Food Grade Stainless Steel Guide

Food grade stainless steel refers to stainless steel materials that meet national standards and can come into direct contact with food without producing harmful substances. Among numerous stainless steel materials, 304, 316, and 430 stainless steel are widely used in the food industry due to their excellent performance.

Difference in Composition

​Stainless Steel Grade	304	316	430
Chromium (Cr) Protective layer against corrosion at high temperatures	18.5%	17.5%	18.5%
Nickel (Ni) Resistance to oxidation and corrosion	9%	10%	0%
Manganese (Mn) Improves strength, workability, and resistance to wear	2%	2%	1%
Molybdenum (Mo) Strength, hardness, hardenability, and toughness	​0%	​2.5%	0%

 

What are the physical requirements for food grade stainless steel?

Food grade stainless steel should have good corrosion resistance, mechanical properties, and processing performance. These properties ensure that stainless steel does not dissolve harmful substances during food production and use, thereby ensuring food safety and consumer health

What is the heat resistance of 304, 316, and 430 stainless steel?

Grade	Safe Continuous Service Temperature	Maximum Tolerance Temperature	High-Temperature Risk Points
304	≤600°C	800°C	>450°C - Prone to intergranular corrosion with prolonged exposure
316	≤925°C	1700°C (intermittent)	>925°C - Performance degradation
430	≤800°C	850°C (intermittent)	Prolonged high temperatures may cause embrittlement and rusting

 

Why are 304, 316, and 430 suitable for food grade?

The reason why 304, 316, and 430 stainless steel are suitable for food grade is mainly due to their corrosion resistance and safety. 430 stainless steel has excellent magnetic conductivity and is the preferred choice for making induction cookers. And 304 stainless steel is the most familiar to everyone. With a nickel content of up to 8%, it is mainly used in the food industry for pots, pans, utensils, and kettles.

 

Which type usually has a higher price?

Generally speaking, 316 stainless steel has the highest price, followed by 304 stainless steel, and finally 430 stainless steel. Of course, it may fluctuate with market conditions