Differences Between SUS304 And SUS316

- Apr 07, 2020-

300 series stainless steel introduction

Stainless steel is classified into five categories according to its metallic structure: 

austenitic stainless steel, ferritic stainless steel, austenitic-ferritic (duplex) stainless steel, 

martensitic stainless steel, and precipitation hardening stainless steel. 


There is a large amount of circulation in the market for the production of building components, 

decorative parts, vehicle structures, guardrails, household appliances components and housings, kiosks, telephone booths, catering appliances, medical appliances, etc. 


The stainless steel is mainly austenitic stainless steel. 


In addition to a large number of industrial applications, 

the output (or consumption) of austenitic stainless steel accounts 

for approximately 75% to 80% of the total output (or consumption) of stainless steel.


Difference

SUS304, as a widely used steel, has good corrosion resistance, heat resistance, 

low-temperature strength, and mechanical properties; stamping, bending and another hot workability, no heat treatment hardening (non-magnetic, the use of temperature -196 °C ~ 800 °C). 

Uses medical equipment, building materials, chemicals, marine parts, auto parts food industry, household products (tableware, cabinets, indoor pipes, water heaters, bathtubs, etc.), agriculture.


SUS316 stainless steel contains Mo, which has better corrosion resistance in the working condition of high-temperature than stainless steel 304 stainless steel does. 

Therefore, in high-temperature environments, engineers generally use 316 materials.

SUS316 is mainly to reduce Cr content and increase Ni content and increase Mo2%~3%. 

Therefore, its corrosion resistance is stronger than that of 304. 


It is suitable for use in chemical, seawater, and other environments. 

Similarly, the cost of 316 is also higher than 304. 

Generally, 316 is used in the place where it is relatively high, instead of 304.

      

In a summary

The utility of the naked eye can not see the difference between stainless steel 304 and 316, 

there is an intuitive method of identification, using stainless steel syrup to identify.


Differences between SUS304 and SUS316


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