Is the 4 10 stainless steel spoon poisonous? Is the 4 10 stainless steel spoon poisonous?

1 and 4 10 stainless steel spoons are not poisonous. 4 10 stainless steel is food grade. 4 10 stainless steel is a stainless steel brand produced according to American ASTM standard, which is equivalent to China's 1Cr 13 stainless steel and S4 1000 (American AISI, ASTM). 0. 15% carbon, 13% chromium and 4 10 stainless steel have good corrosion resistance and machinability.

The American Iron and Steel Association uses three numbers to represent various standard grades of malleable stainless steel. These include:

(1) Austenitic stainless steel is marked with 200 and 300 series numbers. For example, some common austenitic stainless steels are marked with 20 1, 304, 3 16, 3 10.

(2) Ferritic and martensitic stainless steels are represented by 400 series numbers.

(3) ferritic stainless steel is marked with 430 and 446, and martensitic stainless steel is marked with 4 10, 420 and 440C.

(4) Duplex (austenite-ferrite), stainless steel, precipitation hardening stainless steel and high alloy with iron content less than 50% are usually named by patent names or trademarks.