Mar 7 2013
Topics Covered
Introduction
Chemical Composition
Mechanical properties
Applications
Introduction
Stainless steel 333 is a high chromium nickel base alloy with excellent resistance to carburization and high temperature oxidation. It has an exceptional ability to withstand the repeated thermal shock of water or oil quenching. It is one of the few stainless steel alloys that can resist polythionic acid stress corrosion cracking and dew point corrosion by sulfuric acid.
Chemical Composition
The chemical composition of Grade 333 stainless steel is outlined in the following table.
|
Element |
Content (%) |
|
Nickel, Ni |
44 – 47 |
|
Chromium, Cr |
24 - 27 |
|
Molybdenum, Mo |
2.5 – 4 |
|
Cobalt, Co |
2.5 – 4 |
|
Tungsten, W |
2.5-4 |
|
Manganese, Mn |
2 |
|
Silicon, Si |
0.75 |
|
Carbon, C |
0.08 |
|
Sulfur, S |
0.03 |
|
Phosphorous, P |
0.03 |
|
Iron, Fe |
Balance |
Mechanical properties
The mechanical properties of Grade 333 stainless steel are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
738 MPa |
107000 psi |
|
Yield strength |
324 MPa |
47000 psi |
|
Elongation at break |
48% |
48% |
Applications
The following are some of the major applications of Grade 333 stainless steel:
-
Radiant tubes, muffles, retorts
-
Boilers
-
Gas turbine combustion chambers
-
Sour water stripper reboiler lining
-
Thermowells
-
Molten glass process equipment
-
Tube hangers for petroleum refining and power generation
-
Carburizing furnace fixtures
-
Calciner shells