Duplex Steel Flanges

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We are manufacturer of Raised Face or Flat Face duplex steel flanges.

Type of Cupro Nickel Flanges
Cupro/ Copper Nickel Slip-On Flanges	Cupro/ Copper Nickel Threaded Flanges
Cupro/ Copper Nickel Weld Neck Flanges	Cupro/ Copper Nickel Socket Weld Flanges
Cupro/ Copper Nickel Blind Flanges	Cupro/ Copper Nickel Reducing Flanges
Cupro/ Copper Nickel Lap Joint Flanges	Cupro/ Copper Nickel Plate Flanges

MICROTECH STAINLESS STEEL CO. is specialized in manufacturing and supplying of Duplex Steel Flanges, Flanges in Stainless steel, alloy Steel & carbon Steel since 1991, we manufacture wide range of Duplex Steel Flanges such as Duplex Steel Slip On Flangess, Duplex Steel Slip On Flanges, Duplex Steel Weld Neck Flanges, Duplex Steel pipe end Caps, Duplex Steel Pipe Bends etc. as per International standard like ASME/ASTM/API, we are supplying & exporting Duplex Steel Flanges in seamless & welded both forms to more than 60 countries for over 2 decades, we have our dealers & distributors in Nigeria, Australia, Malaysia, Egypt, South Africa, Tanzania, Kenya, Mozambique, Angola, Gabon Germany, Turkey, France, United Kingdom, Italy, Netherlands, Iran , Iraq , Saudi Arabia, United Arab Emirates , Iisrael, Jordan, Oman, Kuwait, Qatar, Bahrain, Bangladesh, China, Indonesia, South Korea, Pakistan, Philippines, Singapore, Sri Lanka, Thailand, Vietnam, Brazil, Colombia, Argentina & United States of America, MICROTECH STAINLESS STEEL CO. is the only company in INDIA which is approved Manufacturer & supplier of Duplex Steel Flanges in 300 top companies worldwide. Few of them are ORPIC, NIORDC, Saudi Aramco, SABIC, PIDMCO, GASCO, KNPC, Indian Oil, BPCL, HPCL, NTPC, BARC & Indian Navy, MICROTECH STAINLESS STEEL CO. is ISO 9001:2008, ISO 14001, OHSAS 18001 Certified Company since 2006 & PED approved Manufacturer since 2008, MICROTECH STAINLESS STEEL CO. is India's 6th largest Manufacturer, supplier & exporter of Duplex Steel Flanges.

Infrastructure :

MICROTECH STAINLESS STEEL CO. is 6th largest Duplex Steel Flanges & Flanges manufacturers in INDIA. we have following latest automated machines to manufacture Duplex Steel Flanges : Induction Slip On Flanges Making Machines, Bulge Forming Machine, Pipe Bending Machine, Slip On Flanges Cold Forming Machine, Induction Slip On Flanges Machine, Hydraulic Pressing Machine, Slip On Flanges and Pipe Bending Machine, Beveling Machine, we have largest Four-Column Hydraulic Press in INDIA which is used for pipe bending, pipe fitting press forming, metal sheet stretching and pulling. MICROTECH STAINLESS STEEL CO. corp . is INDIA's largest Engineering & Forging Company related to Petro-Chemical and Oil & Gas Industry.

Duplex Flanges

Duplex stainless steels have a mixed microstructure of austenite and ferrite, the aim being to produce a 50/50 mix, although in commercial alloys, the mix may be 40/60 respectively.

Duplex steels have improved strength over austenitic stainless steels and also improved resistance to localised corrosion, particularly pitting, crevice corrosion and stress corrosion cracking. They are characterised by high chromium (19–28%) and molybdenum (up to 5%) and lower nickel contents than austenitic stainless steels. The most used duplex stainless steel are the 2205 (22% Chromium, 5% Nickel) and the 2507 (25% Chromium, 7% Nickel); the 2507 is known as “super duplex” due to its higher resistance to corrosion.

The mechanical properties of Duplex steels are approximately double those of singular austenitic steels, and resistance to stress corrosion cracking is far superior to type 316 stainless steel in chloride solutions. Duplex material has ductile or brittle transition at approximately -50 degrees.

Duplex Steel Flanges Specificatins

Duplex Steel :	ASTM / ASME SA 815 UNS S31803, S32205, S32550, S32750, S32760
Super Duplex Steel :	ASTM / ASME SA 815 UNS S32750, UNS S32950
Size :	1/8" NB TO 24" NB. (Seamless & Welded)
Wall Thickness :	Sch. 5S To Sch. XXS
Also as per National & International Standard &Specification

Common Duplex Steel Flanges Specification :

	316T DESIGNATIONS				CHEMICAL COMPOSITION ASTM/EN STANDARDS (Major elements only)						Welding consumables
						% content is a maximum unless a range is indicated
	ASTM	EN	Trade Name	C	Mn	Cr	Ni	Mo	N	Other
Duplex	2304			0.03		21.5/24.5	3.0/5.5	0.1/0.6	0.05/0.2	0.05/0.6 Cu	2304/2205
		1.4362		0.03		22.0/24.0	3.5/5.5	0.1/0.6	0.05/0.2	0.1/0.6 Cu
	2101	1.4162		0.04	4.0	21.0	1.35	0.1	0.2
	2205			0.03		22.0/23.0	4.5/6.5	3.0/3.5	0.14/0.2		2205
		1.4462		O.03		21.0/23.0	4.5/6.5	2.5/3.5	0.10/0.22
	2507			0.03		24.0/26.0	6.0/8.0	3.0/5.0	0.24/0.35	1.5/2.5 Cu	2507
		1.441		0.03		24.0/26.0	6.0/8.0	3.0/4.5	0.2/0.35	1.0/2.5 Cu

Duplex Steel S31803 Flanges Specification :

Standard : ASME/ANSI B16.9, ASME B16.28, MSS-SP-43

Specifications : ASTM A815 / ASME SA815

Size : 1/2" to 24" NB to 24″NB in Sch 10S, 40S, 80S, 160s, XXS

Grade : UNS No. S31803, S32205, S32550, S32750, S32760.

Type : Seamless / Welded / Fabricated

ASTM A789 / ASTM 790 UNS S32205 | UNS S2550 | UNS S31803 | UNS S32750 | UNS S32760

Super Duplex
Alloy	Common Name	Related Specification
		European	UNS	ASTM/ASME
Alloy 255	Ferralium 255	1.4507	S32550	F61
Zeron 100	Zeron 100	1.4501	S32760	F55
Alloy 2507	SAF 2507	1.4410	S32750	F53