: Marks where two streams of molten metal failed to fuse perfectly.
For most defect types, the standard provides a series of five photographic examples, typically labeled from A to E.
– Unfused metallic supports used to hold internal cores during pouring.
Linear discontinuities, which are generally deemed unacceptable. How to Use the MSS SP-55 Standard (2025 Edition) mss sp-55 standard pdf
Surface depressions occurring during solidification.
For engineers, quality inspectors, and procurement professionals, having access to the current MSS SP-55 standard PDF is essential. It ensures that inspections are compliant with modern industry demands.
This standard is essential reading for:
– Criteria for evaluating the quality and blend profile of structural weld repairs made to the casting.
Procurement teams and inspectors can instantly reference the compliance documentation on tablets or laptops directly on the foundry floor.
To be audit-proof, you need the . Here is how to get it: : Marks where two streams of molten metal
If the defect is within the "Acceptable" photo range, the part is approved.
Inspectors compare the production casting directly against these reference photos. In some cases, tactile comparison (feeling the roughness or depth of the irregularity) is used alongside visual assessment. Why the PDF Version is Critical for Supply Chains