Duplex Stainless Steel S31803 is the most common duplex grade in the market with high mechanical strength. It is widely used in Oil & Gas Industry, hydro power, pressure vessels, pulp & Equipment for the Paper Industry, Paper Industry, structural components and chemical tankers. The alloy is not intended to be used at temperatures above 300°C due to embrittlement.
UNS S31803/2205 is a duplex grade with a ferritic-austenitic microstructure. The alloy consists of around 40-50% ferrite in the annealed condition. The duplex microstructure has the high strength of the ferritic grades whilst retaining the corrosion resistance of the austenitic grades. It is not uncommon to see the metal used as a practical solution to chloride-induced stress cracking, which is the achilles’ heel of stainless steel.
| Tensile Strength,min. | Yield Strength,min. | Elongation,min. | Hardness Brinell, max |
| Mpa | Mpa | % | HB |
| 620 | 450 | 25 | 290 |
PHYSICAL PROPERTIES OF DUPLEX STAINLESS STEEL S31803 SHEET
| Density | Thermal Expansion | Modulus of Elasticity | Thermal Conductivity | Electrical Resistivity |
| g/cm3 | K | Gpa | W/m.k | Ω.m |
| 7.805 | 13.7*10-6 | 200 | 19.0 | 0.085*10-6 |
DUPLEX STEEL SHEETS SPECIFICATION
|
Grades |
S31803 / S32205 (2205) |
|
Standard |
ASTM A240 / ASME SA240 |
|
Dimensions |
ASTM, ASME, and API |
|
Width |
1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, etc |
|
Thickness |
4mm-100mm |
|
Length |
2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc |
|
Surface Finish |
2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, embossed, hairline, sand blast, Brush, etching, Hot rolled Sheets (HR), Cold rolled sheet (CR), SATIN (Met with Plastic Coated) etc |
|
Hardness |
Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc. |
|
Form |
Plain Sheet, Shim Sheet, Perforated Sheet |
USAGE & APPLICATION OF DUPLEX STAINLESS STEEL SHEET
- Construction
- Bridges
- Ship Building
- Offshore and Onshore Services
- General Structural Purposes
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UAE, Bahrain, Italy, Indonesia, Malaysia, United States, Mexico, Jordan,
Vendula, Brazil, Peru, Nigeria, Kuwait, Oman,
Thailand (Bangkok), Iran,
Germany, UK, Canada, Russia, Turkey, Australia, New Zealand, Sri Lanka,
Vietnam, South Africa,
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