Duplex Steel Pipe ATSM A790 S31200 High strength, corrosion resistant welded steel pipe
Product Discription:
S31200 steel is austenitic ferritic stainless steel, also known as duplex stainless steel. It is a new steel grade produced on the basis of SUS329JI steel by reducing the content of C and Cr and adding N. The steel has the advantages of high strength, resistance to chloride stress corrosion, weldability, etc., and is the best pitting resistance of duplex stainless steel.
Some of the characteristics of S31200 duplex stainless steel are as follows:
- Corrosion resistance: S31200 duplex stainless steel is resistant to chloride stress corrosion and has the best pitting resistance.
- Weldability: The weldability of S31200 duplex stainless steel is the same as that of 18-8 austenitic stainless steel, without preheating before welding, and generally without heat treatment after welding.
Duplex stainless steel corrosion resistant. They have strong resistance to inter-granular corrosion. Even in chloride and sulfide environments, duplex stainless steels show very high resistance to stress corrosion cracking. Duplex stainless steel work hardening alloy. Their micro-structure consists of austenitic phase and ferritic phase. Therefore, duplex stainless steel shows the characteristics of austenitic and ferritic stainless steel. This combination of properties may mean some compromise compared to pure austenite and pure ferrite.
Use of S31200 duplex stainless steel:
Because of the characteristics of S31200 duplex stainless steel, it is widely used in chemical, fertilizer, petrochemical and other industrial fields, but also used to make heat exchangers, evaporators and so on.
The components of S31200 are as follows:
| Designation | C | Mn | P | S | Si | Ni | Cr | Mo | N | Cu | Others |
| S31200 | 0.030 | 2.000 | 0.045 | 0.030 | 1.000 | 5.5-6.5 | 24.0-26.0 | 1.20-2.00 | 0.14-0.20 | | |
Tensile and Hardness Requirements about the S31200 Duplex steel pipe:
| Designation | Tensile
Strength,
min, ksi
[MPa] | Yield
Strength,
min,
ksi [MPa] | Elongation
in 2 in. or
50 mm,
min, % | Hardness, max |
| HBW | HRC |
| S31200 | 100 [690] | 65 [450] | 25 | 280 | |
About us:
Zheheng Steel is an excellent supplier of stainless steel pipes and other high quality industrial products. The pipeline range provided is manufactured according to national and international raw material quality standards. The industry is offering tubing in a variety of standards, sizes and specifications. According to customer requirements, we can provide various specifications of pipes according to customer requirements. Therefore, buyers can purchase products of different sizes, wall thicknesses, lengths, diameters, etc., according to their needs.
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ATSM A790 Duplex Steel Pipe S31200 High Strength Corrosion Resistant Welded Images
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