In high-stakes industries, the structural integrity of forged components is non-negotiable. While some manufacturers label parts as “Capable of ASTM A388,” this only implies that a component could pass ultrasonic testing (UT)—not that it has been tested. For critical applications, only forgings of proven soundness are acceptable.
Ultrasonic testing per ASTM A388 is a non-destructive method that identifies internal defects such as porosity, inclusions, and cracks. However, many parts are delivered in an “as forged” condition with a rough, oxidized surface that prevents accurate testing. To allow for valid UT testing, a minimum surface finish of 250 RMS is required, as rougher surfaces weaken signal transmission and obscure defects.
All Metals & Forge Group (AMFG), an ISO 9001:2015 and AS9100D certified manufacturer, ensures every part is machined to the appropriate finish and UT tested at no extra cost. Their UT acceptance begins at a stricter threshold than ASTM A388 requires—1/8″ flat-bottom hole (FBH) equivalent—and can be tightened further upon request.
Forged parts with hidden internal flaws pose risks beyond structural failure. During CNC machining, defects can cause tool deflection, breakage, or part rejection—leading to safety hazards and costly rework.
Removing the outer scale layer before testing isn’t just about aesthetics—it prevents brittle, carbon-depleted zones and microcracks from compromising part integrity. At AMFG, nearly all parts undergo surface machining before testing to eliminate such risks.
For critical components operating under extreme stress, temperature, or corrosion, relying on theoretical capability is insufficient. Only documented proof of ultrasonic testing can ensure quality and performance.
To understand why actual UT testing—not just capability claims—can save lives, equipment, and money, read the full article now.
For more information, contact All Metals & Forge, LLC at toll-free (800) 600-9290; or visit http://www.steelforge.com.