The effects on pitting corrosion resistance of alloying with for instance molybdenum or nitrogen have been investigated, but the picture is not yet completely clear. In the case of alloying with molybdenum improved metal passivation has been found. When pitting attack occurs the molybdenum assists in repairing the passive layer so that pit nucleation is stopped. According to one theory molybdate ions are formed from dissolved molybdenum. The molybdate ions then remain at the outer surface of the diffusion layer so that it becomes cation selective. The aggressive anions, such as chlorides, are thereby prevented from reaching the surface. At the interface between the oxide and the diffusion layer anion selectivity prevails so that oxide growth can continue. After the initiation of attack increased amounts of molybdate ions have also been detected in pitted areas.
The effects of molybdenum seems to be enhanced by nitrogen which influences the molybdate concentrations at the surface. This has been explained by the production of ammonium ions which increases the pH which, in turn, makes the formation of molybdate ions more likely. Surface analysis has also proved that iron dissolution is increased with increased nitrogen amounts, whereas the dissolution of chromium and molybdenum decreases. In alloys with increased nitrogen amounts the passive films have been found to contain higher ratios of chromium in the outer layer. Below this exists a thin layer enriched in nitrogen, nickel and molybdenum.
Yet another theory states that the effect of molybdenum is to block active sites (steps) at the surface. This blocking reduces the amount of aggressive chloride ions at active sites, and thereby increases the resistance to chloride attack.
Source: http://www.sandvik.com
SS316, SS304, and SS316L are all types of stainless steel. SS316 is known for its increased corrosion resistance compared to SS304, particularly in high chloride environments. SS316L is a low carbon version of SS316, which helps prevent sensitization and subsequent corrosion.
SS316 is a corrosion-resistant austenitic stainless steel with higher chromium and nickel content, suitable for use in high-temperature and chemical environments. SS416 is a martensitic stainless steel with added sulfur for improved machinability, commonly used in applications requiring moderate corrosion resistance and high strength. The main difference lies in their composition and intended applications.
SS 316L, the low carbon version of SS 316 and is immune from sensitisation (grain boundary carbide precipitation).SS 316H, with its higher carbon content has application at elevated temperatures, same as SS 316Ti which is a Titanium stabilised grade .SS 316N is nitrogen enhanced with greater strength than SS 316
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.
The specific heat of iron is 25 J/mol.K.
SS316, SS304, and SS316L are all types of stainless steel. SS316 is known for its increased corrosion resistance compared to SS304, particularly in high chloride environments. SS316L is a low carbon version of SS316, which helps prevent sensitization and subsequent corrosion.
SS316 is a corrosion-resistant austenitic stainless steel with higher chromium and nickel content, suitable for use in high-temperature and chemical environments. SS416 is a martensitic stainless steel with added sulfur for improved machinability, commonly used in applications requiring moderate corrosion resistance and high strength. The main difference lies in their composition and intended applications.
ASTM SS304, SS316, SS316L, and more chorimium content is their have more corrision resistance.
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 SS 410 is basically martenstic stainless steel which are more susceptible to hydrogen diffusivities, result in embrittlement Thus, SS 316 have better corrosion resistance than SS 410 material
Stainless Steel 316, a type of stainless steel
SS 316L, the low carbon version of SS 316 and is immune from sensitisation (grain boundary carbide precipitation).SS 316H, with its higher carbon content has application at elevated temperatures, same as SS 316Ti which is a Titanium stabilised grade .SS 316N is nitrogen enhanced with greater strength than SS 316
rS.300 PER KG
what the difference between ss316 and ss316l
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.
SS316 rockwell B is 95 maxSA-105 rockwell B is 91 max
Impossible to do with 316 stainless steel! Try a 400 series stainless such as 440.