Yuhong Holding Group Co.,LTD
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| Place of Origin: | China |
| Brand Name: | YUHONG |
| Certification: | ABS, LR, GL, DNV, NK, TS, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Model Number: | A790 / SA790 S32205&S31803 |
| Minimum Order Quantity: | 500KGS |
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| Price: | NEGOTIABLE |
| Packaging Details: | Ply-wooden Case /Iron Case/ Bundle with plastic Cap |
| Delivery Time: | 10-30 DAYS |
| Payment Terms: | L/C, T/T |
| Supply Ability: | 1500 tons per month |
| Product Name: | SUPER DUPLEX STAINLESS STEEL SMLS PIPE | Material: | S32205/S31803 |
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| Specification: | ASTM A790 / ASME SA790 | Welding Line Type: | Seamless |
| Application: | Industry/Oil And Gas/Chemical Process Plant | Length: | As Required |
| Outer Diameter: | 6mm-630mm Or Customized | Standard: | ASTM/ASME |
| High Light: | astm a790 duplex steel tube,bright annealed duplex steel tube,asme sa 790 s32205 super duplex pipe |
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Overview
Duplex stainless steels are called“duplex”because they have a two-phase microstructure consisting of grains of ferritic and austenitic stainless steel. When duplex stainless steel is melted it solidifies from the liquid phase to a completely ferritic structure. As the material cools to room temperature, about half of the ferritic grains transform to austenitic grains (“islands”). The result is a microstructure of roughly 50% austenite and 50% ferrite.
Whilst duplex stainless steel are considered resistant to stress corrosion cracking, they are not as resistant to this form of attack as ferritic stainless steel. However, the corrosion resistance of the least resistant Duplex stainless steel is greater than that for the most commonly used grades of stainless steel, i.e. 304 and 316.
Duplex stainless steel are also magnetic, a property that can be used to easily differentiate them from common austenitic grades of stainless.
Specification
ASTM A789/A789M-20 Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service.
| Specifications | ASTM A790 / ASME SA790, ASTM A789 / ASME SA A789 |
| Standards | ASTM, ASME and API |
| Size | 1/2″NB TO 12″NB IN |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80 |
| Type | Seamless / ERW / Welded / Fabricated |
| Form | Round Tubes, Custom Tubes, Square Tubes, Rectangular Tubes, “U” Shape, Hydraulic Tubes |
| Length | Single Random, Double Random & Cut Length. |
| End | Plain End, Beveled End, Treaded |
Equivalent Grade
|
Grade |
UNS No |
Old British |
Euronorm |
Swedish SS |
Japanese JIS |
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|---|---|---|---|---|---|---|---|
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BS |
En |
No |
Name |
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| 2205 | S31803 / S32205 | 318S13 | – | 1.4462 | X2CrNiMoN22-5-3 | 2377 | SUS 329J3L |
Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 2205 (UNS S31803) | Min Max | – 0.030 | – 2.00 | – 1.00 | – 0.030 | – 0.020 | 21.0 23.0 | 2.5 3.5 | 4.5 6.5 | 0.08 0.20 |
| 2205 (UNS S32205) | Min Max | – 0.030 | – 2.00 | – 1.00 | – 0.030 | – 0.020 | 22.0 23.0 | 3.0 3.5 | 4.5 6.5 | 0.14 0.20 |
Mechanical Properties
| Grade | Tensile Strength (MPa) min |
Yield Strength 0.2% Proof (MPa) min |
Elongation (% in 50mm) min |
Hardness | |
| Rockwell C (HR C) | Brinell (HB) | ||||
| UNS S31803 / 2205 | 621 | 448 | 25 | 31 max | 293 max |
| UNS S32205 / 2205 | 621 | 448 | 25 | 31 max | 293 max |
Physical Properties
| Grade 2205 | Density (kg/m3) |
Elastic Modulus(GPa) |
Mean Co-eff of Thermal Expansion (μm/m/°C) |
Thermal Conductivity (W/m.K) |
Specific Heat 0-100°C( J/kg.K) |
Electrical Resistivity (nΩ.m) |
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| 0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C | |||||
| UNS S32205 / UNS S31803 | 782 | 190 | 13.7 | 14.2 | – | 19 | – | 418 | 850 |
Applications
Contact Person: Kelly Huang
Tel: 0086-18258796396
Fax: 0086-574-88017980
