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Specialty Metals That Make Our World TM

Stainless Steel - Superferritic

Superferritic Stainless Steels have a structure and properties similar to the common ferritic alloys, but they contain enhanced levels of chromium and molybdenum to increase their resistance to high temperatures and corrosive environments such as seawater.


Stainless Steel - Superferritic
Alloy
(UNS Designation)
End Use Composition
nominal wt%
Specifications Density
lb/in3 (g/cm3)
Tensile
Strength
ksi. (MPa)
0.2% Yield
Strength
ksi. (MPa)
Elong-
ation %
Hardness
AL 29-4C®
S44735
Welded condenser tubing used in seawater and other applications requiring extreme resistance to chloride pitting, crevice corrosion and stress corrosion cracking C 0.03 max, Mn 1.0 max, P 0.04 max, S 0.03 max, Si 1.0 max, Cr 28.0-30.0, Ni 1.0 max, Mo 3.6-4.2, N 0.045 max, (Ti+Cb) 0.2-1.0, (Ti+Cb) 6x(C+N) min, Fe Balance ASTM A240 0.277
(7.67)
80 min
(550 min)
60 min
(415 min)
18 min 25 Rockwell C max

E-BRITE ®
S44627
Solenoid valves, Pressure vessels, Coker components, Heat exchangers, Air preheaters, Heat recuperators C 0.01 max, Mn 0.4 max, Si 0.4 max, Cr 25.0-27.5, Ni 0.5 max, Mo 0.75-1.5, N 0.015 max, Cu 0.2 max, Cb 0.05-0.2, (Ni+Cu) 0.5 max, Fe Balance ASTM A-240 ASME SA-240 0.280
(7.76)
65 min
(450 min)
40 min
(275 min)
22 min 90 Rockwell B max


 

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