Grade AISI 316 Stainless Steel, SS 316 Properties, SS316 Composition

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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.

Heat Treatment

  • 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.

Corrosion Resistance

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.

SS 304 316 stainless steel corrosion resistance chart in chloride medium

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 % (≤)
ASTMUNSAISICSiMnPSCrNiMoNNotes (Product)
A240/A240MS316003160.080.752.000.0450.03016.0-18.010.0-14.02.00-3.000.10Plate, Sheet, and Strip
A276/A276MS316003160.081.002.000.0450.03016.0-18.010.0-14.02.00-3.00Bars 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
ASTMUNSAISITensile Strength (MPa) ≥Yield Strength  ≥ (MPa) at 0.2% OffsetElongation (%, ≥50mm)Brinell Hardness (HBW) ≤Rockwell Hardness (HRBW)  ≤Notes
A240/A240MS316003165152054021795Plate, 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
USAEuropeanGermanyBritain (UK)FranceISOJapanChinaAustraliaIndiaRusiaKorea
StandardGrade (UNS)StandardGrade (Steel Number)StandardGrade (Steel Number)StandardGrade (Steel Number)StandardGrade (Steel Number)StandardGrade (ISO Number)StandardGradeStandardGradeStandardGradeStandardGradeStandardGradeStandardGrade
AISI
ASTM
316
(S31600)
EN 10088-1X5CrNiMo17-12-2 (1.4401)DIN EN 10088-1;
DIN 17440
X5CrNiMo17-12-2 (1.4401)DIN EN 10088-1;
BS970 :1996
X5CrNi18-10 (1.4301);
316S16
NF EN 10088-1;X5CrNiMo17-12-2 (1.4401)ISO 15510X5CrNiMo17-12-2 (4401-316-00-1)JIS G4304SUS316GB/T 20878;
GB/T 1220;
GB/T 3280
06Cr17Ni12Mo2;
0Cr17Ni12Mo2 (Old designation)
31604Cr17Ni12Mo208X17H13M2TSTS316

 

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