| 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 |
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 |
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 |
