Origin	China
Model Number	0001
Brand Name	GSS
Steel Grade	32750
Type	Seamless
D:6-325mm*WT:1-40mm	ASTM/ASME A789 ASTM/ASME

Super Duplex Stainless Steel is a highly alloyed, good performance Duplex steel with a pitting resistance. Super Duplex offers good resistance to pitting and crevice corrosion. Super Duplex is suited for use in aggressive environments. Super Duplex Stainless has good resistance to stress corrosion cracking in chloride and sour environments. Super Duplex has good resistance to erosion corrosion and corrosion fatigue

TYPICAL ANALYSIS
C.	Cr.	Cu.	Mn.	Mo.	N.	Ni.	P.	S.	Si.	W.
0.03%	24.00-	0.50-	1.00%	3.00-	0.20-	6.00-	0.035%	0.015%	1.00%	0.50-
max	26.00%	1.00%	max	4.00%	0.30%	8.00%	max	max	max	1.00%

Typical Mechanical Properties
Tensile Strength N/mm2	730 - 930 MPa
0.2% Proof Stress N/mm2	530 MPa
Elongation	25%
Hardness (Brinell)	290 HB

The first-generation duplex stainless steels were developed more than 70 years ago in Sweden for use in the sulfite paper industry. Called duplex because of its mixed microstructure with about equal proportions of ferrite and austenite, duplex stainless steels are a family of grades, which range in corrosion performance depending on their alloy content. The term Super Duplex was first used in the 1980s to denote highly alloyed, high-performance "super" duplex steel with a pitting resistance.

BENEFITS OF SUPER DUPLEX STAINLESS STEEL

• High strength,
• High resistance to pitting, crevice corrosion resistance.
• High resistance to stress corrosion cracking, corrosion fatigue and erosion
• Excellent resistance to chloride stress-corrosion cracking
• High thermal conductivity
• Low coefficient of thermal expansion
• Good sulfide stress corrosion resistance,
• Low thermal expansion and higher heat conductivity than austenitic steels,
• Good workability and weldability,
• High energy absorption

SUPER DUPLEX APPLICATIONS

• Heat exchangers, tubes and pipes for production and handling of gas and oil,
• Heat exchangers and pipes in desalination plants,
• Mechanical and structural components,
• Power industry FGD systems,
• Pipes in process industries handling solutions containing chlorides,
• Utility and industrial systems, rotors, fans, shafts and press rolls where the high corrosion fatigue strength can be utilized,
• Cargo tanks, vessels, piping and welding consumables for chemical tankers.
• High-strength, highly resistant wiring。