Chintamani Stainless Incs is well-known supplier, manufacturer and exporter of Duplex S31083 / S32205 Flanges with high quality raw materials. We follow long procedure of Duplex Steel UNS S31803 Blind Flanges quality control, under which we carefully assess all our products on the basis of quality parameters. Our offered ASME SA182 Duplex Steel UNS S32205 Weld Neck Flanges are supply to sea water and power generation equipment as their smooth surfaces can endure a temperature up to 600 ° F besides promoting excellent flow characteristics.

Duplex Steel DIN 1.4462 Socket Weld Flanges demonstrate good fatigue strength, as well as outstanding resistance to stress corrosion cracking, crevice, pitting, erosion, and general corrosion in severe environments. As a referred stockholder we have huge inventory of Duplex Steel ASTM A182 Flanges include Duplex Steel S31803 Weld Neck Flanges, Duplex 2205 Slip On Flanges, Duplex F51 Socket Weld Flanges,Duplex Steel F56 Orifice Flanges, Gr. F52 Duplex Blind Flanges, Duplex Steel S32205 Spectacle Blind Flanges, Duplex Steel F60 Screwed / Threaded Flanges, Duplex 2205 Ring Type Joint Flanges (RTJ), Duplex Steel F61 Reducing Flanges etc.

The 2205 Duplex Steel consists of a two-phase microstructure, which is ferritic and austenitic. Talking about the chemical composition of 2205 Duplex Steel Flanges, they mainly contain 22% chromium, 3% molybdenum, and 5-6% nickel, present in the form of alloyed stainless steel. We are one of the top Duplex Steel Flanges Manufacturers In India who produces different types of flanges of the given grade according to the needs of our clients. As a result, we have a good stock of various Duplex Stainless Steel Flanges, known for their high yield strength- almost double than the standard austenitic stainless steel grade.
We are one of the biggest producers of Duplex Steel Slip On Flanges that have good fatigue strength and are highly resistive to corrosion. The 2205 Duplex Steel Blind Flange is also known for its various mechanical properties, such as excellent resistance to cracking, pitting, erosion, and that too in severe environments. Our high-quality Duplex Weld Neck Flanges have applications in various industries like chemical, transportation, and storage. We are amongst the biggest stockists of ASTM A182 Duplex Steel Threaded Flanges in India, which possess good weldable properties. All of our products are supplied to different parts of the world, and we have many happy clients. We offer product delivery to your doorstep.
Flanges constructed from UNS S32205, also called Duplex 2205, possess remarkable attributes derived from their distinct composition. These duplex stainless steel components are made from a 50/50 blend of ferrite and austenite, giving them a dual-phase structure that confers various beneficial characteristics. Foremost among these is an extraordinary corrosion resistance. The flanges' chemical composition, which includes substantial quantities of chromium, molybdenum, and nitrogen, fosters the formation of a protective layer on their surface. This shields the flanges from various corrosion types, including general, pitting, crevice corrosion, and stress corrosion cracking.

Equivalent Grade Of SAF 2205 Duplex Stainless Steel

Duplex 2205/UNS S3205 / UNS31803 / EN 1.4462 Blind Flanges Dimensions Chart

Duplex Stainless Steel Flange Pressure Rating

ASTM A182 Duplex Steel 2205 Flanges Schedule Chart

Duplex Stainless Steel Flanges Size Chart

Duplex 2205/UNS S3205 / UNS31803 / EN 1.4462 Flange Chemical Composition

Mechanical Properties Of DDuplex 2205/UNS S3205 / UNS31803 / EN 1.4462 Flange

Grades	Melting Point (°F)	Density (lb/in 3)	Density (g/cm 3)	Melting Point (°C)
S31803 / S32205	2588 – 2669	0.285	7.805	1420 – 1465

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
2507	1.4410	2507	S32750	43	20	550	D	0.02	25.0	7.0	4.0	0.27

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)
Duplex 2507 2507 (EN 1.4410/UNS S32750) A super duplex product with higher corrosion resistance and mechanical strength than Forta DX 2205. Often used in extremely corrosive environments.	• Desalination plants • Industrial piping • Scrubbers • Oil and gas industry, typically tubular products, flanges,fittings and valves • Deep-sea pipelines	• Cold rolled coil and sheet • Hot rolled coil and sheet • Quarto plate • Bar • Wire rod • Semi-finished (bloom, billet, ingot & slab)
Duplex 32760 100 (EN 1.4501/UNS S32760) A super duplex product with higher corrosion resistance and mechanical strength than Forta DX 2205. Often used in extremely corrosive environments.	• Desalination plants • Industrial piping • Scrubbers • Oil and gas industry, typically tubular products, flanges, fittings and valves • Deep-sea pipelines	• 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.

Corrosion resistance

• Uniform Corrosion: Due to high chromium content, these steels resist uniform corrosion well, typically less than 0.1 mm/year.
• Sulfuric Acid: DX 2205 shows superior resistance in sulfuric acid contaminated by chloride ions compared to Supra 316L/4404.
• Hydrochloric Acid: SDX 2507 and DX 2205 can be used in dilute hydrochloric acid, with potential risks of localized corrosion in crevices.
• Nitric Acid: LDX 2101 and DX 2304, with their high chromium content and low molybdenum, are suitable for environments where resistance to strongly oxidizing nitric acid is needed.

PRE values for Forta Duplex grades and some austenitic grades

Steel designations				PRE
name	EN	ASTM Type	UNS
2205	1.4462	2205	S32205	35
2507	1.4410	2507	S32750	43

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
2507	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	–
2507	1.4410	S32750	Cold rolled coil (C)	550	750–1000	20	20
			Hot rolled coil (H)	530	750–1000	20	20
			Quarto plate (P)	530	730–930	20	20
			Bar	530	730–930	25	–
	1.4510	S32760	Cold rolled coil (C)	550	750–1000	20	20
			Hot rolled coil (H)	530	750–1000	25	25
			Quarto plate (P)	530	730–930	25	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	–
2507	1.4410	S32750	Plate, sheet and strip	550	80	795	116	15
100	1.4501	S32760	Plate, sheet and strip	550	80	750	108	25

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
2507	Tensile strength	Rm [MPa]	680	660	640	630

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
2507	1.4410	2507	S32750	7.8	200	13.0	15	500	0.8
100	1.4410	-	S32760	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
2507	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
2507	1.4462	2205	S32205	22 9 3 NL
2507	1.4410	2507	S32750	25 9 4 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
2507	1.4410	2507	S32750	43	20	550	D	0.02	25.0	7.0	4.0	0.27