Material Analysis
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ASA environmental stress cracking assessment missing
Problem Phenomenon
ASA products crack in batches in specific chemical environments, environmental stress cracking assessment was not done at the material selection stage, and post-remediation costs are high.
Cause Analysis
Although ASA has better environmental stress cracking resistance than PC, it is still sensitive to specific solvents and hydrocarbons; material selection relied only on general chemical resistance tables without actual medium immersion verification; stress level and medium jointly determine cracking time.
Solution
①Perform immersion stress cracking tests with actual contact media at the material selection stage; ②solidify low-stress process for products; ③establish a prohibited chemical list and train the site; ④perform medium traceability analysis on cracked parts.
Key Takeaway
The environmental stress cracking risk of ASA must be assessed by actual testing; general data from chemical resistance tables cannot replace working condition verification; on-site chemical management is a long-term line of defense.
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