Duplex Sheet Plate

Chintamani Stainless Inc is ISO 9001:2008 certified manufacturer, supplier and exporter of Duplex Steel Plates Stockist in India and worldwide. Duplex Steel Sheets made by Fe-Ni-Cr alloys consisting of ferritic-austenitic microstructure at room temperature. Super Duplex Steel Plates exhibit greater toughness and better weldability than ferritic stainless steel. ASTM A240 Duplex Steel Plate has better corrosion resistance and higher strength than austenitic stainless steel plates.
Duplex Plates are mostly used in chemical and petrochemical applications, in power plants due to their high resistance to localized corrosion as well as to their high strength and toughness. Duplex Steel Perforated Sheets applications should be limited to temperatures below 600° F. Meanwhile, these Super Duplex Plates are also being offered in different sizes and shapes to our customers. Duplex Coil is a combination of molybdenum, chromium, and nitrogen conveys the good resistance of 2205 to chloride pitting and crevice corrosion.

Duplex 2205/UNS S3205 / UNS31803 / EN 1.4462

UNS S31803/2205 is a duplex grade with a ferritic-austenitic microstructure. The alloy consists of around 40-50% ferrite in the annealed condition. The duplex microstructure has the high strength of the ferritic grades whilst retaining the corrosion resistance of the austenitic grades. It is not uncommon to see the metal used as a practical solution to chloride-induced stress cracking, which is the achilles’ heel of stainless steel. It has superior resistance to chloride pitting and crevice corrosion as compared to 317L stainless steel. The alloy has outstanding corrosion resistance to seawater and most concentrations of sulphuric acid. In addition, it is also resistant to sulphide stress corrosion cracking (sour-gas environments). The high quality and therefore performance of UNS S32205 is widely attributed to the high levels of chromium present as well as nitrogen and molybdenum.
Compared to ordinary austenitic steel, Duplex Steel 2205 Plate is a stronger austenite and ferrite steel. at comparison to regular austenitic steels, duplex stainless steels, such as ASTM A240 Duplex Steel 2205 Plate Material, are significantly more resistant to stress corrosion cracking and frequently retain good weldability at their thickest regions. 3% molybdenum, 22% chromium, 5-6% nickel, and high-stress resistance features characterize ASTM A240 Duplex 2205 Sheet, an alloyed stainless steel plate with exceptional oxidation resistance.

316L or 317L austenite stainless steel is less resistant to pitting and crevice corrosion. Nearly all of the corrosion resistance qualities are offered by alloy 2205 steel plate. In addition, it exhibits stronger heat expansion, corrosion, oxidation, and thermal conductivity than austenitic ones. DS Plates were created to address typical issues with 300 grade stainless steel corrosion. About 40–50% ferrite is produced by Duplex 2205 Cold Rolled Plate when it is annealed.Duplex alloys have the advantage of combining the advantageous characteristics of both ferritic and Austin alloys, namely ease of manufacture and corrosion resistance. The ASTM A240 Duplex 2205 Perforated Sheet should only be used at temperatures lower than 600 °F. High temperatures over an extended period of time will stainlessly inflate 2205

Duplex stainless steels are work-hardenable alloys with exceptional resistance to corrosion. They have a blend of ferrite and austenite phases in their microstructures. Duplex stainless steels thus exhibit qualities shared by ferritic and austenitic stainless steels. In comparison to pure austenitic and pure ferritic grades, this mix of characteristics may entail some compromise. Most of the time, duplex stainless steels are more durable than ferritic stainless steels. In certain instances, the strengths of duplex stainless steels can surpass those of austenitic stainless steels by twofold. Although duplex stainless steels are thought to be resistant to stress corrosion cracking, ferritic stainless steels are more resistant to this type of assault.

Specification Of Duplex Stainless Steel

Duplex Stainless Steel Sheet Plate ASTM Specifications

Duplex Stainless Steel Temperature Limit

Temperature Rating: 1020-1100°C/ 1868-2012°F

Duplex and Super Duplex Stainless Steel Metric Dimension

Duplex 2205 Specification

Properties of material 2205

• ASTM A 182, A 240, A 276, A 789, A 790, A 815
• UNS S31803, S32205
• NACE MR0175

2205 stainless steel grades	Industry Specifications	UNS
Duplex 2205 22Cr	ASME SA-182 (F60), SA-240, SA-798, SA-790, SA-815 ASTM A182 (F60), A240, A276, A479, A480, A798, A790,  A815, A928, A988 SAE J405	UNS S32205
Duplex 2205 22Cr	ASME SA-182 (F51), SA-240, SA-798, SA-790, SA-815 ASTM A182 (F51),A240, A276, A479, A789, A790, A815, A928,  A988 SAE J405	UNS S31803

 

Alloy 2205 ASTM Grade

Grade	2205 Seamless and welded tube and pipe	2205 Plate, sheet and strip	2205 Bar	2205 Forgings	2205 Flanges	2205 Fittings
Duplex 2205 / Avesta 2205 / Saf 2205 Duplex Stainless Steel	ASTM A789; A790 NFA 49-217	ASTM A240 EN 10088-2	ASTM A276 ASTM A479 EN 10088-3	ASTM A182	ASTM A182	ASTM A182, ASTM A815

Duplex 2205 equivalent

Duplex Stainless Steel Grade 2205	Alloy 2205 Uns Number	Old British		Euronorm		Swedish SS	Japanese JIS
		BS	En	No	Name
Duplex 2205 / Avesta 2205	S31803 / S32205	318S13	-	1.4462	X2CrNiMoN22-5-3	2377	SUS 329J3L

Characteristics of Duplex 2205

• Resistance to crevice corrosion & chloride pitting
• High resistance to chloride stress corrosion cracking
• Good sulfide stress corrosion resistance
• Good general corrosion resistance
• Good workability and weldability
• High Strength

Duplex 2205 UNS number

Duplex Alloy 2205

UNS S31803, UNS S32205

Duplex 2205/UNS S3205 / UNS31803 / EN 1.4462 Mechanical Property

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/UNS S3205 / UNS31803 / EN 1.4462 Chemical Composition

Cr	Ni	Mo	C	N	Mn	Si	P	S	Fe
22.0-23.0	4.50-6.50	3.00-3.50	.030 Max	0.14-0.20	2.00 Max	1.00 Max	.030 Max	.020 Max	Balance

2205 Stainless Steel grades are used for many industries, check below 2205 Stainless Steel Applications & uses:

Chemical Process	Pharmaceutical	Geothermal	Petrochemical	Sea Water	Oil & Gas
Biomass	Mining	Utilities	Nuclear Power	Solar Power	Storage tanks
Water Desalination	Reinforcement bars	Building and construction	LNG (Liquefied Natural Gas)	Water piping

General characteristics

Steel designations

Performance

Typical chemical composition, % by mass

name

EN

ASTM Type

UNS

PRE

A1) %

Rp0.2 MPa

Grade family

C

Cr

Ni

Mo

N

2205

1.4462

2205

S32205

35

20

500

D

0.02

22.4

5.7

3.1

0.17

2205 stainless steel grades	Industry Specifications	UNS
Duplex 2205 2205 (EN 1.4462/UNS S32205 & S31803) The most popular duplex product on the market. Offers very good resistance to uniform and localized corrosion and stress corrosion cracking in combination with high mechanical strength.	• Cargo tanks in chemical tankers • Pulp and paper industry applications such as digesters and process tanks • Oil and gas industry, typically tubular products, flanges, fittings and valves • Structural components in bridges	• Cold rolled coil and sheet • Hot rolled coil and sheet • Quarto plate • Bar • Wire rod • Semi-finished (bloom, billet, ingot & slab)

Performance

Elongation vs. corrosion resistance.

Elongation vs. Corrosion resistance

Strength vs. Corrosion resistance

Elongation vs. Corrosion resistance

Duplex stainless steels, known for their high chromium content, provide excellent corrosion resistance, particularly in uniform corrosion environments with rates below 0.1 mm/year. Forta DX 2205 shows superior resistance to chloride-contaminated sulfuric acid compared to traditional stainless steels like Supra 316L/4404, approaching the performance of Ultra 904L. In dilute hydrochloric acid, Forta SDX 2507 and similar high-alloyed duplex steels are suitable, though localized corrosion risks exist around crevices even within safe usage limits.

PRE values for Forta Duplex grades and some austenitic grades

Steel designations				PRE
name	EN	ASTM Type	UNS
2205	1.4462	2205	S32205	35

Results from stress corrosion cracking immersion tests in chloride solutions

name	ASTM G123		ASTM G36
	25% NaCl, pH 1.5, 106°C (b.p.), 1,000 h	40% CaCl2, 100°C, 500 h	45% MgCl2, 155°C (b.p.), 24 h
	U-bend samples	4-PB samples (90% of Rp0.2)	U-bend samples
2205	No SCC	No SCC	SCC

Mechanical properties according to EN 10088 and EN 10028

	EN	ASTM	Product form	Yield strength	Tensile	Elongation	Elongation
name		UNS		Rp0.2[MPa]	strength	A[%]	A80[%]
				Rm[MPa]
2205	1.4462	S32205	Cold rolled coil (C)	500	700–950	20	20
			Hot rolled coil (H)	460	700–950	25	25
			Quarto plate (P)	460	640–840	25	25
			Wire rod 1)	510	750	35	–
			Bar	450	650–880	25	–

Mechanical properties according to ASTM A240

	EN	ASTM	Product form	Yield	Yield	Tensile	Tensile	Elongation
name		UNS		strength	strength	strength	strength	A50[%]
				Rp0.2[MPa]	Rp0.2 [ksi]	Rm [MPa]	Rm [ksi]
2205	1.4462	S32205	Plate, sheet and strip	450	65	655	95	25
			Wire rod 1)	510	74	752	109	–

Mechanical properties at elevated temperatures, minimum yield strength according to EN 10028-7

name	Strength		100°C	150°C	200°C	250°C
2205	Yield strength	Rp0.2 [MPa]	360	335	315	300
	Tensile strength	Rm [MPa]	590	570	550	540

Physical properties

Metric values according to EN 10088-1

name	EN	ASTM Type	UNS	Density [kg/dm3]	Modulus of elasticity at 20°C [GPa]	Coefficient of thermal expansion 20–100°C [10-6/K]	Thermal conductivity at 20°C [W/(m x K)]	Thermal capacity at 20°C [J/(kg x K)]	Electrical resistivity at 20°C [Ω x mm2/m]
2205	1.4462	2205	S32205	7.8	200	13.0	15	500	0.8

Imperial values converted from Table 10

name	Density [lbm/in3]	Modulus of elasticity [psi]	Coefficient of thermal expansion 68–212°F [μin / (in x °F)]	Thermal conductivity [Btu/(hr x ft x °F)]	Thermal capacity [Btu/(lbm x °F)]	Electrical resistivity [μΩ x in]
2205	0.282	29 x 106	7.2	8.7	0.119	31.50

Fabrication

Duplex stainless steel is suitable for all forming processes used for stainless steel. The high yield strength compared to austenitic and ferritic stainless steel can however give differences in forming behavior. Depending on the chosen forming technique there could be consequences, such as increased springback. This point is particularly relevant to the forming of any high strength steel. Moreover, an excellent interplay between high yield strength, work hardening rate and elongation promote the duplex grades for light weight and cost-efficient applications with complex shapes. The impact of the high strength varies for different forming techniques. Common for all is that the estimated forming forces will be higher than for the corresponding austenitic and ferritic stainless steel grades. This effect will usually be lower than expected from just the increase in strength since the choice of duplex stainless steel is often associated with gauge reduction. It is important to consider that duplex stainless steel may also be more demanding on the tools and on the lubricant. This should also be noted when looking to down gauge.

Welding consumables

name	EN	ASTM Type	UNS	Consumable ISO designation
2205	1.4462	2205	S32205	22 9 3 NL

General characteristics

Steel designations

Performance

Typical chemical composition, % by mass

name

EN

ASTM Type

UNS

PRE

A1) %

Rp0.2 MPa

Grade family

C

Cr

Ni

Mo

N

2205

1.4462

2205

S32205

35

20

500

D

0.02

22.4

5.7

3.1

0.17