ASTM A790 Marine S32750 Super Duplex Steel Pipe

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Materials:
TP316/L
Certificates:
ISO, PED
Outer diameter:
DN8-DN450
Package:
woven bag or as per customer’s
Price Term:
FOB/CFR/CIF，etc
Payment :
T/T, L/C or as negotiation

Product Description

ASTM A790 Marine S32750 Super Duplex Steel Pipe

Super Duplex Steel Pipe Specification:

Outer Diameter	13.7-457.2mm
Wall Thickness	2.11--23.83mm
NPS	1/4"-18"
Schedule	10/10S,40/40S,80/80S
Material Grade	S32750,S32760
Standard	ASTM A790
Application	Used in Fluid and Gas Transport, Structure and Machining,etc
Certificates	ISO9001:2015, PED
Process Method	Cold Drawn/ Cold Rolled
Surface Finish	Pickling annealed
Package	Woven bags

Chemical Composition：

UNS Designation	C	Si	Mn	P	S	Cr	Ni	Mo	N	Cu
	max	max	max	max	max
S31803	0.03	1	2	0.03	0.02	21.0 - 23.0	4.5 - 6.5	2.5 - 3.5	0.08 - 0.20	-
2205
S32205	0.03	1	2	0.03	0.02	22.0 - 23.0	4.5 - 6.5	3.0 - 3.5	0.14 - 0.20	-
S32750	0.03	0.8	1.2	0.035	0.02	24.0 - 26.0	6.0 - 8.0	3.0 - 5.0	0.24 - 0.32	0.5 max
2507
S32760	0.05	1	1	0.03	0.01	24.0 - 26.0	6.0 - 8.0	3.0 - 4.0	0.20 - 0.30	0.50 -1.00

Duplex steel seamless pipe and austenitic seamless pipe are two different types of stainless steel pipe, the main differences are as follows:

Material organization is different:

Austenitic stainless steel pipe is organized in an austenitic structure, usually containing high chromium (about 18%) and nickel (8-10%), as well as low carbon content (to 0.1%).

Duplex stainless steel tube, on the other hand, has a combination of austenitic and ferritic organizations, and its properties include both the corrosion resistance of austenitic stainless steel, and the high strength and resistance to stress corrosion cracking of ferritic stainless steel.

Chemical composition:

The chemical composition of austenitic stainless steel is mainly chromium and nickel, while duplex stainless steel adds more elements, such as molybdenum and nitrogen, to improve its corrosion resistance and mechanical properties.

Performance characteristics:

Austenitic stainless steel tube usually has good plasticity, toughness, weldability and corrosion resistance, and can maintain a stable organizational structure at both high and normal temperatures.

Duplex stainless steel tube is due to its special dual organization, with high strength and good corrosion resistance, especially the ability to resist stress corrosion cracking is stronger.

Application areas:

Austenitic stainless steel tubes are suitable for environments requiring good corrosion resistance and weldability, such as food processing, chemical and petroleum industries.

Duplex stainless steel tubes are more suitable for working conditions subject to high strength and corrosive environments, such as marine equipment, chemical and petrochemical equipment.