Stainless steel grade 439 is capable of being made into complex shapes such as tubular manifolds and exhaust system components, where temperatures tend to go beyond the oxidation limit of grade 409 steel. It is also preferred where wet corrosion resistance especially to chlorides is needed.
Stainless steel grade 439 has good weldability, brightness, and pitting corrosion resistance. It polishes well, and is good for deep drawing.
The following datasheet provides an overview of stainless steel grade 439.
Chemical Composition
The chemical composition of grade 439 stainless steel is outlined in the following table.
|
Element |
Content (%) |
|
Iron, Fe |
81.35 |
|
Chromium, Cr |
17.35 |
|
Silicon, Si |
0.35 |
|
Titanium, Ti |
0.335 |
|
Manganese, Mn |
0.25 |
|
Nickel, Ni |
0.2 |
|
Molybdenum, Mo |
0.1 |
|
Niobium, Nb (columbium, Cb) |
0.02 |
|
Phosphorous, P |
0.02 |
|
Nitrogen, N |
0.01 |
|
Carbon, C |
0.01 |
|
Sulfur, S |
0.002 |
Mechanical Properties
The mechanical properties of grade 439 stainless steel are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength (annealed) |
438 MPa |
63500 psi |
|
Yield strength (annealed/ @strain 0.200 %) |
263 MPa |
38100 psi |
|
Modulus of elasticity |
GPa |
ksi |
|
Poisson�s ratio |
0.270 - 0.290 |
0.270 - 0.290 |
|
Elongation at break (In 2", 50% cold worked) |
2.80% |
2.80% |
|
Hardness, Rockwell B (annealed) |
72.9 |
72.9 |
Other Designations
Equivalent material to grade 439 stainless steel is DIN 1.4510.
Applications
Stainless steel grade 439 is applied in areas that require oxidation and corrosion resistance. It is also widely used in catering equipment.