Material Analysis
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Environmental Stress Cracking of acrylonitrile-butadiene-styrene copolymer Products
Problem Phenomenon
The product cracks when contacting specific chemical media while simultaneously bearing stress.
Cause Analysis
（1）The product has residual stress, which accelerates cracking under the action of chemical media
（2）Contact with incompatible chemical media (solvents, greases, etc.)
（3）The product wall thickness is uneven, and the stress concentration parts are easy to crack
（4）The material molecular weight is low, and the environmental stress cracking resistance is poor
（5）The service environment temperature is high, accelerating cracking
Solution
（1）Reduce the residual stress of the product (annealing treatment)
（2）Avoid contact with incompatible chemical media
（3）Optimize the product design with uniform wall thickness to reduce stress concentration
（4）Select a high-molecular-weight grade
（5）Reduce the service environment temperature
Key Takeaway
Environmental stress cracking is the result of the combined action of stress and chemical media.
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