Super Duplex Steel UNS S32750 Pipes

S32750, a duplex stainless steel variety, is used in heat exchangers and cold showers and devices that are resistant to seawater, high temperature and concentrated nitric acid in oil refining, fertilizer, papermaking, petroleum, chemical and other industries.

standard:ASTM

Surface :1. Galvanized 2. Black and Color Painting

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introduction

What is duplex stainless steel material
Duplex Stainless Steel (DSS) is a stainless steel material with two basic organizational structures, namely ferrite (Ferrite) and austenite (Austenite). These two phases usually account for about 50% each, while the remaining components are mainly composed of other elements.

S32750 steel pipe is a ferritic (duplex) stainless steel that combines many beneficial properties of ferritic steel and austenitic steel. Since the steel has high chromium and molybdenum content, it has good resistance points. Corrosion, crevice corrosion and uniform corrosion capabilities. The dual-phase microstructure ensures that the steel has high resistance to stress corrosion cracking and high mechanical strength.

S32750 applications and features:
S32750 duplex stainless steel pipe is used in the oil and gas industry; offshore Shipotian oil platform (heat exchange pipes, water treatment and water supply systems, fire protection systems, sprinkler systems, warm water systems; petrochemical equipment; seawater desalination (desalination) equipment (and High-pressure pipelines in equipment); mechanical and institutional components require both high strength and high corrosion resistance; combustion (exhaust gas) gas purification equipment is a steel type with good local corrosion resistance among duplex stainless steels, and is characterized by pitting corrosion resistance very good.

Technical Data

Chemical Composition of UNS S32750 Super Duplex Steel Pipes

Elements	C	Cr	Cu	Fe	Mo.	Mn	N	Ni	P	S	Si	W
Minimum	-	24.0	-	REMAINDER	3.00	-	0.24	6.00	-	-	0.20	0.50
Maximum	0.030	26	0.50	-	5.00	1.20	0.32	8.00	0.035	0.020	0.80	1.00

Mechanical Properties of UNS S32750 Super Duplex Stainless Steel Pipes and Tubes

0.2% Proof Stress (N/mm2 ) [ksi] minimum	550[79.8]
Ultimate Tensile Strength (N/mm2) [ksi] minimum	800 [116]
Elongation (%) minimum	25
Hardness (HBN)	270 max
Reduction of Cross Section Area (%)	45
Charpy V-notch Impact at ambient Temp (J) [ft.lb]	80min [59min]
Charpy V-notch Impact at -46°C (J) [ft.lb]	45av, 35min [33av, 25.8min]

Additional Testing
ASTM G48A corrosion test at 40°C	No pitting and weight loss <4.0g/m2
Ultrasonic Testing	According to ASTM A388
Ferrite Content	35%-55%
Microstructure	Microstructure certified free from grain boundary carbides, sigma, chi and laves phases

company advantage

Gnee Steel Pipe Co., Ltd. is an industrial and trading company. We mainly produce and operate carbon steel pipes and alloy steel pipes. Our pipes include stainless steel pipes, hydraulic strut pipes, and bearing pipes.

FAQ
1.Q.How do we trust your company?
A. We specialist in steel business for many years, authenticated by SGS,welcome to visit our factory.
2.Q.Do you provide custom made Products service?
A: Yes if you have your own design , we can produce according to your specification and drawing.
3.Q. How can I learn about your quality assurance?
A.Visiting our factory is the best way to understand each other.