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What is LN of 316LN stainless steel refers to?

Updated: 10/23/2022
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Venkangoud

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14y ago

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Grade 316 is the standard molybdenum-bearing grade, second in importance to 304 amongst theaustenitic stainless steels. The molybdenum gives 316 better overall corrosion resistant properties than Grade 304, particularly higher resistance to pitting and crevice corrosion in chloride environments.

Grade 316L, the low carbon version of 316, is immune from sensitisation (grain boundary carbide precipitation). Thus it is extensively used in heavy gauge welded components (over about 6mm). There is commonly no appreciable price difference between 316 and 316L stainless steel.

The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures.

Compared to chromium-nickel austenitic stainless steels, 316L stainless steel offers higher creep, stress to rupture and tensile strength at elevated temperatures.

EnduraMet(R) 316LN stainless is a nitrogen-strengthened version of Type 316L stainless. By means of solid solution strengthening, the nitrogen provides significantly higher yield and tensile strength as annealed than Type 316L without adversely affecting ductility, corrosion resistance or non-magnetic properties. In the hot rolled unannealed condition, yield strength of 75 ksi (518 MPa) or higher can be achieved for bar diameters up to 1.375in (34.925mm).

The foregoing information was gathered from two different web locations arrived at by searching for "stainless steel rebar" and "316LN stainless steel."

It appears that Type 316 is a standard stainless steel, 316L is a low carbon stainless steel, and 316LN is a low carbon nitrogen strengthened stainless steel.

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