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Stainless steel 316,316L,316H
Stainless steel 316,316L,316H
Stainless steel 316,316L,316H
Stainless steel 316,316L,316H

Stainless steel 316,316L,316H

316 is the standard molybdenum-bearing grade, second in importance to 304 amongst the austenitic stainless steels. The molybdenum gives 316 better overall corrosion resistant properties than 304, particularly higher resistance to pitting and crevice corrosion in chloride environments.
Product introduction
316 is the standard molybdenum-bearing grade, second in importance to 304 amongst the austenitic stainless steels. The molybdenum gives 316 better overall corrosion resistant properties than 304, particularly higher resistance to pitting and crevice corrosion in chloride environments. It has excellent forming and welding characteristics. It is readily brake or roll formed into a variety of parts for applications in the industrial, architectural, and transportation fields. 316 also has outstanding welding characteristics. Post-weld annealing is not required when welding thin sections.
316L, the low carbon version of 316 and is immune from sensitisation (grain boundary carbide precipitation). Thus it is extensively used in heavy gauge welded components (over about 6mm).
316H, with its higher carbon content has application at elevated temperatures, as does stabilised grade 316Ti.
The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures.
Technical data
Chemical Composition
Grade   C Mn Si P S Cr Mo Ni N
316 Min - - - 0 - 16.0 2.00 10.0 -
Max 0.08 2.0 0.75 0.045 0.03 18.0 3.00 14.0 0.10
316L Min - - - - - 16.0 2.00 10.0 -
Max 0.03 2.0 0.75 0.045 0.03 18.0 3.00 14.0 0.10
316H Min 0.04 0.04 0 - - 16.0 2.00 10.0 -
max 0.10 0.10 0.75 0.045 0.03 18.0 3.00 14.0 -

Mechanical Properties
Grade Tensile Str (MPa) min Yield Str 0.2% Proof (MPa) min Elong (% in 50 mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
316 515 205 40 95 217
316L 485 170 40 95 217
316H 515 205 40 95 217
Note: 316H also has a requirement for a grain size of ASTM no. 7 or coarser.

Physical Properties
Grade Density(kg/m3) Elastic Modulus (GPa) Mean Co-eff of Thermal Expansion (µm/m/°C) Thermal Conductivity (W/m.K) Specific Heat 0-100 °C (J/kg.K) Elec Resistivity (nΩ.m)
0-100 °C 0-315 °C 0-538 °C At 100 °C At 500 °C
316/L/H 8000 193 15.9 16.2 17.5 16.3 21.5 500 740

Grade Specification Comparison
Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
316 S31600 316S31 58H, 58J 1.4401 X5CrNiMo17-12-2 2347 SUS 316
316L S31603 316S11 - 1.4404 X2CrNiMo17-12-2 2348 SUS 316L
316H S31609 316S51 - - - - -
Note: These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.

Possible Alternative Grades
Grade Why it might be chosen instead of 316?
316Ti Better resistance to temperatures of around 600-900 °C is needed.
316N Higher strength than standard 316.
317L Higher resistance to chlorides than 316L, but with similar resistance to stress corrosion cracking.
904L Much higher resistance to chlorides at elevated temperatures, with good formability
2205 Much higher resistance to chlorides at elevated temperatures, and higher strength than 316
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