本帖最後由 kwliu 於 2026-4-19 20:17 編輯
有一對叉羹好神奇,手柄零磁(打Mark SUS316),叉羹位弱磁(即放入口果段),但細看又看不到接囗.........
但 ...
ghost2377 發表於 2026-4-19 18:52 
Cold-rolled austenitic stainless steel (like 304 or 316) becomes magnetic due to strain-induced martensite transformation. While annealed austenite is non-magnetic, heavy deformation from cold rolling, drawing, or bending reorganizes the crystal structure at a microscopic level, creating magnetic martensite, particularly at surface edges
Is Stainless Steel Magnetic? Magnetism Explained |