Which NDT method should you certify in first?

The five methods at a glance

Method	What it finds	Where you meet it
UT (ultrasonic)	Internal flaws and wall thickness	Welds, forgings, plate, corrosion work
MT (magnetic particle)	Surface and near-surface flaws in ferromagnetic parts	Shops, fabrication, castings and forgings
PT (liquid penetrant)	Flaws open to the surface in nonmagnetic or magnetic parts	Aerospace and machined parts, welds on stainless and aluminum
RT (radiographic)	Internal flaws, shown as an image	Welds, castings, pipelines
VT (visual)	Surface conditions and weld appearance	Nearly every job, often as the first look

If you are new to the methods, read how UT, MT and PT work before you commit. Ten minutes of reading tells you which one you would enjoy doing for a whole shift.

How long each route is

ASNT publishes training and experience requirements per method for its NDT Level II program. Pulling the numbers from our requirements guide, where a day is at least 7 hours:

Method	Training days	Days in the method	Total NDT experience days
MT	3	40	76
PT	2	30	58
VT	4	30	58
UT	12	120	229
RT	12	120	229

The gap is large. PT asks for 30 days in the method and UT asks for 120. If your goal is a first credential quickly, PT, VT or MT puts you in front of the exam sooner. If your target employer posts UT or RT roles, the longer route is the one that gets you hired, and starting it early is worth more than a shortcut into a method the employer does not use.

Your employer's written practice may set its own table, so confirm which route you are on first. The ASNT vs employer certification guide explains the difference.

Match the method to the jobs you want

Work backward from postings, which is the same worksheet the jobs and career path article describes. Search for roles near you and tally the methods they name. A region with aerospace shops will lean toward PT and MT. A region with pipelines, plants and fabrication yards will lean toward UT and RT. Pay moves with method, shift and location, and the pay guide shows the BLS benchmark and posted ranges so you can compare offers fairly.

A short decision flow

1. Does your employer already use a method? Start there. They may pay for exams and give you the work log that experience days need.
2. If not, which postings near you repeat? Choose the most common method.
3. Want the fastest first credential? Pick MT or PT, then add UT while you gain experience.
4. Want the widest long-term options? Start UT early, since its experience requirement takes the longest to build.
5. Not sure? Take the free check for the method you are leaning toward and see how its topics feel.

Each method you add is a separate set of training, experience and exams, so the first choice is not a trap. It sets your starting point.

Think about the experience log early

Every method route is built on days of documented work, so the log matters as much as the exam. ASNT's requirements count days in the method and total NDT experience in separate columns, and the evidence has to be signed by someone who can vouch for it. If you are working under a supervisor now, ask them to sign off monthly instead of in a rush at the end.

This also affects which method you choose. If your current job lets you log MT days every week, MT is the route where your paperwork grows fastest, even if UT is your long-term goal. Choose the method your daily work feeds, then add the next one on purpose.

What the first exam costs and covers

ASNT lists the initial General and Specific exams at $740 for members and $820 for nonmembers per method. The General exam is 50 questions in 2 hours and the Specific is 40 questions in 2 hours. Our free checks cover the UT, MT and PT General exams, and RT and VT are not yet covered.

Since each method has its own exam, your first one also teaches you how you study best. If you pick UT, the UT study plan maps the work over weeks. If you pick MT or PT, the 2 to 4 week plan fits the shorter runway.

The free 10-question check shows exactly which areas to study first in the method you choose. Try the UT check, or go to the MT check or the PT check, and let the result confirm your pick.

FAQ

Which NDT method is the quickest to certify in?

By ASNT's published numbers, PT has the lowest requirements: 2 training days, 30 days in the method and 58 days of total NDT experience. VT is level with it on experience days, and MT is next. Your employer's written practice may set different figures.

Which method pays the most?

Pay depends on method, location, shift and employer more than on a single method label, and BLS data covers NDT as one broad occupation. The pay guide shows the benchmark and posted ranges. Compare postings for the methods near you.

Can I start with UT?

Yes. The requirements are longer, at 12 training days and 120 days of UT experience, but nothing in ASNT's published table makes another method a prerequisite. You build the experience log as you work, so start the paperwork early.

Do I need Level I first?

The requirements in our guide list training days and experience days for Level II, and they do not list a separate Level I certificate. An employer's written practice can set its own steps, so ask yours.