S31803 Duplex Stainless Steel Pipe Industry Tube 22% Cr UNS S31803
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S31803 Duplex Stainless Steel Industry Pipe 22%Cr Duplex Pren ≥34.0
2205 (UNS S31803) 22% chromium duplex stainless steel
General attributes:
Duplex stainless steel has an α + γ dual-phase structure, so its
performance characteristics are built of austenitic stainless steel
and ferritic stainless steel. It is a type of stainless steel with
high strength and best corrosion resistance. Generally, in the case
of low C content, the Cr content is 18% to 28%, and the Ni content
is 3% to 10%. Some steels also contain alloying elements such as
Mo, Cu, Nb, Ti, and N.
Compared with ferrite, it has higher plasticity and toughness, no
room temperature brittleness, significantly improved intergranular
corrosion resistance and welding performance, while maintaining the
475 ° C brittleness and high thermal conductivity of ferritic
stainless steel, and has superplasticity, etc. Features. Compared
with austenitic stainless steel, the yield strength is
significantly improved, and the resistance to intergranular
corrosion, stress corrosion, corrosion fatigue and abrasion is
significantly improved.
Material: S31803 / S32250, S32750, S32760, S31500, S31500, 32001, S32003,
S32304
| Chemical Composition
(％) | Mechanical properties | |
|
| Type | UWS | C≤ | Cr | Ni | Mo | Cu | N | Tensile strength ≥ ksi (Mpa) | Yield Strength ≥ ksi (Mpa) | Elongation |
| Grade | 2in or |
| 50mm,≥ % |
| low alloy | S31500 | 0.03 | 18.0-19.0 | 4.50-5.25 | 2.5-3.0 | … | 0.05-0.10 | 92(630) | 64(440) | 30 |
| S32001 | 0.03 | 19.5-21.5 | 10-3.0 | ≤0.60 | ≤ 1.00 | 0.05-0.17 | 90(620) | 65(450) | 25 |
| S32003 | 0.03 | 19.5-22.5 | 3.0-4.0 | 1.5-2.0 | … | 0.14-0.20 | 90(620) | 65(450) | 25 |
| S32304 | 0.03 | 21.5-24.5 | 3.0-5.5 | 0.05-0.60 | 0.05-0.60 | 0.05-0.20 | 87(600) | 65(450) | 25 |
| Medium alloy | S31803 | 0.03 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | … | 0.08-0.20 | 90(620) | 58(400) | 25 |
| S32205 | 0.03 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | … | 0.14-0.20 | 95(655) | 65(450) | 25 |
| High alloy | S32550 | 0.04 | 24.0-27.0 | 4.5-6.5 | 2.9-3.9 | 15-2.5 | 0.10-0.25 | 110(760) | 70(485) | 15 |
| Super DSS | S32750 | 0.03 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | ≤0.5 | 0.24-0.32 | 116(800) | 80(550) | 15 |
|
| S32760 | 0.05 | 24.0-26.0 | 6.0-8.0 | 3.0-4.0 | 0.5-10 | 0.20-0.30 | 109(750) | 80(550) | 25 |
Implementation standards:
ASTM A789 (ASME SA789)
ASTM A790 (ASME SA790)
ASTM A928 (ASME SA928)
GB / T 21832-2008
GB / T 21833-2008
Specifications of the Duplex Stainless Steel Industry Pipe:
Outer diameter Φ6—630mm; wall thickness: 1-50mm, maximum length
18000mm
Special specifications are available upon negotiation.
Performance characteristics:
1. Excellent resistance to general corrosion and local corrosion,
especially stress corrosion resistance, pitting corrosion
resistance, crevice corrosion resistance, corrosion fatigue
resistance and wear resistance etc.
2. Good solderability
3. Good comprehensive mechanical properties
4. Good resistance to intergranular corrosion
5. High cost performance and long service life
Application fields are:
oil and gas industry equipment; offshore platforms, heat
exchangers, underwater equipment, fire fighting equipment; chemical
processing industry, utensils and pipeline industry; desalination
plants, submarine pipelines; mechanical components (high-strength,
corrosion-resistant components), Energy industry FGD system,
industrial scrubbing system, absorption tower, etc.
Delivery form:Sheet, strip, bar, pipe (welded and seamless pipe), wire, forging,
light rod, flange, welding
SHANGHAI ABOOM METAL PRODUCT CO.,LTD
Address:ROOM 412,NO.452 CHEFENG ROAD,
SongjiangDistrict , Shanghai ,201601,P.R.China
