The difference between SS304 and SS316 is that SS316 contains molybdenum.
304 is a low carbon modification of 302 SST (which is the general purpose austenitic or 18-8 SST) for restriction of carbide precipitation during welding. 304L is a lower carbon modification of 304 for further restriction of carbide precipitation during welding. Max carbon in 304 is 0.08 versus 0.15 in 302 and 0.03 in 304L. 316 is more corrosion resistant than 302 and 304, with higher creep strength, primarily due to the higher Nickel content. 316L is again primarily used for welded construction. 316 has the same carbon content as 304 and 316L as 304L. 302 304 304L 316 316L Cr 17/19 18/20 18/20 16/18 16/18 Ni 8/10 8/12 8/12 10/14 10/14 C max 0.15 0.08 0.03 0.08 0.03 Mn max 2.0 2.0 2.0 2.0 2.0 Si max 1.0 1.0 1.0 1.0 1.0 P max .045 .045 .045 .045 .045 S max .03 .03 .03 .03 .03 Other - - - Mo 2.0/3.0 316L can be used in place of 316 in all applications but the reverse is not true. 316L should be used for welded structures requiring high corrosion resistance. 316L is more expensive than 316 in most regions of the world.
SS 321 contains titanium which makes it more corrosion resistant than SS 304. SS 321 is better suited for high temperature applications due to its improved resistance to intergranular corrosion. SS 304 is a general-purpose stainless steel with good overall corrosion resistance but not as high as SS 321.
ASTM SS304, SS316, SS316L, and more chorimium content is their have more corrision resistance.
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1.Stainless steel 304:SS304 will be available for using indoor, far away from rivers, lakes and oceans.or somewhere doesn't rain too much outdoor all the year round.?or it will be easy to be rusty if it closes to the rivers, oceans.or the climate is railing too much outside.2.Stainless steel 316:SS316 can be used outdoor completely, even close to the oceans and will not be rusty at all.
http://www.calfinewire.com/metals/tds/ss304.htm7.93 gm/cm³
304 is a low carbon modification of 302 SST (which is the general purpose austenitic or 18-8 SST) for restriction of carbide precipitation during welding. 304L is a lower carbon modification of 304 for further restriction of carbide precipitation during welding. Max carbon in 304 is 0.08 versus 0.15 in 302 and 0.03 in 304L. 316 is more corrosion resistant than 302 and 304, with higher creep strength, primarily due to the higher Nickel content. 316L is again primarily used for welded construction. 316 has the same carbon content as 304 and 316L as 304L. 302 304 304L 316 316L Cr 17/19 18/20 18/20 16/18 16/18 Ni 8/10 8/12 8/12 10/14 10/14 C max 0.15 0.08 0.03 0.08 0.03 Mn max 2.0 2.0 2.0 2.0 2.0 Si max 1.0 1.0 1.0 1.0 1.0 P max .045 .045 .045 .045 .045 S max .03 .03 .03 .03 .03 Other - - - Mo 2.0/3.0 316L can be used in place of 316 in all applications but the reverse is not true. 316L should be used for welded structures requiring high corrosion resistance. 316L is more expensive than 316 in most regions of the world.
ss304 component drilling process suitable fixture material
SS304 contains 18% chromium and 8% nickel. SS316 contains 16% chromium, 10% nickel and 2% molybdenum. The "moly" is added to help resist corrosion to chlorides (like sea water and de-icing salts) .
The ultimate strength of annealed SS304 is 80,000 psi (550 MPa). Its yield strength is 30,000 psi, and its shears strength is 80000/(SQRT(3)) = 46000 psi. If it is cold worked, as for bolts, its yield and ultimate and shear strength will increase.
They're both good, but consider going with SS 316.
SS 321 contains titanium which makes it more corrosion resistant than SS 304. SS 321 is better suited for high temperature applications due to its improved resistance to intergranular corrosion. SS 304 is a general-purpose stainless steel with good overall corrosion resistance but not as high as SS 321.
The cost in March 2012 will be approximately 4.8 $ to 5.2 $ per KG for one sheet of 8'x4' size. Price in India.
When welding SS410 to SS304 stainless steel plates, a suitable filler metal is typically an ER308 or ER308L stainless steel wire. This filler provides good corrosion resistance and compatibility with the austenitic structure of SS304 while allowing for the martensitic nature of SS410. It's important to consider preheating and post-weld heat treatment to prevent cracking and ensure the integrity of the weld.