S31803 S2205 Hot Rolled Cold Rolled 6mm Stainless Steel Plate Sheet
UNS S31803 DUPLEX STAINLESS STEEL STOCKHOLDERS AND SUPPLIERS,
DELIVERING TO THE WHOLE OF THE UK. WEST YORKSHIRE STEEL ARE
SUPPLIERS OF UNS S31803, A CHROMIUM NICKEL MOLYBDENUM AUSTENITIC
FERRITIC GRADE. IT COMBINES IMPROVED RESISTANCE TO STRESS CORROSION
CRACKING, PITTING, CREVICE CORROSION AND HIGH STRENGTH IN
COMPARISON WITH OTHER STAINLESS STEEL GRADES. UNS S31803 GRADE
DUPLEX RESISTS CHLORIDE ENVIRONMENTS AND SULPHIDE STRESS CORROSION.
IT IS APPROXIMATELY DOUBLE THE YIELD STRENGTH OF STANDARD
AUSTENITIC STAINLESS STEEL GRADES. AS WITH OTHER DUPLEX STAINLESS
STEEL SPECIFICATIONS OXIDATION RESISTANCE IS GOOD AT HIGH
TEMPERATURE, THOUGH IT IS PRONE TO EMBRITTLEMENT WHEN EXPOSED TO
TEMPERATURES ABOVE 300°C AND IS PRONE TO EMBRITTLEMENT AT 475°C
WHEN EXPOSED FOR 2 HOURS ONLY. IT IS ALSO SUBJECT TO EMBRITTLEMENT
BETWEEN 370-540°C WHEN EXPOSED OVER A LONGER PERIOD.
Super Duplex Stainless Steel – Alloy 2507 (UNS S32750 and UNS
S32760) Specifications
- Super Duplex Plates, Sheet, Coil, and Strip: ASTM A240, ASME A 240
- Super Duplex Seamless Pipes / Tubes: ASTM A 789 / 790, ASME SA 789
/ 790
- Super Duplex Welded Pipes / Tubes: ASTM A 789 / 790, ASME SA 789 /
790
- Super Duplex Bars, Rods, Wire: ASTM A 276 / 479, ASME SA 276 / 479
- Super Duplex Pipe Fittings & Flanges: ASTM A 815, ASME SA 815
- Super Duplex Forged Flanges: ASTM A182 Grade F55
- Super Duplex Forgings: ASTM A473
| STAINLESS STEEL | TRADENAME | UNS NO. | WERKSTOFF NO. | DENSITY (G/CM3) |
| Super Duplex | F55 / 2507, F53 | S32760 / S32750 | 1.4501 / 1.4410 | 7.805 |
Super Duplex – S32760 Grade Stainless Steel Chemical Composition, %
CR | NI | MO | C | W | CU |
|---|
| 24.0-26.0 | 6.0-8.0 | 3.0-4.0 | 0.030 Max | 0.5-1.0 | 0.50-1.0 |
N | MN | SI | P | S | FE |
|---|
| 0.2-0.3 | 1.00 Max | 1.0 Max | 0.03 Max | 0.01 Max | Balance |
Super Duplex – S32750 / 2507 Grade Stainless Steel Chemical
Composition, %
CR | NI | MO | C | N | MN |
|---|
| 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.030 Max | .24-.32 | 1.20 Max |
| Si | Cu | P | S | Fe | |
| 0.80 Max | 0.50 Max | 0.035 Max | 0.020 Max | Balance | |
Physical & Mechanical Properties of Super Duplex 2507 Stainless
Steel (UNS S32750 and UNS S32760)
| SUPER DUPLEX STAINLESS STEEL |
|---|
| Density | 7.805 |
| Melting Range,℃ | 1350 ℃ |
| Elongation % | 15 min. |
| Tensile Strength (Mpa) | 800 |
| Yield Strngth (Mpa) | 550 |
| Hardness (Brinell) | 270 max |
ABOUT Duplex 2205 Stainless Steel
Duplex 2205 Stainless Steel Introduction
Duplex 2205 Stainless Steel Key Properties
Duplex 2205 Stainless Steel Composition
Duplex 2205 Stainless Steel Mechanical Properties
Duplex 2205 Stainless Steel Physical Properties
Duplex 2205 Stainless Steel Grade Specification Comparison
Duplex 2205 Stainless Steel Possible Alternative Grades
Duplex 2205 Stainless Steel Corrosion Resistance
Duplex 2205 Stainless Steel Heat Resistance
Duplex 2205 Stainless Steel Heat Treatment
Duplex 2205 Stainless Steel Welding
Duplex 2205 Stainless Steel Machining
Duplex 2205 Stainless Steel Fabrication
Duplex 2205 Stainless Steel Applications
Duplex 2205 Stainless Steel Chemical Composition
Fe, <0.03% C, 21-23% Cr, 4.5-6.5% Ni, 2.5-3.5% Mo, 0.8-2.0% N,
<2% Mn, <1% Si, <0.03% P, <0.02% S
Duplex 2205 Stainless Steel Introduction
Duplex 2205 stainless steel (both ferritic and austenitic) is used
extensively in applications that
require good corrosion resistance and strength. The S31803 grade
stainless steel has undergone
a number of modifications resulting in UNS S32205, and was endorsed
in the year 1996.
This grade offers higher resistance to corrosion.
At temperatures above 300°C, the brittle micro-constituents of this
grade undergo precipitation,
and at temperatures below -50°C the micro-constituents undergo
ductile-to-brittle transition;
hence this grade of stainless steel is not suitable for use at
these temperatures.
Duplex 2205 Stainless Steel Key Properties
The properties that are mentioned in the below tables pertain to
flat rolled products such as plates,
sheets and coils of the ASTM A240 or A240M. These may not be
uniform across other products
such as bars and pipes.
Duplex 2205 Stainless Steel Composition
Table 1 provides the compositional ranges for grade 2205 duplex
stainless steel.
Table 1 - Composition ranges for 2205 grade stainless steels
| Grade | | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| 2205 (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 (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 |
Duplex 2205 Stainless Steel Mechanical Properties
The typical mechanical properties of grade 2205 stainless steels
are listed in the table below.
Grade S31803 has similar mechanical properties to that of S32205.
Table 2 - Mechanical properties of 2205 grade stainless steels
| Grade | Tensile Str
(MPa) min | Yield Strength
0.2% Proof
(MPa) min | Elongation
(% in 50mm) min | Hardness |
| Rockwell C (HR C) | Brinell (HB) |
| 2205 | 621 | 448 | 25 | 31 max | 293 max |
Duplex 2205 Stainless Steel Physical Properties
The physical properties of grade 2205 stainless steels are
tabulated below. Grade S31803 has similar physical properties to
that of S32205.
Table 3 – Physical properties of 2205 grade stainless steels
| Grade | 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) |
| 0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C |
| 2205 | 782 | 190 | 13.7 | 14.2 | - | 19 | - | 418 | 850 |
Duplex 2205 Stainless Steel Grade Specification Comparison
Table 4 provides the grade comparison for 2205 stainless steels.
The values are a comparison of functionally similar materials.
Exact equivalents may be obtained from the original specifications.
Table 4 - Grade specification comparisons for 2205 grade stainless
steels
Grade | UNS
No | Old British | Euronorm | Swedish SS | Japanese JIS |
|---|
BS | En | No | Name |
|---|
| 2205 | S31803 / S32205 | 318S13 | - | 1.4462 | X2CrNiMoN22-5-3 | 2377 | SUS 329J3L |
Duplex 2205 Stainless Steel Possible Alternative Grades
Given below is a list of possible alternative grades, which may be
chosen in place of 2205.
Table 5 - Grade specification comparisons for 2205 grade stainless
steels
| Grade | Reasons for choosing the grade |
| 904L | Better formability is needed, with similar corrosion resistance and
lower strength. |
| UR52N+ | High resistance to corrosion is required, e.g. resistance to higher
temperature seawater. |
| 6%Mo | Higher corrosion resistance is required, but with lower strength
and better formability. |
| 316L | The high corrosion resistance and strength of 2205 are not needed.
316L is lower cost. |
Duplex 2205 Stainless Steel Corrosion Resistance
Grade 2205 stainless steel exhibits excellent corrosion resistance,
much higher than that of grade 316. It resists localized corrosion
types like intergranular, crevice and pitting. The CPT of this type
of stainless steel is around 35°C. This grade is resistant to
chloride stress corrosion cracking (SCC) at temperatures of 150°C.
Grade 2205 stainless steels are apt replacements to austenitic
grades, especially in premature failure environments and marine
environments.
Material summary and usage
S31803 steel is ultra-low carbon dual- phase stainless acid
resistant steel. It is provided with excellent pitting corrosion
and crevice corrosion resistant performances. In addition,
nitrogen, as a strong element that forms and stabilizes austenite,
still ensures the existence of certain amount of austenite in the
structure even if after welding or heating under high temperature,
and makes it difficult to form single-phase ferrite. The dual-phase
proportion is not sensitive to the change of heating temperature.
Chemical composition(%)
| Standard | No. | C (max) | Si (max) | Mn (max) | P (max) | S (max) | Cr | Ni | Mo | N |
| ASTM | S31803 | 0.030 | 1.00 | 2.00 | 0.030 | 0.020 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
| EN | 1.4462 | 0.030 | 1.00 | 2.00 | 0.035 | 0.015 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.10-0.22 |
Mechanical properties
| No. | Tensile Strength σb(Mpa) | Yield Point σs(Mpa) | Elongation Rate δ5(%) | HB | HRC |
| S31803 | ≥620 | ≥450 | ≥25 | ≤290 | ≥30.5 |
Application fields
It is suitable for manufacturing various industrial heat
exchangers, especially in the H2S condition that contains
chlorides, acetic acid and other organic acid solutions: conveying
pipes in oilfields, oil ports and well heads; air coolers for
oilfields and gas fields; air coolers for refineries and hydrogen
cracking towers; PE coolers; seawater desalting exchangers, etc.
Packing and delivery
If you have any question, please feel free to contact us any time.
