UNS S32760 Pipe

UNS S32760 is a 25% chromium super duplex stainless steel featuring a balanced 50/50 austenitic-ferritic dual-phase microstructure. Unlike standard 25% Cr super duplexes (such as UNS S32750 / Alloy 2507), S32760 includes deliberate alloying additions of both tungsten (W: 0.50–1.00%) and copper (Cu: 0.50–1.00%) alongside nitrogen and molybdenum. HT PIPE is a SS 32760 Pipe supplier with 15+ export experience. Contact us for more information and quotes for free!

S32760 Stainless Steel Seamless Pipe Specification

ASTM Specification	ASTM A790 ASME SA790
Standard	ASTM, ASME, JIS, AISI, AMS, EN, SAE, DIN, NF, TOCT, DS, DTD, GB
Seamless Pipe Size	0.5" NB To 8" NB
Swg & Bwg	12 Swg., 10 Swg., 16 Swg., 14 Swg., 20 Swg., 18 Swg.,
Schedule	XS, SCH30, SCH40, XXS, SCH80, SCH120, SCH60, SCH140, STD, SCH10, SCH10S, SCH40S, SCH80, SCH20, SCH5, SCH160
Length	Double Random, Single Random, Standard & Cut length Pipe
Finish	Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF, NO.1, NO.4, 2B, BA, HL, 8K, Mirror finish, etc
Type	Seamless
Pipe End	Plain End, Beveled End, Treaded Pipe, Screwed ends
Marking	Standard, Grade, OD, Thickness, Length, Heat No. (Or according to the customer's request.)
Application	Dairy Pipe, Oil Pipe, Gas Pipe, Fluid Pipe, Boiler Pipe for Chemical Industry
Value Added Service	Draw & Expansion as per required Size & Length, Polish (Electro & Commercial) Annealed & Pickled Bending, Machining Etc.
Specialize in	Large Diameter Duplex UNS S32760 Pipe

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Chemistry Breakdown & Significance

Element	Weight Percentage (%)
Chromium (Cr)	24.00 – 26.00
Nickel (Ni)	6.00 – 8.00
Molybdenum (Mo)	3.00 – 4.00
Tungsten (W)	0.50 – 1.00
Copper (Cu)	0.50 – 1.00
Nitrogen (N)	0.20 – 0.30
Iron (Fe)	Balance

 

Extreme Environment Resistance

Chloride Pitting and Crevice Corrosion: With a Critical Pitting Temperature (CPT) exceeding 50℃ per ASTM G48 Method C/E, S32760 pipes operate reliably in chlorinated seawater loops where standard 316L fails via localized attack.

 

Sour Service (H_2S Environments): Compliant with NACE MR0175 / ISO 15156-3, S32760 resists sulfide stress cracking (SSC) in subsea production headers and sour gas collection networks under specified partial pressures of H_2S.

 

Acidic Media Handling: The copper addition (0.5-1.0%) gives S32760 lower corrosion rates in sulfuric acid (H_2SO_4) and hydrochloric acid (HCl) circuits compared to tungsten-free super duplexes.

 

Manufacturing Specifications and Product Forms

S32760 piping systems are governed by stringent international ASTM, ASME, and EN standards. Fabrication routes vary between seamless (extruded/pilgered) and welded (EFW/GTAW) depending on nominal pipe size (NPS) and pressure rating.

Product Form	ASTM / ASME Standard	EN / ISO Equivalent	Common Sizes
Seamless Pipe	ASTM A790 / ASME SA790	EN 10216-5 (1.4501)	1/2" to 12" NPS (SCH 10S to SCH XXS)
Welded Pipe (EFW)	ASTM A790 / ASTM A928	EN 10217-7	$6" to 48" NPS (Custom Wall Thicknesses)
Wrought Fittings	ASTM A815 WP-S / WP-W	EN 10253-4	Elbows, Tees, Reducers (Matching NPS)
Forged Flanges	ASTM A182 Grade F55	EN 1092-1 Type 11	Class 150 to Class 2500 / API 10K

 

Technical Comparison: S32760 vs. Competing Alloys

To select the correct piping grade, contrast S32760 against other high-alloy materials:

Material Grade	UNS / Designation	PREN	Yield Strength (MPa)	Primary Advantage Over S32760
Duplex 2205	UNS S31803 / S32205	~35	~450	Lower initial material cost
Super Duplex 2507	UNS S32750	≥ 42	~550	Broader stock availability globally
Super Duplex S32760	UNS S32760 (Zeron 100)	≥ 40	≥550	Superior resistance to H_2SO_4 HCl & crevice corrosion
Super Austenitic 6% Mo	UNS S31254 (254 SMO)	~43	~300	Higher upper service temperature limit

 

 

 

 

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