Austenitic SS 316 Flanges and Fittings
316 SS pipe fittings and 316 Stainless Steel Flanges are an Austenitic standard molybdenum-bearing grade, which is very useful stainless steel and is highly resistant to general corrosion. Austenitic SS 316 is better than the conventional nickel chromium stainless steels such as 302 and 304.
CHEMICAL COMPOSITION
|
GRADE |
Ni |
Cr |
Si |
C |
Mn |
P |
S |
Mo |
Fe |
|
|---|---|---|---|---|---|---|---|---|---|---|
SS 316 |
MIN |
10 |
16 |
– |
– |
– |
0 |
2 |
||
|
MAX |
14 |
18 |
0.75 |
0.08 |
2 |
0.045 |
0.03 |
3 |
BALANCE |
|
SS 316L |
MIN |
10 |
16 |
– |
– |
– |
– |
2 |
||
|
MAX |
14 |
18 |
0.75 |
0.03 |
2 |
0.045 |
0.03 |
3 |
BALANCE |
|
SS 316H |
MIN |
10 |
16 |
0 |
0.04 |
0.04 |
2 |
|||
|
MAX |
14 |
18 |
0.75 |
0.1 |
0.1 |
0.045 |
0.03 |
3 |
BALANCE |
The molybdenum gives SS 316 flanges and 316 SS Fittings better overall corrosion resistant properties than Grade 304, particularly higher resistance to pitting and crevice corrosion in chloride environments. The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures.
Specification of Flange
The specified ASTM Standard Specification for Wrought Austenitic 316 Stainless Steel Flanges is ASTM A182 with manufacturing standard such as ANSI/ASME B16.5, B16.48, BS4504, B 16.47 Series A & B, BS 10, EN-1092, DIN, etc
Mechanical Properties of Flange
|
Grade |
Tensile Strength |
Yield Strength |
Elongation |
Reduction of area |
|---|---|---|---|---|
|
[MPA] |
[MPA] |
(% in 50mm) min |
min % |
|
|
SS 316 |
515 |
205 |
30 |
50 |
|
SS 316H |
515 |
205 |
30 |
50 |
|
SS 316L |
485 |
170 |
30 |
50 |
According to application and uses in pipes and tubes SS 316 flanges are broadly grouped into different sort, for example, Welding Neck Flange(WNF) & Long Welding Neck Flange(LWNF), Slip-on Flange(SOF), Lap Joint Flange(LJW), Blind Flange, Socket Welding Flange (SWF), Threaded Flange(THW), Plate Flange.
SS 316 Flange for the most part has different face type, for example, Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ), blind flange, with various class rating as 50 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16,din 2.4856 , 25, 40 & ANSI B16.5.
Specification of Fittings
The Specification for Wrought Austenitic 316 Stainless Steel Fittings is ASTM A403, having Specific manufacturing Standards as ASME/ANSI B16.9, ASME B16.28, MSS-SP-43.
Mechanical Properties of Fittings
|
Grade |
Tensile Strength |
Yield Strength |
|---|---|---|
|
[MPA] |
[MPA] |
|
|
SS 316/H/L |
515 |
205 |
Stainless steel 316 pipe fittings are categorically available are Elbow, Reducer, Tee, Coupling, Bend, Stub End, Cap, Nipple, Washer, Cross, Union etc which are available in different types such as Welded, Seamless and Fabricated having thickness range from 5s, 10s, 40s, 80s, 10, 20, 40, STD, 60, 80, XS, 100, 120, 140, 160, XXS available with NACE MR 01-75
Application
UNS S31600 Flanges are used in many industries such as chemical processing equipment, rubber industry, paper & pulp industry, pollution control equipment, pharmaceutical industries and more. SS 316 is a low carbon containing variant of 316 and bears better immunity towards sensitization when compared.
PHYSICAL PROPERTIES
|
Grade |
Density (g/cm3) |
Elastic Modulus (GPa) |
Mean Co-eff of Thermal Expansion (μm/m/°C) |
Thermal Conductivity (W/m.K) |
Specific Heat ( J/Kg.K) |
Electrical Resistivity (nΩ.m) |
|||
|---|---|---|---|---|---|---|---|---|---|
|
0-100°C |
0-315°C |
0-538°C |
at 100°C |
at 500°C |
0-100°C |
||||
|
SS 316/L/H |
8 |
193 |
15.9 |
16.2 |
17.5 |
16.3 |
21.5 |
500 |
740 |
SS 316 or ASTM A 403 Pipe Fittings is utilized in number of utilizations like in pharmaceutical and sustenance preparing apparatus, careful inserts, marine outside trim, and modern hardware that hold the destructive strategy synthetic compounds that is utilized to make inks, rayon, paper, materials, blanches, elastic and photographic synthetic substances.
