ASME SA789 S31803 Duplex Stainless Steel Heat Exchanger Tube
Price:
1 - 10000 USD
MOQ:
1 PC
Delivery Time:
5 - 60 Days
Brand:
YUHONG
Product Description
ASME SA789 S31803 Duplex Stainless Steel Heat Exchanger Tube
Product Specifications
| Attribute | Value |
|---|---|
| Material | S31803 |
| Standard | ASME SA789 |
| Ends | PE, BE |
| Testing | HT, ET |
| Size | 1/2 inch - 98 inch |
| Application | Heat Exchanger |
Product Description
Grade S31803 is a duplex stainless steel featuring a mixed microstructure of austenite and ferrite phases, typically in a 50/50 ratio. This unique composition provides superior strength and enhanced resistance to stress corrosion cracking compared to standard austenitic stainless steels. S31803 is renowned for its exceptional performance in highly corrosive environments, particularly those containing chlorides and other aggressive chemicals.
Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Ni | Mo | N | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| S31803 | ≤ 0.03% | ≤ 2.00% | ≤ 1.00% | ≤ 0.03% | ≤ 0.02% | 21.00-23.00% | 4.50-6.50% | 2.50-3.50% | 0.08-0.20% | Balance |
Mechanical Properties
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness |
|---|---|---|---|---|
| S31803 | Minimum 620 MPa (90,000 psi) | Minimum 450 MPa (65,000 psi) | 25% minimum in 50 mm | ≤ 290 HB (Brinell Hardness) |
Key Features
- High Strength: Approximately twice the yield strength of austenitic stainless steels
- Corrosion Resistance: Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in chloride environments
- Weldability: Good weldability with proper technique and post-weld treatment
- Durability: High mechanical strength and toughness, even at low temperatures
Applications
Chemical Processing Industry:
- Heat exchangers where aggressive chemicals are processed, ensuring high performance and longevity
- Reactors and pressure vessels dealing with highly corrosive substances
- Piping systems that transport aggressive chemicals at high pressures and temperatures
Oil and Gas Industry:
- Offshore oil rigs and platforms where exposure to seawater and corrosive environments is common
- Subsea equipment due to its excellent resistance to stress corrosion cracking and pitting
- Components in refineries that process sour gas and other corrosive substances
Marine Applications:
- Shipbuilding in marine environments where components are exposed to seawater
- Seawater cooling systems due to its high resistance to chloride-induced corrosion
- Desalination plant tubing where high resistance to pitting and crevice corrosion is necessary
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
YUHONG HOLDING GROUP CO., LTD
Location
20 Floor, No.1 New World Building, NO.1018 Min'an Road, Yinzhou District, Ningbo, China, ZIP:315040
Contact Person
Sales Dept. (Marketing Director)