Chintamani Stainless Inc is ISO 9001:2008 certified manufacturer, supplier and exporter of Super Duplex Steel Pipes & Tubes in India and worldwide.This saf 2507 super duplex stainless steel tube has been engineered for applications requiring high tensile strength and corrosion resistance. The 2507 super duplex pipe, for example, is used in a variety of industries, including chemical refining and petrochemical applications, as well as seawater equipment.
Super Duplex 2507 Pipe is a stainless steel pipe with the main alloyants chromium, nickel, and molybdenum. As a result of its chemical composition in terms of its maximum alloyant content, this grade is also known as 25cr Super Duplex Pipe. This grade of duplex 2507 Stainless Steel Pipe is well-known for its outstanding tolerance to chloride ion stress-related corrosion cracking, which has been due to the alloy's duplex microstructure.
Duplex 2507 pipe is used in a variety of industries, including mechanical and structural components, injection and ballast water systems, corrosion-resistant parts, offshore platforms, heat exchangers, fire-fighting systems,oil and gas industry equipment, process and service water systems, desalination plants, high pressure RO-plant and seawater piping, high strength, suitable for chemical process industries.
Sa 789 Uns S32750 Pipe is a super duplex stainless steel pipe with 25% chromium, 4% molybdenum, and 7% nickel that is engineered for challenging applications requiring outstanding strength and corrosion resistance, such as chemical process, petrochemical, and seawater machinery.
A790 S32760 with reduced production costs when compared with equivalent austenitic and ferritic grades and with greater yield and tensile strength, SuperDuplex is a cost-effective option for the market, with lower processing costs as opposed to comparable austenitic and ferritic grades and higher yield and tensile power. It is possible that if SuperDuplex is used, content thicknesses for a project may be minimised, lowering costs without sacrificing efficiency. ASTM A790 UNS S32750 is a super duplex steel variant.

Specification

ASTM Specification	ASTM A 789/ ASME SA 789
Standard	JIS, TOCT, GB, AMS, EN, ASTM, AISI, SAE, ASME, DS, NF, DTD, DIN
ASTM A790 Super Duplex 2507 Welded Pipe Size	5.0 - 1219.2 mm
Super Duplex 2507 Seamless Pipe Size	4 to 219mm W. T.: 0.5 to 20mm
25cr Super Duplex EFW Pipe size	5.0 - 1219.2 mm
UNS S32750 Pipe Outer Diameter	6.00 mm OD up to 250 mm OD, Sizes up to 12” NB
WERKSTOFF NR. 1.4410 Pipe Schedule	SCH5, SCH140, SCH80, XS, SCH10, SCH10S, SCH80, XXS, SCH120, SCH60, SCH30, STD, SCH20, SCH40S, SCH160, SCH40
Swg & Bwg	10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg.
Finish	BA (Bright & Annealed), Polished, AP (Annealed & Pickled), NO.1, MF, 2B, NO.4, HL, BA, Mirror finish, 8K etc
Saf 2507 Pipe Length	Single Random, Standard & Cut length , Double Random Pipe
Super Duplex 2507 Seamless Tube Size	3.35 mm OD To 101.6 mm OD, 15 NB to 150 NB IN
Alloy 2507 Welded Tube Size	6.35 mm OD To 152 mm OD
wall thickness of Super Duplex 2507 tubing	(special/custom wall thicknesses available) 0.020" –0.220"
Form	Super Duplex 2507 Pipe are available in form of Square, Round, Rectangular, Hollow, Coiled, Hydraulic, Straight Pipes, Pan Cake Coils, “U” Shape etc.
End of Super Duplex 2507 Pipe	Beveled End, Plain End, Screwed ends, Treaded Pipe
Type of S32760 Pipe	ERW/ Seamless / Welded / EFW / CDW / Fabricated /CEW/ DOM Super Duplex 2507 Pipe
Application of Super Duplex 2507 Pipe	Gas Tube, Oil Tube, Boiler and Heatexchanger, Fluid Tube
Marking on UNS S32750 Pipe	All ASTM A790 Super Duplex 2507 Pipes are marked as follows: Grade, Standard, Thickness, OD, Heat No. (Or according to the customer’s request.), Length
Specialize in	Large Diameter Super Duplex 2507 Pipe Super Duplex 2507 Heat Exchanger & Condenser Tubes Super Duplex 2507 Capillary Tube & Other Odd Size
Value Added Service	Polish (Electro & Commercial) Annealed & Pickled Bending, Draw & Expansion as per required Size & Length, Machining Etc.
manufacturing Technique of Super Duplex 2507 Pipe	hot drawn, Cold drawn, solid solution, bright annealed, hot extruding
Test Certificate of 25cr Super Duplex Pipe	Laboratory Test Certificate from Govt. Approved Lab. Manufacturer Test Certificate   Under Third Party Inspection
Our stockyard of Super Duplex 2507 Pipe	Abu Dhabi, Pimpri-Chinchwad, Port-of-Spain, New Delhi, Gimhae-si, Calgary, Gujarat, Istanbul, Dammam, Hyderabad, Tehran, Ludhiana, India, Ankara, Bangalore, Chennai, Ranchi, Coimbatore, Mumbai, Baroda, Noida, Thiruvananthapuram, Ahvaz, Surat, Ahmedabad, Bengaluru, Gurgaon, Kuwait, Riyadh, Mexico Montreal, Perth, Muscat, Melbourne, Tau, Bogota, Sydney, Jamshedpur, Courbevoie, Karachi, Nagpur,Indore, Lagos, Kolkata, Santiago, Ernakulam, Manama, Vadodara, Caracas, Khobar, Rajkot, London, Janeiro, Howrah, Kanpur,
Material Test Certificates (MTC)	Third Party Inspection Report, Fumigation Certificates 100% Radiography Test Report, Heat Treatment Charts, Raw Materials Certificate Super Duplex 2507 Pipe HS Code Commercial Invoice, Form A for Generalized System of Preferences (GSP) Material Test Certificates (MTC) as per EN 10204/3.1B, EN 10204 3.1 and EN 10204 3.2
Super Duplex 2507 Pipe Dimension ANSI/ ASME B36.10, B36.19, B2.1 We can also thread, cut and groove UNS S32750 Pipe to meet your specifications.

Equivalent of ASTM A815 DSS Pipe Elbow

Alloy	UNS Designation	Werkstoff NR.	Specifications	AFNOR	Grade	1.4410
Super Duplex 2507	S32750	1.4410	A/SA789, A/SA790	Z3 CN 25.06 Az	F53	X2 Cr Ni MoN 25.7.4

CHEMICAL COMPOSITION

S32750 / S32760	C	N	P	Si	Mn	Mo	Ni	Cr	S	Other
	0.030	0.24/0.32	0.035	0.80	1.20	3.0/5.0	6.00/8.00	24.0/26.0	0.020	Cu:0.50

MECHANICAL PROPERTIES

S32750 / S32760	Density	Melting Point	Yield Strength (0.2%Offset)	Tensile Strength	Elongation
	7.8 g/cm3	1350 °C (2460 °F)	Psi – 80000 , MPa – 550	Psi – 116000 , MPa – 800	15 %

Size Range Of ASTM A790 Duplex 2205 Pipe

UNS S32205 Seamless Pipes are supplied according to ANSI/ ASME B36.19.
OD = Duplex 2205 Pipe outside diameter
WT = Duplex 2205 Pipe wall thickness

Super Duplex Stainless Steel Pipe Size Chart In Inches

1/8″ IPS(.405″ O.D.)	3 1/2″ IPS( 4.000″ O.D.)
SCH 40, 80	SCH 10, 40, 80, 160, XXH
1/4″ IPS(.540″ O.D.)	4″ IPS(4.500″ O.D.)
SCH 10, 40, 80	SCH 10, 40, 80, 160, XXH
3/8″ IPS(.675″ O.D.)	5″ IPS( 5.563″ O.D.)
SCH 10, 40, 80	SCH 10, 40, 80, 160, XXH
1/2″ IPS(.840″ O.D.)	6″ IPS(6.625″ O.D.)
SCH 5, 10, 40, 80, 160, XXH	SCH 5, 10, 40, 80, 120, 160, XXH
3/4″ IPS(1.050″ O.D.)	8 ” IPS(8.625″ O.D.)
SCH 10, 40, 80, 160, XXH	SCH 5, 10, 40, 80, 120, 160, XXH
1″ IPS:(1.315′ O.D.)	10″ IPS(10.750″ O.D.)
SCH 5, 10, 40, 80, 160, XXH	SCH 10, 20, 40, 80 (.500), TRUE 80(.500)
1-1/4″ IPS(1.660″ O.D.)	12″ IPS(12.750″ O.D.)
SCH 10, 40, 80, 160, XXH	SCH 10, 20, 40(.375), TRUE40(.406), SCH80(.500)
1-1/2″ IPS(1.900″ O.D.)	14″ IPS(14.000″ O.D.)
SCH 10, 40, 80, 160, XXH	SCH10 (.188), SCH40 (.375)
2″ IPS(2.375″ O.D.)	16″ IPS(16.000″ O.D.)
SCH 10, 40, 80, 160, XXH	SCH10(.188), SCH40(.375)
2 1/2″ IPS(2.875″ O.D.)	18″ IPS (18.000″ O.D.)
SCH 10, 40, 80, 160, XXH	SCH-40 (.375)
3″ IPS( 3.500″ O.D.)
SCH 5, 10, 40, 80, 160, XXH

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

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 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]
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]
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
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]
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]
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	1.4410	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

2507

1.4410

2507

S32750

43

20

550

D

0.02

25.0

7.0

4.0

0.27