Business License
Contact Us
Your inquiry content must be between 10 to 5000 characters
Please enter Your valid email address
How many types of duplex stainless steel are there
Duplex stainless steel is mainly classified into four types: low alloy type, medium alloy type, high alloy type and super duplex stainless steel type.
Low-alloy type duplex stainless steel: The alloying elements of this type of steel are mainly chromium and nickel, with relatively low contents, and the pitting resistance equivalent index (PRE) is no greater than 25. For example, the cold-rolled steel sheet material 0Cr21Ni5Ti in China belongs to this category.
Medium alloy type duplex stainless steel: Compared with low alloy type, medium alloy type duplex stainless steel adds molybdenum or copper, and the pitting resistance equivalent index (PRE) is between 25 and 35. For example, duplex stainless steel rolled material 00Cr18Ni5Mo3Si2 belongs to this category.
High-alloy duplex stainless steel: This type of steel contains a relatively high amount of chromium, nickel, as well as alloying elements such as molybdenum and copper, with a pitting resistance equivalent index (PRE) ranging from 35 to 40. For instance, 0Cr25Ni6Mo3CuN, which has been widely used in China, falls into this category.
Super duplex stainless steel: This type of steel, in addition to containing a relatively high amount of alloying elements such as chromium, nickel, molybdenum, and nitrogen, some also incorporate tungsten and copper. The pitting resistance equivalent index (PRE) is greater than 40. For instance, 00Cr25Ni7Mo3.5WCuN, which has been adopted in some industries in China, belongs to this category.
This classification of duplex stainless steel is based on the differences in their alloy composition and corrosion resistance. Each type of duplex stainless steel has its specific application fields, ranging from general industrial applications to usage in extreme environmental conditions, meeting the demands of various industries.
Recently Posted
-
Does the stainless steel welded pipe have specific temperature requirements during the solution heat
January 20, 2026Solution heat treatment involves heating stainless steel to a high temperature and then rapidly cooling it to achieve an oversatur
Read More -
Can stainless steel welded pipes be made into thick pipes
January 20, 2026With the improvement of high-quality welding technology and increasingly strict weld inspection, the application fields of s
Read More -
Three types of commonly available food-grade stainless steel on the market
January 20, 2026The common food-grade stainless steel pipes are mainly composed of iron, chromium and carbon and other elements. Household stainle
Read More -
What are the requirements for stainless steel welding pipe production equipment
January 20, 2026As is well known, stainless steel welded pipes have been widely used in various industries such as machinery, chemical engineering
Read More
Contact Us
Recommended Products
-
Stainless Steel Elbow Welded Elbow 45/90/180-degree Seamless Pressed Elbow Long Radius Elbow Short Radius Elbow WholesaleNegotiableMOQ: 1 Piece -
316L/1.4405 Seamless Stainless Steel PipeNegotiableMOQ: 2 Meters
-
310s 440 Seamless Sanitary Piping Price 321 904l 201 20 Inch Seamless Steel Pipe A554 Stainless Steel PipeNegotiableMOQ: 1 Piece
-
China Brand ZZ Wholesale 304L 316 316L Welded Austenitic Piping Stainless Steel Pipe SupplierNegotiableMOQ: 2 Meters
-
304/304L/316/409/410/904L/2205/2507/310H Premium Stainless Steel Sheets Supplier Custom Sizes & FinishesUS$ 1.72MOQ: 1 Ton
-
Stainless Steel ASME B16.9 Sch 45 90 Degree Pipe Fittings ElbowUS$ 8MOQ: 1 Piece
-
China Brand Zz 304L 316/316L GB En JIS Standard Thin Wall Welded Stainless Steel Water Pipe/TubeNegotiableMOQ: 2 Meters
-
BA 4 Inch 6 Inch 8 Inch 201 304 304L 316 316L Welded Seamless Stainless Steel PipeNegotiableMOQ: 2 Meters
-
ASME B36.19M-2004 SCH40S Stainless Steel Pipe - Complies With EU 3.1 CertificationUS$ 1 - 650MOQ: 1 Piece
-
Factory TP309/TP309S/TP309H (UNS30900) Seamless Stainless Steel Pipe and Tube for Boiler BafflesUS$ 8MOQ: 200 Kilograms
-
TP347/TP347H/1.4961/S34709 Seamless Stainless Steel Pipe for UseNegotiableMOQ: 2 Meters
-
China 304 316 Stainless Steel Sanitary Welded Tube Food Grade Sanitary Grade Welded Pipe PolishingNegotiableMOQ: 1 Piece
-
China Manufacture Stainless Steel 316L Ba Seamless Welded Steel Pipe TubesUS$ 1760 - 1860MOQ: 5 Tons
-
316L/1.4405 Seamless Stainless Steel PipeNegotiableMOQ: 2 Meters
-
Stainless Steel Globe Valve – High Durability & Corrosion ResistanceNegotiableMOQ: 1 Piece
-
1.4529 Stainless Steel Flat Plate for Chemical Processing EquipmentUS$ 25 - 35MOQ: 1 Kilogram
-
Color Coated Steel Panels for Warehouse Partition Walls (Fireproof Grade)US$ 1 - 1.2MOQ: 50 Kilograms
-
Custom Width (600mm-1250mm) Colored Steel Coil With Scratch ResistanceUS$ 1 - 1.2MOQ: 50 Kilograms
-
0.5mm-3.0mm Colored Coated Steel Sheet With PVDF/Polyester CoatingUS$ 1 - 1.2MOQ: 50 Kilograms
-
JIS G 3322 Compliant Colored Coils With Third-Party Inspection ReportUS$ 1 - 1.2MOQ: 50 Kilograms
