Type 439 (UNS S43035) Stainless Steel

Type 439 (UNS S43035) Stainless Steel

Type 439 (UNS S43035) Stainless Steel Description Type 439 is an 18% chromium, titanium stabilized ferritic stainless steel with corrosion resistance similar to that of 304/304L stainless steel. This grade may be used in the annealed, cold formed or as-welded condition in applications where...
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Type 439 (UNS S43035) Stainless Steel

Description
Type 439 is an 18% chromium, titanium stabilized ferritic stainless steel with corrosion resistance similar to that of 304/304L stainless steel. This grade may be used in the annealed, cold formed or as-welded condition in applications where other stainless steels are used. Type 439 has good weldability due to titanium stabilization and has excellent resistance to stress corrosion cracking. 


Chemical Composition (wt%) 

Element

439

Carbon

0.030

Chromium

17.0-19.0

Nickel

0.50

Manganese

1.00

Silicon

1.00

Nitrogen

0.030

Phosphorus

0.040

Sulfur

0.030

Aluminum

0.15

Titanium

0.20 +4(C+N) min
1.10 max

* Maximum, unless range is indicated


Mechanical Properties

Property

439

Yield Strength, min. (ksi)

30

Tensile Strength, min. (ksi)

60

Elongation, min. (%)

22

Hardness, max. (Rb)

89


Physical properties for Type 439 stainless steel

Property

439

Density, lb/in3

0.278

Modulus of Elasticity, psi

29.0 x 106

Coefficient of Thermal Expansion, 68-212˚F, /˚F

5.6 x 10-6

Thermal Conductivity, Btu/ft hr ˚F

14.0

Specific Heat, Btu/lb ˚F

0.11

Electrical Resistivity, Microohm-in

24.8


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