Casting & Forging Flaws

Sonaspection have developed a series of small and lightweight specimens which contain typical flaws found in cast and forged components.

The specimens are designed for practical training to provide experience in flaw detection, sizing and interpretation. Customised specimens are available on request.

The specimens provide

  • Basic flaw detection and sizing
  • Representative geometries
  • An awareness of reporting difficulties

Specimens to choose from

  • Flange Blank, Ingot & Ingot Blank
  • Stud
  • Wasted Bolt
  • Tee Blank
  • 4 Spigot Blanks
  • Recessed Flange
  • Tapered Ingot Blank

Sonaspection casting and forgings are available either individually or in sets.

Individual specimens

  • Contain up to 3 flaws
  • Are unique – no two specimens are the same
  • Are individually numbered and supplied with:
    • Drawing/NDE report
    • Testing and acceptance criteria
    • Certificate of conformance

Recommended set contains

  • 12 individual specimens
  • An average of 20 flaws
  • Total weight of 59Kg (130 lbs)


  • Ultrasonic testing
  • Magnetic particle testing
  • Penetrant testing
Example for wasted bolt


Flawed forging specimens

UT/MT/PT individual specimens
Part No. Specimen Type Specimen Type Dimensions Weight
001 Flange (IMG) 250mm diameter x 20mm thick 7kg / 15.5lbs
002 Ingot (IMG) 50mm diameter x 200mm long 3.1kg / 6.8lbs
003 Ingot (IMG) 100mm diameter x 50mm thick 3kg / 6.6lbs
004 Stud (IMG) 20mm diameter x 120mm long
Head – 50mm diameter x
Thread Length – 30mm
0.6kg / 1.3lbs
005 Wasted Bolt (IMG) 36mm diameter x 150mm long
Thread length – 25mm
0.85kg / 1.9lbs
006 Tee (IMG) 100mm x 150mm x 10mm 2.2kg / 4.9lbs
007 Spigot (IMG) 100mm diameter x 75mm diameter
150mm long
7.1kg / 15.6lbs
008 Spigot (IMG) 150mm diameter x 50 diameter
55mm long
4.5kg / 10lbs
009 Spigot (IMG) 50mm diameter x 40mm diameter
100mm long
1.2kg / 2.6lbs
010 Spigot (IMG) 75mm diameter x 50mm diameter
150mm long
3.75kg / 8.3lbs
011 Recessed Flange (IMG) 200mm diameter x 40mm thick
Recess – 100mm diameter x 10mm deep
9.15kg / 20lbs
012 Tapered Ingot (IMG) 200mm diameter x 175mm diameter x 75mm thick 16.55kg / 36.5lbs