Hunan Dinghan New Material Technology Co., LTD
| Payment Terms | T/T |
| Supply Ability | Negotiable |
| Delivery Time | (Sample order) 7 days |
| Packaging Details | According to customers' requests |
| Product Name | Stainless Steel Seamless Pipe F51 UNS S31803 Duplex Steel Seamless Pipes |
| Grade | F51 / UNS S31803 |
| Size | As per your demands |
| Material | Duplex Stainless Steel |
| Type | Seamless,Welded |
| Application | Desalination plants, Chemical industry, Oil and gas extraction, Heat exchangers, Food processing, Paper industry, Landscape and water facilities, Environmental pollution control, Shipbuilding and offshore engineering, Mining and mineral processing |
| Brand Name | DINGSCO |
| Model Number | According to customers' requirements |
| Certification | ISO 9001:2015,PED 2014/68/EU,API 6A,API-20B,TSG,NORSOK |
| Place of Origin | China |
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Product Specification
| Payment Terms | T/T | Supply Ability | Negotiable |
| Delivery Time | (Sample order) 7 days | Packaging Details | According to customers' requests |
| Product Name | Stainless Steel Seamless Pipe F51 UNS S31803 Duplex Steel Seamless Pipes | Grade | F51 / UNS S31803 |
| Size | As per your demands | Material | Duplex Stainless Steel |
| Type | Seamless,Welded | Application | Desalination plants, Chemical industry, Oil and gas extraction, Heat exchangers, Food processing, Paper industry, Landscape and water facilities, Environmental pollution control, Shipbuilding and offshore engineering, Mining and mineral processing |
| Brand Name | DINGSCO | Model Number | According to customers' requirements |
| Certification | ISO 9001:2015,PED 2014/68/EU,API 6A,API-20B,TSG,NORSOK | Place of Origin | China |
| High Light | seamless nickel alloy pipes ，seamless nickel alloy tubing ，uns s31803 nickel alloy pipes | ||
Stainless Steel Seamless Pipe F51 UNS S31803 Duplex Steel Seamless Pipes
Stainless Steel Seamless Pipe F51, also known as UNS S31803, is a duplex stainless steel grade that combines the benefits of both austenitic and ferritic stainless steels. This dual-phase microstructure provides excellent mechanical properties, high corrosion resistance, and good weldability, making it suitable for a wide range of demanding applications.
Material Composition:
The chemical composition of UNS S31803 (F51) typically includes:
Key Properties:
High Corrosion Resistance:
UNS S31803 offers excellent resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC), particularly in chloride-containing environments.
It is highly resistant to corrosion in acidic, alkaline, and saline environments.
High Strength:
The duplex structure provides higher tensile and yield strength compared to standard austenitic stainless steels, such as 304 or 316.
Typical tensile strength ranges from 620 to 900 MPa, and yield strength ranges from 450 to 620 MPa.
Good Weldability:
UNS S31803 can be welded using common welding techniques, such as TIG, MIG, and SAW, with appropriate filler materials.
Post-weld heat treatment is generally not required.
Excellent Toughness:
The duplex structure provides good toughness and ductility, even at low temperatures.
Resistance to Erosion and Abrasion:
The high chromium and molybdenum content enhances resistance to erosion and abrasion, making it suitable for use in harsh environments.
Applications:
Stainless Steel Seamless Pipe F51 / UNS S31803 is widely used in industries that require high strength and corrosion resistance, including:
Standards and Specifications:
Advantages:
| Grade | UNS | Tensile Strength (MPa min) | Yield Strength (MPa min) | Reduction of Area min (%) | Elongation min (%) | Hardness (HRC) |
| F51 | S31803 | 620 MPa min | 450 MPa min | / | 25% min | HRC24.2max |
Chemical Composition:%
| Ni | Cr | Fe | C | Mn | Si | S |
| 4.5-6.5 | 21.0-23.0 | Balance | 0.3max | 2.0max | 1.0max | 0.02max |
| Mo | P | N | ||||
| 2.5-3.5 | 0.03max | 0.08-0.2 |
More Grades:
| Grade | UNS | DENSITY | EN/DIN W.Nr | CONDITION |
| Nickel 200 | N02200 | 8.89 | 2.4066 | Annealed |
| Nickel 201 | N02201 | 8.89 | 2.4068 | Annealed |
| MONEL 400 | N04400 | 8.80 | 2.4360 | Annealed |
| MONEL K-500 | N05500 | 8.44 | 2.4375 | Aged |
| INCOLOY 825 | N08825 | 8.14 | 2.4858 | Annealed |
| INCOLOY 925 | N09925 | 8.08 | - | Aged |
| INCOLOY 926 | N08926 | 8.1 | 1.4529 | Sol.Annealed |
| INCOLOY A-286 | S66286 | 7.94 | - | - |
| INCOLOY 800 | N08800 | 7.94 | 1.4876 | Annealed |
| INCOLOY 800H | N08810 | 7.94 | 1.4958 | Annealed |
| INCOLOY 800HT | N08011 | 7.94 | 1.4959 | Annealed |
| ALLOY 20 | N08020 | 8.1 | 2.4660 | Annealed |
| ALLOY 28 | N08028 | 8.0 | 1.4563 | Annealed |
| NIMONIC 80A | N07080 | 8.19 | 2.4952 | Aged |
| NIMONIC 901 | N09901 | 8.14 | 2.4662 | - |
| INCONEL 625 | N06625 | 8.44 | 2.4856 | Annealed |
| INCONEL 718 | N07718 | 8.19 | 2.4668 | Aged |
| INCONEL X-750 | N07750 | 8.28 | 2.4669 | Aged |
| INCONEL 600 | N06600 | 8.47 | 2.4816 | Annealed |
| INCONEL 601 | N06601 | 8.11 | 2.4851 | - |
| HASTELLOY C-276 | N10276 | 8.87 | 2.4819 | Annealed |
| HASTELLOY C-22 | N06022 | 8.69 | 2.4602 | Sol.Annealed |
| HASTELLOY C-4 | N06455 | 8.64 | 2.4610 | Sol.Annealed |
| HASTELLOY B-2 | N10665 | 9.22 | 2.4617 | Annealed |
| HASTELLOY B-3 | N10675 | 9.22 | 2.4600 | Annealed |
| HASTELLOY X | N06002 | 8.22 | 2.4665 | Aged |
| F44 | S31254 | 8.0 | 1.4547 | Annealed |
| F51 | S31803 | 7.8 | 1.4462 | Solution |
| F53 | S32750 | 7.8 | 1.4410 | Solution |
| F55 | S32760 | 7.8 | 1.4501 | Solution |
Company Details
Business Type:
Manufacturer,Exporter,Seller
Year Established:
1998
Total Annual:
70 million-100 million
Employee Number:
50~60
Ecer Certification：
Verified Supplier
Hunan Dinghan New Material Technology Co.,Ltd. (DINGSCO) specialized in Nickel Based Corrosion Resistant and High Temperature alloys products which used in the world’s most technically demanding industries and applications. We have complete advanced technology facilities to produc... Hunan Dinghan New Material Technology Co.,Ltd. (DINGSCO) specialized in Nickel Based Corrosion Resistant and High Temperature alloys products which used in the world’s most technically demanding industries and applications. We have complete advanced technology facilities to produc...
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