Super Duplex Stainless Steel Pipe ASTM A790 Uns S32750 4" Sch 40s China Wholesale

• After-sales Service: 24 Hours Online
• Warranty: 1 Year
• Type: Stainless Steel Pipes
• Technique: Cold Rolling, Hot Rolling, Welding, Seamless
• Material: Uns S31803 Uns S32205 Uns S32750
• Surface Treatment: Pickling and Anealing Sand Rolling Polishe
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
• Section Shape: Round
• Features: Corrosion Resistance, High Strength, High Temperat
• Product Name: Duplex Stainless Steel Pipe
• Size: 1/2"-48"
• Color: Mill Finished / Polish
• ISO: Quality Management System Certificate
• Property: Excellent
• Transport Package: According to Customer Requirements
• Specification: OD 6mm-1000mm
• Trademark: FLK
• Origin: Wenzhou, Zhejiang, China
• HS Code: 7304419000
• Production Capacity: 5000000pieces/Year

Product Description

Product Description

The specification you mentioned, "Super Duplex Stainless Steel Pipe ASTM A790 Uns S32750 4" Sch 40s," refers to a specific type of stainless steel pipe characterized by its high strength, excellent corrosion resistance, and the ability to withstand environments where chloride stress corrosion cracking might occur. Here's a breakdown of the components of this specification:

1. Super Duplex Stainless Steel: This is a high-performance duplex stainless steel with a mixed microstructure of austenite and ferrite (50/50) which has higher strength and better corrosion resistance compared to regular duplex steels.

2. ASTM A790: This is the standard specification for seamless and welded ferritic/austenitic stainless steel pipe. The specification covers grades of duplex materials for general corrosive service.

3. UNS S32750: This is the Unified Numbering System designation for a high-alloy super duplex stainless steel. It is characterized by higher contents of chromium, molybdenum, and nickel compared to standard duplex steels, which confer higher resistance to corrosion and greater strength.

4. 4" Sch 40s: This dimension indicates the pipe size and schedule. "4 inch" refers to the nominal diameter of the pipe. "Sch 40s" (Schedule 40s) specifies the wall thickness, which in this context is a standard thickness that provides a good balance between strength and weight.

This type of pipe is typically used in applications such as oil and gas industry operations, desalination plants, and in systems where high chloride levels are prevalent, due to its excellent corrosion resistance and strength properties.

Model NO.	duplex stainless steel	Surface Treatment	Polished
Shapes	Round, Square, Rectangular, Oval	Thickness	0.01-50mm
Outer Diameter	5mm-4500mm	Length	5800mm, 6000mm, or as Required
Edges	Mill Edges, Silt Edges	Trade Terms	EXW, Fob, CFR, CIF
Specification	Support Customization	Transport Package	According to Customer Needs
Origin	China	200 Series	201, 202, 202cu, 204cu
Production Capacity	50000piecs/Year	300 Series	303, 310, 316/L/H/Ti
400 Series	409, 410, 416, 420, 430, 431	Inspection and Test Reports	En 10204 3.1, Mill Test Certificates, Chemical Rep

Dual-phase stainless steel is an extremely corrosion-resistant material, exhibiting high resistance even in chloride and sulfide environments. The basic concept lies in achieving a balanced mixture of austenite and ferrite through chemical composition design. Dual-phase stainless steel tubes typically consist of a 50% ferrite and 50% austenite phase structure, granting them superior performance. Super dual-phase pipelines combine the characteristics of ferritic and austenitic steels, offering high strength. ASTM A790 S31803/S32205 dual-phase stainless steel is a highly corrosion-resistant and work-hardening alloy, with a microstructure comprised of a mixture of austenite and ferrite. Seamless dual-phase stainless steel pipes exhibit good mechanical properties and can be used in welded conditions, considered superior. Dual-phase stainless steel pipes are easy to weld and shape, similar to austenitic grades, being alloys of chromium, nickel, and molybdenum. Overall, dual-phase stainless steel is a highly corrosion-resistant and superior-performing material suitable for use in various industrial sectors.

Product & Application

 

Stainless steel pipe is a kind of hollow long round steel, which is mainly widely used in industrial transportation pipelines and mechanical structural components such as petroleum, chemical industry, medical treatment, food, light industry, mechanical instrumentation, etc. In addition, when the bending and torsional strength are the same, the weight is lighter, so it is also widely used in manufacturing mechanical parts and engineering.