Stainless Steel Type 316
| |
Type 316 is a molybdenum bearing grade. This addition gives
this grade better overall corrosion resistance properties than
Types 301 and 304. In addition, this type also has a higher
creep strength at elevated temperatures. Type 316 gives useful
service at room temperature in sulphuric acid of concentration
lower than 15% and higher than 85%. It also resists chloride
attack and is often selected for use in marine atmospheres.
Type 316L with its .03 maximum carbon content is used in applications
where it is not possible to anneal after welding and where maximum
corrosion resistance is required.
|
Typical
Chemistry (% Maximum unless shown as a range)
| |
C
|
Mn
|
P
|
S
|
Si
|
Cr
|
Ni
|
Mo
|
| 316 |
0.08 |
2.0 |
.045 |
.030 |
1.0 |
16.0 to
18.0 |
10.0 to
14.0 |
2.0 to
3.0 |
| 316L |
.3 |
2.0 |
.045 |
.030 |
1.0 |
16.0 to
18.0 |
10.0 to
14.0 |
2.0 to
3.0 |
|
Typical
Applications
| The list of applications for this grade includes: |
- Pulp & paper equipment
- Heat exchangers
- Dyeing equipment
- Photographic developing
|
- Propeller shafts
- Fittings
- Exterior architectural components in marine coastal equipment
areas
|
Corrosion Resistance
Good resistance to a wider range of chemicals than Type 304. Highly
resistant to the complex sulphur compounds used in pulp and paper processing.
Also resists attack of marine and corrosive industrial atmospheres.
Heat Resistance
Good oxidation resistance in intermittent service to 1600° F and
in continuous service to 1700° F. Continuous use of 316 in 800 -
1575° F range not recommended but often performs well in temperatures
fluctuating above and below this range. Type 316L is more resistant
to carbide precipitation and can be used in the above temperature range.
Heat Treatment
Annealing-heat to 1850 - 2050° F and cool rapidly. These grades
cannot be hardened by thermal treatment.
Welding
Good characteristics suited to all standard methods. use Type 316C,
316L or 309Cb filler rods or electrodes depending on application. Welded
sections in Type 316 require post-weld annealing for maximum corrosion
resistance. This is not required if Type 316L is used.
Typical Mechanical Properties
(Annealed)
Yield
Strength .2% Offset
(PSI) |
Ultimate Strength
(PSI) |
Elongation (% in 2")
|
Hardness
(RB) |
Hardness
(BHN) |
Impact IZOD
(ft/lbs) |
Modulus of Elasticity
in Tension
(PSI) |
| 42000 |
84000 |
50 |
80 |
149 |
110 |
28.0
x 106 |
