Subject: Update: MSS SP-55 Visual Inspection Standards for Steel Castings
The standard covers 12 types of irregularities, ranging from linear fractures (Hot Tears/Cracks) to Voids (Shrinkage/Gas Porosity), Inclusions, and surface defects like Wrinkles or Scabs. The evaluation involves comparing cast surfaces against photos depicting both acceptable and unacceptable examples of these issues. Complementary Standards MSS SP-55 acts as a visual baseline, often supporting ASTM specifications mss sp 55 pdf