Duplex Fittings

Chintamani Stainless Inc is ISO 9001:2008 certified manufacturer, supplier and exporter of Duplex fitings in India and worldwide. Duplex Steel fitings 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 fitings has better corrosion resistance and higher strength than austenitic stainless steel fitings.

Duplex Steel Fittings are used in piping systems to connect pipes together. The fittings range in type, size and dimensions. Chintamani Stainless Incs is a leading supplier and manufacturer of the Duplex SS Fittings. The duplexs steel is special in that it has austenitic and ferritic steel phases in its metallurgic microstructure. This allows for the fitting to withstand corrosion and to have strength. There are different types of Duplex Pipe Fittings such as elbows, bends, unions, couplings, crosses and tees. All these fitting are used in different application requirements.
There are different grades of duplexs steel based on the material composition. The Duplex 2205 Pipe Fittings are the most used of duplexs in terms of the grade. The material is cost effective and has optimum pressure, temperature and strength capabilities compared to the other duplexs steel grades. There are lean duplexs and super duplexs grades of fitting in addition to the standard duplexs ones. The ASTM A815 Duplex Fittings belong to a specification that covers duplexs and super duplexs grades of fitting that are used in pulp and paper industry, bleaching equipment and other high temperature services.
The Duplex stainless steel pipe fittings are also used in a variety of other fitting. The applications include sea water, marine and other crucial industrial applications. The Duplex Steel S31803 Pipe Fittings can come in different sizes based on the standards. The usual nominal bore sizes are from ½ inches through 48 inches. Duplex Steel 32205 Fittings manufacturer in india have good high toxic resistance. Please feel free to contact us for more information on the UNS S32205 duplex fittings and their prices. Duplex Steel UNS S31803 Buttweld Fittings are piping components made from Duplex Stainless Steel UNS S31803, a dual-phase stainless steel alloy. These fittings are designed to connect or join sections of piping together in a leak-free and secure manner.
Duplex Steel UNS S31803 offers unique properties compared to other stainless steel grades for buttweld fittings. It has higher strength, hardness, and wear resistance compared to austenitic stainless steels like 304 and 316. However, it exhibits lower corrosion resistance in aggressive environments compared to these grades. The choice of stainless steel grade depends on the specific application requirements, considering factors such as corrosion resistance, strength, and operating conditions.

A fitting is used to change the direction of the pipe. The simplest way to do it is to bend the pipe. However, it will stretch and thin out the outer walls of the pipe. It will also thicken the inner wall of the pipe. 2205 duplex stainless steel fittings are renowned for having austenitic and ferritic microstructures. They display the properties of both classes. Improved localized corrosion resistance is displayed by ASME SA815 Duplex Steel Butt Weld Pipe Fittings when compared to 316 and 317 grades.

Ordinary steel fittings are sensitive to chloride stress corrosion cracking. However, ASME SA815 Duplex Pipe Reducers are better as they restrain deformities and avoid corrosion cracking even under high temperatures. UNS S31803 Duplex Steel Tee is said to have amazing toxic resistance and elasticity due to which they are used in the gas desulfurization industry. WERKSTOFF NR. 1.4462 End Cap have high resistance to intergranular corrosion and are therefore used in terminating connections.

Duplex S31803 Stainless Steel Buttweld Fittings are used in desalination, Boiler manufacturers, and brewing tanks. They are usually lower in cost and have a lower percentage of alloying elements. They are available in ASTM A 815. A812, and ASME SA 815, SA 812 specifications. We at Victor Steel provide Duplex 2205 Pipe Fittings as per the specific requirements of our customers in various sizes and with different pressure ratings. Customer satisfaction is our top priority. Also, we are one of the few manufacturers in India that can weld, form, and bend these duplex stainless steel fittings in different sizes and shapes.

Specification

Specifications	ASTM A815 and ASME SA815
Size Range	Welded Fittings: 1/2 – 48 Inch Seamless Fittings: 1/2 – 10 Inch
Type	DN15 to DN1200
Connection	Welding
Radius of bending	10D, 2D, 3D, 1D, 8D, 5D, 6D,
Manufacturing process	Forge, Cast, Press, Push
Thickness	SCH80, XS, STD, XXS, SCH100, SCH30, SCH20, SCH160, SCH60, SCH40, SCH120, SCH140, SCH10
Pressure Ratings	2000#, 6000#, 150#, 3000#, 9000#
End Connections	Socket weld / Threaded
Duplex 2205 Pipe Fittings manufacturer	90º Elbows, Tee, Pipe Cap, 45º Elbows, Crosses, Stub End, Pipe Bend, Reducers
Dimensions	ASME B16.28, ASME/ANSI B16.9, BS4504, MSS-SP-43, BS1560, BS10
Elbows	Angle = 2D, 3D, 1.5D, 5D, 2.5D, 1D, 6D, 4D, 7D-40D Standard = JISB2312, 22.5 deg, DIN2605, JISB2313, 30deg, ASME B16.9, MSS SP-75, 180 deg, 45 deg, JISB2311 BS, 90 deg, GB ISO
Test Certificates	Raw Materials Certificate EN 10204/3.1B Third Party Inspection Report, etc
Origin & Mills	USA, Japanese, Indian, Korean, European, Russian, Ukraine,

Equivalent of ASTM A815 DSS Pipe Elbow

STANDARD	WERKSTOFF NR.	UNS
Duplex 2205	1.4462	S31803 / S32205

Duplex Steel Pipe Bend Pressure Ratings

---

NPS (inch)	Pipe Sch.	Wall Thk. (in)	OD (inch)	Temperature
				100	200	300	400	500
				Allowable Stress (Pressure Rating)
				16700	16700	16700	15500	14400
1"	40	0.133	1.315	2205	2205	2205	2047	1902
	80	0.179	1.315	3061	3061	3061	2841	2640
	160	0.250	1.315	4493	4493	4493	4170	3874
1 1/2"	40	0.145	1.900	1629	1629	1629	1512	1404
	80	0.200	1.900	2303	2303	2303	2138	1986
	160	0.281	1.900	3362	3362	3362	3120	2899
2"	40	0.154	2.375	1371	1371	1371	1272	1182
	80	0.218	2.375	1985	1985	1985	1843	1712
	160	0.344	2.375	3283	3283	3283	3047	2831
3"	40	0.216	3.500	1301	1301	1301	1208	1122
	80	0.300	3.500	1844	1844	1844	1712	1590
	160	0.438	3.500	2787	2787	2787	2587	2403
4"	40	0.237	4.500	1102	1102	1102	1023	950
	80	0.337	4.500	1596	1596	1596	1482	1377
	160	0.531	4.500	2611	2611	2611	2424	2552
5"	40	0.258	5.563	965	965	965	896	832
	80	0.375	5.563	1428	1428	1428	1325	1231
	160	0.625	5.563	2474	2474	2474	2296	2133
6"	40	0.280	6.625	877	877	877	814	756
	80	0.432	6.625	1379	1379	1379	1280	1189
	160	0.719	6.625	2382	2382	2382	2211	2054
8"	40	0.322	8.625	771	771	771	716	665
	80	0.500	8.625	1218	1218	1218	1131	1050
	160	0.906	8.625	2298	2298	2298	2133	1982
10"	40	0.365	10.750	699	699	699	649	603
	80	0.594	10.750	1159	1159	1159	1075	999
	160	1.125	10.750	2289	2289	2289	2124	1974

EQUIVALENT GRADE OF DUPLEX STEEL S31803 / S32205 PIPE FITTING

STANDARD	UNS	WNR.
Duplex 2205	S31803/S32205	1.4462

DUPLEX STEEL UNS S32205 THREADED / SCREWED FITTINGS TOLERANCE

UNS S32205 Pipe Fittings Tolerance				90 Deg And 45 Deg Elbows And Pipe Tee	Reducer (Concentric/ Eccentric) & Lap Joint Stub End (Long / Short)	Pipe End Caps
Normal Pipe Size (NPS) Of ASME B16.9	O. (Outside) D. (Daimeter) at Bevel	I. (Inside) D.(Daimeter) at End	Wall Thickness Of T	Center-to-End Dimension A ,C ,B	Over-all Length Of H	Over-all Length Of F
1/2 to 2-1/2	+0.06		Not less than 87.5% of nominal thickness	+/- 0.06	+/- 0.06	+/- 0.12
	-0.03
3 to 3-1/2	+/- 0.06	+/- 0.06		+/- 0.06	+/- 0.06	+/- 0.12
4	+/- 0.06	+/- 0.06		+/- 0.06	+/- 0.06	+/- 0.12
5 to 8	+/- 0.06	+/- 0.06		+/- 0.06	+/- 0.06	+/- 0.25
10 to 18	+0.16	+/- 0.12		+/- 0.09	+/- 0.09	+/- 0.25
	-0.12
20 to 24	+0.25	+/- 0.19		+/- 0.09	+/- 0.09	+/- 0.25
	-0.19
26 to 30	+0.25	+/- 0.19		+/- 0.12	+/- 0.19	+/- 0.38
	-0.19
32 to 48	+0.25	+/- 0.19		+/- 0.19	+/- 0.19	+/- 0.38
	-0.19

CHEMICAL COMPOSITION

Grade	Carbon	Manganese	Silicon	Phosphorus	Sulfur	Chromium	Molybdenum	Nickel	Nitrogen	Iron
S31803	0.030 Maximum	2.00 Maximum	1.00 Maximum	0.030 Maximum	0.020 Maximum	22.0 To 23.0	3.0 To 3.5	4.50 To 6.50	0.14 To 0.20	63.72 Minimum
S32205	0.030 Maximum	2.00 Maximum	1.00 Maximum	0.030 Maximum	0.020 Maximum	21.0 To 23.0	2.50 – 3.50	4.50 To 6.50	0.8 To 0.20	63.54 Minimum

MECHANICAL PROPERTIES

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

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