Is 410 stainless steel food grade?

No, 410 is martensitic stainless steel, not austenitic stainless steel, and therefore, not food grade stainless steel. 304 stainless steel is austenitic stainless steel, which is food grade stainless steel.

410 stainless steel is a stainless steel grade produced in accordance with the American ASTM standard, equivalent to China's 1Cr13 stainless steel, S41000 (American AISI, ASTM). Carbon 0.15%, chromium 13%,410 stainless steel: has good corrosion resistance, machinability, general purpose blade class, valve class. 410 stainless steel heat treatment: solution treatment (℃) 800-900 slow cooling or 750 fast cooling. 410 stainless steel chemical composition: C≤0.15,Si≤1.00,Mn≤1.00,P≤0.035,S≤0.030,Cr=11.50~13.50.

Food-grade stainless steel refers to the stainless steel that meets the national GB9684 standard certification and can really contact with food without causing physical harm, GB9864 stainless steel is in line with the national GB9684 standard certification of stainless steel, so GB9864 stainless steel is food-grade stainless steel.

At the same time, the so-called 304 stainless steel is not required to pass the national GB9684 standard certification, 304 stainless steel is not equal to food grade stainless steel, 304 stainless steel is not only used in kitchenware, but also widely used in industry, the harm to the human body is unknown. At the time of purchase, the regular goods will be marked with the "food grade 304 stainless steel" mark on the surface and inner wall of the product, and the products marked "food grade - GB9684" have higher safety.