Duplex Stainless Steel Pipe Grade 2205 S32205 1.4462 SS Pipe
Seamless Stainless Steel Pipe
Our company is special in selling all kinds of duplex stainless
steel pipe with standard ASTM A789 SA789 S31803 S32205 2205 Duplex
Tubes and ASTM A790 SA790 S31803 S32205 2205 Duplex Pipes.
| Dimension | Welded: 1/2″~72″
Seamless: 3/8″~16″ / SCH 5S SCH10S, 40S, STD, XS, SCH80S |
|---|
| Grade | UNS S31803, S32205, S32750, S32760, S32304, 1.4462, 1.4410, 1.4501,
1.4362 etc. |
|---|
| Standard | ASTM A789, ASTM A790, ASME SA 789 SA 790, EN 10216-5,
EN/DIN17455-2, EN17456-2 etc. |
|---|
Duplex Steel is featured with structure of two phases (α and γ) and
has characteristics of both ferritic and austenitic stainless
steel. It has good corrosion resistance and high strength. It is
alloyed with 18%-28% Cr and 3%-10% Ni in the condition of low C.
Some steels also contain the alloy elements such as Mo, Cu, Nb, Ti
and N, etc. Comparing with ferritic stainless, duplex stainless
steel has higher plasticity, ductility and better intergranular
corrosion resistance and weldability. It keeps same 475°C
brittleness with ferritic stainless and high thermal conductivity.
Duplex has improved yield strength, resistance to intergranular
corrosion, stress corrosion, corrosion fatigue and abrasion &
corrosion compared with austenitic stainless steel.
Alloy 2205 UNS S32305/S31803 is a 22% chromium, 3% molybdenum, 5-6%
nickel, nitrogen alloyed Duplex Stainless Steel Pipe with high
general, localized, and stress corrosion resistance properties in
addition to high strength and excellent impact toughness.
Alloy 2205 provides pitting and crevice corrosion resistance
superior to 316L or 317L austenitic stainless steel tube in almost
all corrosive media. It also has high corrosion and erosion fatigue
properties as well as lower thermal expansion and higher thermal
conductivity than austenitic.
2101 is a low nickel, lean duplex stainless steel possessing both
superior strength and chloride stress-corrosion cracking resistance
when compared to 300 series stainless steel.
2304 A lean austenitic-ferritic duplex stainless steel with general
corrosion resistance similar to 316, but with yield strength nearly
double that of austenitic stainless steel.
S31803 and S32205 are standard duplex stainless steel. A nitrogen,
molybdenum enhanced austenitic-ferritic duplex stainless steel with
general corrosion resistance similar to 904L, but with a yield
strength nearly double that of austenitic stainless steel.
2507 (PREN 40-45), with 25-26 Cr and increased Mo and N compared
with the 25Cr grades. A super austenitic-ferritic duplex stainless
steel with exceptional strength and corrosion resistance ideal for
chemical process, petrochemical, and seawater applications.
Standard Informations
ASTM A789 – 17 Standard Specification for Seamless and Welded
Ferritic/Austenitic Stainless Steel for General Service
ASTM A790 – 16 Standard Specification for Seamless and Welded
Ferritic/Austenitic Stainless Steel Pipe
ASTM A923 Standard Test Methods for Detecting Detrimental
Intermetallic Phase in Duplex Austenitic/Ferritic Stainless Steel
ASTM A928 A928M Standard Specification for Ferritic/Austenitic
(Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition
of Filler Metal
ASTM A789 (ASME SA789) Standard Specification for Seamless and
Welded Ferritic/Austenitic Stainless Steel Tubing for General
Service
ASTM A790 (ASME SA790) Standard Specification for Seamless and
Welded Ferritic/Austenitic Stainless Steel Pipe
ASTM A923 Standard Test Methods for Detecting Detrimental
Intermetallic Phase in Duplex Austenitic/Ferritic Stainless Steel
ASTM A928 Standard Specification for Ferritic/Austenitic (Duplex)
Stainless Steel Pipe Electric Fusion Welded with Addition of Filler
Metal
EN 10216-5 Seamless steel tubes for pressure purposes
GB/T 21832-2008 Austenitic–Ferritic(duplex) grade stainless steel
welded tubes and pipes
GB/T 21833-2008 Austenitic-Ferritic (duplex) grade stainlee steel
seamless tubes and pipes
Duplex Stainless Steel Pipe Specification
Standard
Item | ASTM A789 | ASTM A790 | EN 10216-5 |
| Grade | S31803 S32205 S32750 | S31803 S32205 S32750 | 1.4301 1.4307 1.4948 1.4315
1.4401 1.4404 1.4571 1.4541
1.4941 1.4845 1.4449 1.4438
1.4550 1.4912 1.4462 1.4410 |
Yield Strength
(Mpa) | ≥450；≥485；≥550 | ≥450；≥450；≥550 | --- |
Tensile Strength
(Mpa) | ≥620；≥655；≥800 | ≥620；≥655；≥800 | --- |
| Elongation(%) | ≥25；≥25；≥15 | ≥25；≥25；≥15 | --- |
| Hydrostatic Test | | | The hydrostatic test shall be carried out at a test pressure of
7MPa or
at a test pressure calculated using the following formula
P=2St/D S=70%Rp0.2 |
| Intergranular Corrosion Test | Usually use Pitting Corrosion Test. | Usually use Pitting Corrosion Test. | EN ISO 3651-2 (Optional) |
| Eddy Current Test | Could be replaced by HT. | Could be replaced by HT. | EN 10246-3 |
O.D. Tolerance
(mm) | O.D. | O.D.Tolerance | O.D. | O.D.Tolerance | O.D. Tolerance Class |
| D<12.7 | +/-0.13 | 10.3≤D≤48.3 | +0.40/-0.80 | D3 | +/-0.75% or
+/-0.3mm |
| 12.7≤D<38.1 | +/-0.13 | 48.3<D≤114.3 | +0.80/-0.80 |
| whichever is the greater |
| 38.1≤D<88.9 | +/-0.25 | 114.3<D≤219.1 | +1.60/-0.80 | D4 | +/-0.5% or
+/-0.1mm |
| 88.9≤D<139.7 | +/-0.38 | 219.1<D≤457.0 | +2.40/-0.80 |
| whichever is the greater |
W.T. Tolerance
(mm) | O.D. | W.T.Tolerance | O.D. | W.T.Tolerance | W.T. Tolerance Class |
| D<12.7 | +/-15% | 10.3≤D≤73.0 | +20.0%/-12.5% | T3 | +/-10% or
+/-0.2mm |
| 12.7≤D<38.1 | +/-10% |
88.9≤D≤457.0
t/D ≤5% | +22.5%/-12.5% | whichever is the greater |
| 38.1≤D<88.9 | +/-10% | T4 | +/-7.5% or
+/-0.15mm |
88.9≤D≤457.0
t/D >5% | +15.0%/-12.5% |
| 88.9≤D<139.7 | +/-10% |
| whichever is the greater |
