AISI 316 Introduction
AISI 316 stainless steel is an austenitic stainless steel. Due to the addition of Mo element, it has a great improvement in corrosion resistance and high temperature strength. It can withstand high temperatures up to 1200-1300 degrees and can be used under harsh conditions.
The main uses are heat exchangers for pulp and paper equipment, dyeing equipment, film processing equipment, pipes, and materials for exterior use in coastal areas. Also used in the field of solenoid valves, mainly used for housings, clamps, spheres, valve bodies, valve seats, nuts, valve stems, etc.
SS 316 Physical Properties
- Density of stainless steel 316: 8.03g/cm3
- Melting point of stainless steel 316: 1370℃-1398℃
- Specific heat capacity: 502J/(Kg.K) at 20℃
- Electrical resistivity: 0.74 Ω·mm2·m-1 (20℃);
- Thermal conductivity of stainless steel 316:
- 12.1 (20 ℃);
- 16.3 (100 ℃);
- 21.4 (500 ℃).
- Coefficient of thermal expansion
- 16.0 (20-100℃), linear;
- 16.8 (20-200℃), linear;
- 17.5 (20-300℃), linear;
- 18.1 (20-400℃), linear.
SS316 Heat Resistance
SS316 has good oxidation resistance in intermittent use below 871 °C and continuous use above 927 °C. In the range of 427 °C – 857 °C, it is better not to continuously use SS 316, but when 316 stainless steel is continuously used outside this temperature range, it has good heat resistance. 316L stainless steel has better carbide precipitation resistance than AISI 316 and can be used in the above temperature range.
- Solution Treatment (Annealing): Annealing at a temperature range of 1010-1065 °C, then cooling rapidly.
- Homogenization treatment: about 1250℃.
The stainless steel surface should be carefully cleaned prior to annealing and must be protected with vacuum, hydrogen or inert gas in order to prevent the formation of an oxide layer during the annealing process.
SS316 cannot be hardened by heat treatment, but can be hardened by cold rolling.
AISI 316 has better corrosion resistance than 304 stainless steel and has good corrosion resistance in the production of pulp and paper. Moreover, 316 stainless steel is also resistant to erosion by marine and aggressive industrial atmospheres.
The following is the application range of 316 stainless steel corrosion resistance chart in chloride ion media for reference.
SS316 Data Sheet
SS 316 Chemical Composition
The composition of ss 316 chemical composition is given in table 1.
Table-1, 316 stainless steel composition
|SS316 Chemical Composition % (≤)|
|A240/A240M||S31600||316||0.08||0.75||2.00||0.045||0.030||16.0-18.0||10.0-14.0||2.00-3.00||0.10||Plate, Sheet, and Strip|
|A276/A276M||S31600||316||0.08||1.00||2.00||0.045||0.030||16.0-18.0||10.0-14.0||2.00-3.00||Bars and Shapes|
SS 316 Stainless Steel Mechanical Properties
The following table shows the yield strength, tensile strength, elongation and hardness of AISI 316.
Table-2, SS 316 properties
|SS316 Mechanical Properties|
|ASTM||UNS||AISI||Tensile Strength (MPa) ≥||Yield Strength ≥ (MPa) at 0.2% Offset||Elongation (%, ≥50mm)||Brinell Hardness (HBW) ≤||Rockwell Hardness (HRBW) ≤||Notes|
|A240/A240M||S31600||316||515||205||40||217||95||Plate, Sheet, and Strip|
AISI 316 Equivalent
ASTM type 316 stainless steel equivalent to ISO, European EN, Germany DIN, British BSi, France NF, Japanese JIS and Chinese GB standard (For reference).
Table-3, type 316 stainless steel equivalent chart
|AISI 316 equivalent|
|Standard||Grade (UNS)||Standard||Grade (Steel Number)||Standard||Grade (Steel Number)||Standard||Grade (Steel Number)||Standard||Grade (Steel Number)||Standard||Grade (ISO Number)||Standard||Grade||Standard||Grade||Standard||Grade||Standard||Grade||Standard||Grade||Standard||Grade|
|EN 10088-1||X5CrNiMo17-12-2 (1.4401)||DIN EN 10088-1;|
|X5CrNiMo17-12-2 (1.4401)||DIN EN 10088-1;|
|NF EN 10088-1;||X5CrNiMo17-12-2 (1.4401)||ISO 15510||X5CrNiMo17-12-2 (4401-316-00-1)||JIS G4304||SUS316||GB/T 20878;|
0Cr17Ni12Mo2 (Old designation)