspector. If you are mapping out a certification path with API, this exam is a milestone worth planning around.

The API-571 exam includes 110 (100 scored, 10 unscored pretest) questions, and you have 195 minutes to complete them. With that many questions on the clock, pacing is part of the challenge: divide your time into rough blocks as you go, and flag the items that stall you so you can circle back at the end instead of burning minutes on a single question. A week or two before your exam date, sit at least one full timed session in the Lead2PassExam test engine under the same time limit, so the pace feels familiar rather than frantic on the day.

You need 70% / Scaled score determined by API to pass the API-571 exam, and the official registration fee is $440 USD. That fee is due again in full for every retake, which makes thorough preparation the cheaper investment by far. Before you book your seat, test yourself with the Lead2PassExam practice questions until you are scoring comfortably above the passing mark on a consistent basis — it is the simplest way to avoid paying for the same exam twice.

Hold current API 510, 570 or 653 certification; or meet education + experience requirements: BS/BS in engineering/tech + 1 year, 2-year degree + 2 years, high school + 3 years industry experience (past 10 years)

Eligibility rules can be adjusted by API over time, so before you register, confirm the current requirements on the official exam page: view the official API-571 exam information.

You can book the API-571 exam through the official registration channels below:

• API ICP Portal
• Prometric Scheduling

How the exam is taken: Computer-based testing (CBT) at Prometric test centers; online proctored option available.

API lists the following official training options for candidates preparing for this exam:

• API RP 571 Damage Mechanisms Standard

Once you have worked through the training, measure your readiness with the 151 practice questions from Lead2PassExam — they show you exactly which topics still need attention before you book the exam.

Yes. Lead2PassExam offers a free PDF demo of the API-571 practice questions, so you can judge the quality of the material firsthand before paying anything. Every purchase also includes 365 days of free updates — if API changes the exam during that year, your material changes with it. And when the free update period expires, you can extend it at a 50% discount from within your member zone.

Every API-571 purchase at Lead2PassExam is backed by a 100% Money Back Guarantee: if you take the corresponding exam within 60 days of your purchase and do not pass, you can apply for a full refund. The guarantee has clear conditions — it does not apply if you sit the exam within 3 days of purchase, if you downloaded the material but never actually took the exam, or to free materials and expired orders, and the candidate name must match the payer name. To file a claim, send a scan of your exam enrollment slip together with your official Score Report PDF within 2 days of the exam; claims are processed within 7 days. If you would rather not take a refund, you can exchange the product instead and receive two additional exam preparation products of equal value for free, while your original product keeps its update service. Delivery itself is instant: your material is available for download right after payment and is also sent to your email within one minute — if it has not arrived within 2 hours, contact our customer service. There is no limit on how many computers you can install it on.

The official API Corrosion and Materials Professional outline divides the exam content into 6 main domains. The first three are:

• Other Damage Mechanisms — 15%
• Environmentally Assisted Cracking — 25%
• High-Temperature Corrosion and Degradation — 15%

That is only the headline view — scroll back up to the Exam Topics section on this page for the complete domain-by-domain breakdown before you plan your study schedule.