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F55, S32760, 1.4501 Super Duplex Stainless Steel- TJC STEEL.

12/23/2020

 
​F55 is a kind of super duplex stainless steel, superior to the 2205 in overall performance."Super" refers to the high alloying of its components. Compared with other duplex stainless steels, the high alloying of super duplex steels mainly [TJC STEEL]refers to high molybdenum and nitrogen.

National Standard
CHINA GB/T 20878-2007 022Cr25Ni7Mo4WCuN
GB/T 21833-2008 S27603
GB/T 31303-2014 [TJC STEEL]
AMERICA ASTM A182-2006 F55,S32760
GEMANY DIN EN 10088-1:2005 X2CrNiMoCuWN25-7-4
1.4501

Component Specification (%)
GRADE S27603* F55* 1.4501
C ≤0.030 ≤0.030 ≤0.030
Si ≤1.00 ≤1.00 ≤1.00
Mn ≤1.00 ≤1.00 ≤1.00
P ≤0.030 ≤0.030 ≤0.035
S ≤0.010 ≤0.010 ≤0.015
Cr 24.00~26.00 24.00~26.00 24.00~26.00
Ni 6.00~8.00 6.00~8.00 6.00~8.00
Mo 3.00~4.00 3.00~4.00 3.00~4.00
W 0.50~1.00 0.50~1.00 0.50~1.00
Cu 0.50~1.00 0.50~1.00 0.50~1.00
N 0.20~0.30[TJC STEEL] 0.20~0.30 0.20~0.30

* : PREN = % Cr Mo + 16 x % N + 3.3 x % of 40 or higher
Commercial Brand
Rolled Alloys Zeron 100
Industeel UR2507W
Nippon Yakin NAS 75N
BÖHLER A911SA
Sandvik SAF 32760™
Mannesmann DMV 25.7 N

Characteristics Performance 
(1) Excellent resistance to stress corrosion cracking, excellent resistance to pitting and crevice corrosion, resistance to various inorganic acids and organic acids, excellent resistance to non-oxidizing acid corrosion, strong alkali [TJC STEEL]corrosion.
(2) good weldability, excellent mechanical properties, can reduce the weight of the structure, with design advantages.
(3) In the working temperature above 300℃ for a long time service, the toughness of the material will decline significantly.
❒ applications
F55 has been included in the specification for metal materials and ASME boilers and pressure vessels resistant to sulphide stress [TJC STEEL]cracking for NACE MR 0175 oil field equipment. Its applicable temperature is below 315 ° C. Its main applications include: submarine pipelines, flue gas desulfurization, osmotic desalination equipment, sulfuric acid plants, and fasteners for Marine engineering.

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