¬ AISI316
» AISI316

Definition : 

316 quality is the best known stainless steel after 304, the biggest difference is containing molybdenum (Mo). Molybdenum (Mo) 316 is better resistant to corrosion in corrosive environments than 304, it is especially good against cracks and pits in the surface and interior structure. Its shaping and welding capability is high. It can be used for various purposes in sectors such as industry, architecture, transportation. It does not require post-welding annealing for thin sections.
316L is the low carbon version of 316. Therefore, it does not require post-welding annealing for thick sections of 316L. 
316Ti contains a small amount of titanium (Ti), the ratio is around 0.5%. The greatest advantage of this quality in the other two qualities is that it has a longer strength at high temperatures. 



Chemical Composition :


Quality

 

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

316Ti

Min

-

-

-

-

-

16.5

2.00

10.5

Ti

Max

0.08

2.0

0.75

0.045

0.03

18.5

3.00

14.5

0.50

 

Corrosion Resistance :

With molybdenum addition, it has gained excellent corrosion resistance. 316 quality stainless steel has a wide area of use. Its superiority to 304 quality is being more resistant to point and crevice corrosion in warm and chloride containing environments. It can be used easily in the atmosphere, dry air, industrial atmosphere, sea water. In addition, its corrosion resistance is better in many food processing environments and places with organic chemicals. It is susceptible to stress-corrosion cracks and intergranular corrosion.



Heat Resistance :

High temperature strength was improved by the addition of molybdenum. It is resistant to high temperature oxidation up to about 1090 ° C and has good mechanical and abrasion resistance. Continuous use at temperatures between 425 and 860 ° C is not recommended; 316L quality with lower carbon content is more resistant to carbide precipitation at these temperatures. At high temperatures, 316L and 316Ti can be selected when high strength is required at the same time.



 Heat Treating (Annealing) :

Annealing is made at 1030 - 1120 ºC and 5 minutes for each thickness in mm. After annealing, it is cooled in water or air according to material thickness. Corrosion resistance is adversely affected if the color changes and scale formations on the surface after the process are not removed chemically or mechanically.



Mechanic Features :


Quality

Tensile Resistance
(MPa) min

Yielding Resistance
0.2% Proof
(MPa) min

Stretching
(% in 50mm) min

Hardness

Rockwell B 
(HR B) 
max

Brinell 
(HB) 
max

316

515

205

40

95

217

316L

485

170

40

95

217

316Ti

515

205

40

95

217

 Physical Features :



Quality

Yoğunluk
(kg/m3)

Coefficient of Elasticity
(GPa)

Coefficient of thermal expansion :
(µm/m/°C)

Thermal Conductivity
(W/m.K)

Specific Heat 0-100°C
(J/kg.K)

Electricity resistance
(ohm)

0-100°C

0-315°C

0-538°C

At 100°C

At 500°C

316/L/Ti

8000

193

15.9

16.2

17.5

16.3

21.5

500

740

 

Areas of Use :

Food equipment with high acidic amount
Laboratory benches and equipment, medical equipment
The exterior facades of the architectural structures (panel, rail, etc.)
Boat and ship fittings
Chemical transport containers
Exchangers
Bolts, nuts, screws, etc.
Spring