Which material choice became common for kettle bodies due to better handling of thermal stress?
Answer
Metal bodies, often stainless steel.
The shift in materials was crucial for longevity and safety as performance increased. While early models experimented with materials such as glass or ceramic for the vessel body, metal bodies, most frequently constructed from stainless steel, became standard. This change occurred because metal provides superior structural integrity, better handles the intense and repeated thermal stress generated during high-speed boiling cycles, and offers a sturdier housing for the internal electrical components.
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