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JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
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2205 Stainless Steel Flat Bar UNS S31803/ S32205 Duplex Steel Flat Bar

JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
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2205 Stainless Steel Flat Bar UNS S31803/ S32205 Duplex Steel Flat Bar

Brand Name : MITTEL

Model Number : S32205

Certification : SGS ISO MTC

Place of Origin : China

MOQ : 100KGS

Price : 4.15 USD/KG

Payment Terms : L/C, T/T

Supply Ability : 50000KGS

Delivery Time : 14 DAYS

Packaging Details : Export Packing

Grade : 2205/S31803

Application : Construction,Industry,Steel Grating,ships building industry,rudder shaft

Standard : ASTM,AISI,JIS

Shape : Falt Plate

Type : Flat

Length : 5.8-12m

Technique : Hot Rolled,Cold Drawn

Product name : SS 201 304 316 410 420 2205 316L 310S Stainless Steel Round / flat Bar

Surface : Polished

Width : 10mm~500mm

Thickness : 1.5mm-20mm

Price term : CIF CFR FOB EX-WORK

Stock : YES

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Alloy 2205

Duplex Stainless Plate

Sandmeyer Steel Company has an extensive inventory of 2205 duplex stainless steel plate in thicknesses from 3/16" (4.8mm) through 6" (152.4mm). The yield strength is about twice that of austenitic stainless steels, thus allowing a designer to save weight and making the alloy more cost competitive when compared to 316L or 317L.

Available thicknesses for Alloy 2205:

3/16"1/4"5/16"3/8"1/2"5/8"3/4"7/8"1"1 1/8"1 1/4"1 3/8"1 1/2"
4.8mm6.3mm7.9mm9.5mm12.7mm15.9mm19mm22.2mm25.4mm28.6mm31.8mm34.9mm38.1mm
1 5/8"1 3/4"2"2 1/4"2 1/2"2 3/4"3"3 1/4"3 1/2"4"5"6"
41.3mm44.5mm50.8mm57.2mm63.5mm69.9mm76.2mm82.6mm88.9mm101.6mm127mm152.4mm

Alloy 2205 (UNS S32305/S31803) is a 22% chromium, 3% molybdenum, 5-6% nickel, nitrogen alloyed duplex stainless steel plate with high general, localized, and stress corrosion resistance properties in addition to high strength and excellent impact toughness.

Alloy 2205 duplex stainless steel plate provides pitting and crevice corrosion resistance superior to 316L or 317L austenitic stainless steels 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.

General Properties

Alloy 2205 duplex stainless steel plate is a 22% Chromium, 3% Molybdenum, 5-6% Nickel nitrogen alloyed duplex stainless steel plate with high general, localized and stress corrosion resistance properties in addition to high strength and excellent impact toughness.

Alloy 2205 duplex stainless steel plate provides pitting and crevice corrosion resistance superior to 316L or 317L austenitic stainless steels 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.

The yield strength is about twice that of austenitic stainless steels. This allows a designer to save weight and makes the alloy more cost competitive when compared to 316L or 317L.

Alloy 2205 duplex stainless steel plate is particularly suitable for applications covering the -50°F/+600°F temperature range. Temperatures outside this range may be considered but need some restrictions, particularly for welded structures.


Applications

  • Pressure vessels, tanks, piping, and heat exchangers in the chemical processing industry
  • Piping, tubing, and heat exchangers for the handling of gas and oil
  • Effluent scrubbing systems
  • Pulp and paper industry digesters, bleaching equipment, and stock-handling systems
  • Rotors, fans, shafts, and press rolls requiring combined strength and corrosion resistance
  • Cargo tanks for ships and trucks
  • Food processing equipment
  • Biofuels plants

Standards

ASTM/ASME...........A240 UNS S32205/S31803
EURONORM...........1.4462 X2CrNiMoN 22.5.3
AFNOR...................Z3 CrNi 22.05 AZ
DIN.........................W. Nr 1.4462

Corrosion Resistance

General Corrosion
Because of its high chromium (22%), molybdenum (3%), and nitrogen (0.18%) contents, the corrosion resistance properties of 2205 duplex stainless steel plate are superior to that of 316L or 317L in most environments.

Localized Corrosion Resistance
The chromium, molybdenum, and nitrogen in 2205 duplex stainless steel plate also provide excellent resistance to pitting and crevice corrosion even in very oxidizing and acidic solutions.

Isocorrosion Curves

Isocorrosion Curves 4 mpy (0.1 mm/yr), in sulfuric acid solution containing 2000 ppm

Stress Corrosion Resistance
The duplex microstructure is known to improve the stress corrosion cracking resistance of stainless steels.

Chloride stress corrosion cracking of austenitic stainless steels can occur when the necessary conditions of temperature, tensile stress, oxygen, and chlorides are present. Since these conditions are not easily controlled, stress corrosion cracking has often been a barrier to utilizing 304L, 316L, or 317L.

Corrosion Fatigue Resistence
Alloy 2205 duplex stainless steel plate combines high strength and high corrosion resistance to produce high corrosion fatigue strength. Applications in which processing equipment is subject to both an aggresively corrosive enviroment and to cycle loading can benefit from the properties of 2205 duplex stainless steel plate.

Critical Pitting Temperature

Critical Pitting Temperature in 1M NaCl Measured using the Outokumpu Stainless, Inc Pitting Cell

Critical Crevice Corrosion Temperature

Critical Crevice Corrosion Temperature (CCT) in 10% FeCl3•6H2O

General Corrosion in Wet Process Phosphoric Acids

Corrosion Rate, ipy
GradeSolution A, 1401/4FSolution B, 1201/4F
22053.13.9
316L>200>200
904L476.3
Composition, wt%
P2O5HClHFH2SO4Fe2O3Al203SiO2CaOMgO
Sol A 54.00.061.14.10.270.170.100.200.70
Sol B 27.50.341.31.720.40.0010.30.02

Stress Corrosion Cracking Resistance

BoilingWickBoiling
Grade42% MgCl2Test25% NaCl
2205FPP
254 SMO®FPP
Type 316LFFF
Type 317LFFF
Alloy 904LFP or FP or F
Alloy 20FPP

(P = Pass, F = Fail)

Chemical Analysis

Typical Values (Weight %)

CarbonChromiumNickelMolybdenumNitrogenOthers
0.02022.15.63.10.18S=0.001
PREN = [Cr%] = 3.3 [Mo%] = 16 [N%] ≥ 34

Mechanical Properties

Mechanical Properties at Room Temperature

ASTM A 240Typical
Yield Strength 0.2%, ksi65 min.74
Tensile Strength, ksi90 min.105
Elongation, %25 min.30
Hardness RC32 max.19

Tensile Properties at Elevated Temperatures

Temperature °F122212392572
Yield Strength 0.2%, ksi60524541
Tensile Strength, ksi96908381

Physical Properties

Temperature °F68212392572
Densitylb/in30.278
Modulus of Elasticitypsi x 10627.626.125.424.9
Linear Expansion (68°F-T)10-6/°F7.57.88.1
Thermal ConductivityBtu/h ft°F8.79.29.810.4
Heat CapacityBtu/lb ft°F0.1120.1190.1270.134
Electrical ResistivityΩin x 10-633.535.437.439.4

Structure

The chemical analysis of 2205 duplex stainless steel plate is optimized to obtain a typical 50 a/ 50 g microstructure after solution annealing treatment at 1900°/1922°F (1040°/1080°C).

Chloride Pitting Resistance

The pitting resistance of an austenitic stainless steel can be related directly to alloy composition, where chromium, molybdenum and nitrogen are a weight %. The Pitting Resistance Equivalent Number (PREN) uses the following formula to measure an alloy's relative pitting resistance - the higher the number, the better the pitting resistance.

Processing

Hot Forming

Forming below 600°F is recommended whenever possible. When hot forming is required, the workpiece should be heated uniformly and worked in the range of 1750 to 2250°F. Alloy 2205 duplex stainless steel plate is quite soft at these temperatures and is readily formed. Above this range, 2205 is subject to hot tearing. Immediately below this range, the austenite becomes substantially stronger than the ferrite and may cause cracking, a particular danger to “cold” edges. Below 1700°F there can be rapid formation of intermetallic phases because of the combination of temperature and deformation. Whenever hot forming is done, it should be followed by a full solution anneal at 1900°F minimum and rapid quench to restore phase balance, toughness, and corrosion resistance. Stress relieving is not required or recommended; however, if it must be performed, the material should receive a full solution anneal at 1900°F minimum, followed by rapid cooling or water quenching.

Cold Forming

Alloy 2205 duplex stainless steel plate is readily sheared and cold formed on equipment suited to working stainless steels. However, because of the high strength and rapid work hardening of 2205 duplex stainless steel plate, forces substantially higher than those for austenitic steels are required to cold form it. Also because of the high strength, a somewhat larger allowance must be made for springback.

Heat Treatment

Alloy 2205 duplex stainless steel plate should be annealed at 1900°F minimum, followed by rapid cooling, ideally by water quenching. This treatment applies to both solution annealing and stress relieving. Stress relief treatments at any lower temperature carry the risk of precipitation of detrimental intermetallic or nonmetallic phases.

Machinability

With high-speed steel tooling, 2205 duplex stainless steel plate may be machined at the same feeds and speeds as Alloy 316L. When carbide tooling is used, cutting speeds should be reduced by about 20% relative to the speeds for Alloy 316L. Powerful machines and rigid mounting of tools and parts are essential.

Welding

Alloy 2205 duplex stainless steel plate possesses good weldability. The goal of welding 2205 is that the weld metal and heat-affected zone (HAZ) retain the corrosion resistance, strength, and toughness of the base metal. The welding of 2205 is not difficult, but it is necessary to design welding procedures that lead to a favorable phase balance after welding and will avoid precipitation of detrimental intermetallic or nonmetallic phases.


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