Reason Analysis for Cracking of 1Cr18Ni9Ti Stainless Steel Catheter

Cracks were found during routine inspection on 1Cr18Ni9Ti stainless steel catheters. Macro and micro observation of the crack and fracture, analysis of the composition of corrosion products, hardness testing and residual stress testing were used to analyze the failure seasons for catheter cracking. The results show that the reason for the catheter cracking failure was stress corrosion cracking.