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SANDVIK DUPLEX STAINLESS
STEELS
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SAF 2507 / SAF 2205
/ SAF 2304
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SAF 2507
sandvik SAF 2507 is high-alloy
super dupiex stinless steel for service under extremely corrosive conditions.
It is developed mainly for chloride containing environments like seawater
and therefore, it contains high amounts of chromium, molybdenum and nitrogen.
SAF 2205
Sandvik SAF 2205 is a medium-alloy
duplex stainless steel with high corrosion resistance.
This steel is the most widely used of the three. Continual development
work for many years has lead to increased nitrogen and molybdenum contents,
thus further improving the weldability and corrosion resestance.
SAF 2304
Sandvik SAF 2304 is a low-alloy
duplex stainless steel. It contains no molybdunum and has lower nickel
content than the other two. It is developed as a hihg-strength and low-cost
alternative to the standard austenitic grades 304L and 316L.
CHEMICAL
COMPOSITION (WEIGHT-%)
|
Grade
|
Cr
|
Ni
|
Mo
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N
|
C Max
|
Si Max
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Mn Max
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P Max
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S Max
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SAF 2507
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25
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7
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4
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0.3
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0.030
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0.8
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1.2
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0.035
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0.015
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SAF 2205
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22
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5
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3.2
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0.18
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0.030
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1.0
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2.0
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0.030
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0.015
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SAF 2304
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23
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4.5
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-
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0.1
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0.030
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1.0
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2.0
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0.035
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0.015
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TYPE
OF STEEL
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SANDVIK
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UNS
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EN*
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W-Nr
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DIN
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AFNOR
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SS
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SAF 2507
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S32750
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1.4410
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-
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X2CrNiMoN25 7 4
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-
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2328
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SAF 2205
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S31803/S32205
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1.4462
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1.4462
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X2CrNiMON22 5 3
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Z2CND 22-05-03
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2377
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SAF 2304
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S32304
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1.4362
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1.4362
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X2CrNiM23 4
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Z2CN 23-04AZ
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2327
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★Valid for sheet / plate, strip, semi-finished products, bars, rodsand
sections for general purposes (not for pressure purposes)
PRODUCT STANDARDS
|
Grade
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seamless and welded tube and pipe
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Flanges
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Fittings
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plate, sheet and strip
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Bar
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forgins
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SAF 2507
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ASTM A789 /A790
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ASTM A182
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ASTM A182
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ASTM A240 / EN 10088-2
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ASTM A479 / EN 10088-3
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ASTM A182
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SAF 2205
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ASTM A 789 / A790 /NF A49-217
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ASTM A182
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ASTM A182 /A815
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ASTM A240 / EN 10088-2
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ASTM A276 / A479/ EN10088-3
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ASTM A182
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SAF 2304
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ASTM A789 / A790
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-
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-
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EN10088-2
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EN 10088-3
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-
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Minimun values for walll thicknesses
<20 mm
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SANDVIK
Grade
|
Proof
strength
R
MPa
min
|
Tensile
strength
Rm
MPa
|
Elongation
A
%
min
|
Hardness
Vickers
average
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SAF 2507
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550
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800~1000
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25
|
290
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SAF 2205
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450
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680~880
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25
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260
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SAF 2304
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400
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600~820
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25
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230
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