Ⅰ. 304 stainless steel pressure cooker is better or 302?
1. Different uses
304 stainless steel is a common material in stainless steel, with a density of 7.93 g/cm³, which is also called 18/8 stainless steel in the industry. High temperature resistant to 800℃, with good processing performance and high toughness, it is widely used in industry and furniture decoration industry and food and medical industry. 302 stainless steel has high strength after cold working, but the elongation is slightly worse than 1Cr17Ni7.
2. Different mechanical properties
(1) 302: yield strength MPa: ≥205, tensile strength MPa: ≥520 (hardness hb≤187), elongation/%: ≥40.
(2) 304: tensile strength σb (MPa) ≥515-1035 , Conditional yield strength σ0.2 (MPa)≥205, elongation δ5 (%)≥40, hardness ≤201HBW; ≤92HRB; ≤210HV.
3. The amount of carbon is different
302 has the same corrosion resistance as 304. Because of the relatively high carbon content, the strength is better than 304 stainless steel.
Ⅱ. 304 stainless steel pressure cooker maintenance method
Clean the 304 stainless steel pressure cooker and accessories before use. Pour cold water to half height of the pot body, seal and close the lid to heat. After the pressure limiting valve is exhausted, turn off the fire source, open the lid after cooling, pour out the water in the pot, and wipe it clean.
The parts of the pressure cooker cannot be replaced at will. Remember that the pressure cooker can only use the parts produced by the pressure cooker factory.
Do not let the pressure cooker dry.
Prevent children from approaching when using the pressure cooker.
When heating, make sure that the pot body is placed on the fire source steadily.
When moving a pressure cooker, you should lift it up steadily, handle it gently, and don't drag it.
If any abnormality of the pressure cooker is found (such as signs of damage such as bumping and deformation), stop using it immediately and send it to the pressure cooker repair service station for overhaul. Do not repair it yourself.
It is forbidden to add weight to the pressure limiting valve or to replace the pressure limiting valve with other heavy objects.
Minors should not use the pressure cooker.
The pressure cooker cannot be used for other purposes except for cooking food.