Duplex Stainless Steel Coil

Introduction:

Duplex Stainless Steel (DSS for short) refers to stainless steel with ferrite and austenite each accounting for about 50%, and the content of less phases generally needs to reach at least 30%. In the case of low C content, the Cr content is 18%~28%, and the Ni conte0%. Some duplex stainless steel grades also contain alloying elements such as Mo, Cu, Nb, Ti, N, etc.
Super duplex stainless steel coil has the characteristics of both austenitic and ferritic stainless steel. Compared with ferrite, it has higher plasticity and toughness, no room temperature brittleness, and significantly improved intergranular corrosion resistance and welding performance. At the same time, it also maintains the 475°C brittleness of ferritic stainless steel, high thermal conductivity, and superplasticity. Compared with austenitic stainless steel, it has high strength and significantly improved resistance to intergranular corrosion and chloride stress corrosion.
Duplex stainless steel coil has excellent pitting corrosion resistance and is also a nickel-saving stainless steel.Chinese duplex stainless steel coils are classified according to chemical composition and can be divided into four types: Cr18 type, Cr23 (excluding Mo), Cr22 type and Cr25 type. Cr25 duplex stainless steel is divided into ordinary type and super duplex stainless steel coil. The specific grades of duplex stainless steel grades are 2205, 2304, 2507, etc.

Standards:

Features and Applications:

S31500:
Good resistance to stress corrosion cracking, pitting resistance equivalent to 316L stainless steel, high strength, suitable for environments containing chloride ions, used in oil refining, fertilizer, paper, petroleum, chemical and other industries to manufacture heat exchangers, condensers, etc. .

S31803:
It has high strength, good stress corrosion resistance, pitting corrosion resistance and good welding performance, and has a wide range of uses in petrochemical, shipbuilding, papermaking, seawater desalination, nuclear power and other fields.

S32205, 2205 duplex stainless steel coil:
It belongs to low-alloy duplex stainless steel with high strength and can replace S30403 and S31603. It can be used in boilers and pressure vessels, pipes in chemical plants and refineries.

S32304, 2304 duplex stainless steel coil:
It has a duplex structure, excellent resistance to stress corrosion cracking and other forms of corrosion resistance, and good weldability. Mainly used in petroleum and petrochemical, papermaking, seawater desalination and other industries.

S31200:
The corrosion fatigue resistance is far better than that of S31603 (urea grade), which has important reference value for the material selection of urea methylamine pumps working under low stress and low frequency alternating load conditions. It is mainly used in chemical industry, chemical fertilizer, petrochemical industry and other fields. It is mostly used in the manufacture of heat exchangers and evaporators. It is mainly used in urea plants in China and can also be used in seawater corrosion-resistant parts.

S32550, 255:
The steel has good mechanical properties and local corrosion resistance, especially the wear and corrosion resistance is better than ordinary stainless steel. It is an ideal material in seawater environment, suitable for screw propellers, shafts, submarine seals, etc. for ships, and it is also used in chemical, petrochemical, natural gas, pulp, paper and other applications.

S32750, 2507 duplex stainless steel coil:
It is the steel with the best local corrosion resistance among duplex stainless steels, especially the best resistance to pitting corrosion, and has the characteristics of high strength, chloride stress corrosion resistance, and weldability. It is very suitable for heat exchange equipment using river water, ground water and sea water as cooling medium in chemical, petroleum, petrochemical and power industries.

S32760:
Adding W and Cu to 022Cr25Ni7Mo3N steel improves the performance of Cr25 dual-phase steel. In particular, it has better resistance to chloride pitting and crevice corrosion, and is mainly used for heat exchange equipment with water (including seawater and brine) as the medium.

S32003:
Contains 1.5% Mo, cooperates with Cr and N to improve corrosion resistance, its corrosion resistance is better than 316L steel, close to 317L stainless steel, and is an ideal substitute for 316L. At the same time, this steel has high strength and can be used in chemical storage tanks, pulp and paper, building roofs, bridges and other fields.

S32101:
Low Ni and high N content make it have high strength, good corrosion resistance and welding performance, and the manufacturing cost is greatly reduced. This steel has better corrosion resistance than 304L stainless steel and equivalent to 316L stainless steel coil. It is an ideal substitute for 304/304L stainless steel and is used in petrochemical, shipbuilding, papermaking, nuclear power, seawater desalination, construction and other fields.

S32001:
The content of alloy Ni and Mo is greatly reduced, and it contains higher N content, which has high strength, good corrosion resistance, welding performance and low cost. This steel has the same corrosion resistance as 304L stainless steel, and can replace 304/304L stainless steel within a certain range, and is used in construction, transportation, petrochemical and other fields.

S81921:
Containing 1%~2% Mo and higher N, it has good corrosion resistance and welding performance, and at the same time, the cost is reduced due to the substitution of Mn and N for Ni. This steel has comparable or even better pitting corrosion resistance and uniform corrosion resistance than 316L stainless steel sheet, and its stress corrosion resistance has also been significantly improved. It is an ideal substitute for 316L and is used in construction, storage tanks, papermaking, petrochemical and other fields.

S82011:
Containing high Cr and N, the pitting corrosion resistance and uniform corrosion resistance of the material are higher than 304L, comparable to 316L, the stress corrosion resistance is significantly improved, and it has good welding performance. It can replace 304L stainless steel coil and 316L stainless steel coil. In construction, storage tanks, petrochemical, energy and other fields.

S32202:
Substituting Ni with higher N, the Mo content is lower, and the cost is significantly reduced. Because it contains about 23% Cr and about 0.2% N, the pitting corrosion resistance and uniform corrosion resistance of the material are equivalent to or even higher than 316L, the stress corrosion resistance is significantly improved, and the welding performance is excellent. It can replace 316L for construction , storage tanks, petrochemical and other fields.

S82441:
Substituting Ni with higher N and a certain content of Mn, the Cr content is lower, thereby reducing the cost. Because it contains about 24% Cr and about 0.25% N, the material has high pitting corrosion resistance and uniform corrosion resistance. 316L is close to 317L. The stress corrosion resistance is significantly improved and the welding performance is excellent. It can replace 316L and 317L. Used in petrochemical, papermaking, construction, storage tanks and other fields.

FAQ:

Q:Can you send samples?
A:Sample can be for free,freight cost collect.
Q:What product information do I need to provide?
A:Steel grade/thickness/width/quantity,these will decide the price.
Q:About product prices?
A:Prices vary from period to period due to cyclical changes in the price of raw materials.
Q:What are the certifications for your products?
A:We have ISO 9001,CE,SGS,BV and other certifications.
Q:How about the delivery time?
A:Regularly the delivery time around 10-15 days,customized one will inform the delivery time ahead.
Q:Does the product have quality inspection before loading?
A:All the products are strictly tested before packaging,also can inspect by third party inspection.
Q:How to pack the products?
A:Standard export package with waterproof film and wooden pallet.It can effectively protect products from corrosion.