Stainless steel grade 439

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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.