UNS S32750|1.4410|2507 Seamless Super Duplex Steel Pipe

Seamless Super Duplex Steel S32750 Pipes (UNS S32750 / F53 / Alloy 2507) are high-integrity piping solutions engineered with a balanced austenitic-ferritic microstructure for extreme durability. As a premier manufacturer based in Wenzhou, China, XinZhe produces precision-engineered seamless tubing that strictly complies with ASTM A790, ASME SA790, and NORSOK M650 international standards.

Designed for the most aggressive environments, our S32750 pipes are optimized to achieve a high Pitting Resistance Equivalent Number (PREN ≥ 41). This superior threshold ensures exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC) in hot seawater and sour gas services. With a yield strength significantly higher than conventional austenitic stainless steels, these pipes enable lighter wall designs and enhanced pressure ratings for mission-critical reliability. Through advanced cold-drawing and specialized solution annealing, XinZhe ensures every pipe maintains optimal phase balance and a high-integrity surface finish.

Technical Note: Our S32750 ensures PREN = %Cr + 3.3X%Mo + 16 X%N ≥41

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What Is UNS S32750 Seamless Pipe?

UNS S32750 Seamless Super Duplex Pipe Overview

UNS S32750 seamless pipe (F53 / Alloy 2507 / EN 1.4410) is a super duplex stainless steel pipe designed for high mechanical strength and resistance to pitting, crevice corrosion and chloride-induced stress-corrosion cracking. Seamless construction is commonly selected where pressure integrity and uniform wall structure are important.

Product item	Technical information
Product	UNS S32750 seamless super duplex stainless steel pipe
Alternative designation	F53 / Alloy 2507 / EN 1.4410
Primary standards	ASTM A790 / ASME SA790; project requirements subject to review
Key alloy feature	High chromium, molybdenum and nitrogen; PREN is commonly specified at 40 or above
Typical service	Offshore oil and gas, desalination, seawater, chemical processing and high-chloride systems
Supply basis	Grade, OD, wall thickness, length or schedule, heat treatment and inspection requirements

Chemical Composition of UNS S32750

Values below are an engineering reference. Contractual limits must follow the governing standard, edition and purchase order.

Grade	C	Mn	P	S	Si	Ni	Cr	Mo	N	Cu / W
S32750	≤0.03	≤1.20	≤0.035	≤0.020	≤0.80	6.00–8.00	24.00–26.00	3.00–5.00	0.24–0.32	≤0.50 Cu

Mechanical Property Reference

	Tensile strength	Yield strength	Elongation	Hardness
Reference value	≥800 MPa	≥550 MPa	≥25%	≤290 HBW
Procurement note	Indicative product data; verify acceptance values against the applicable standard and MTC.	Confirm the required product condition and wall thickness.	Test requirements depend on the governing specification.	Use the ordered standard and project limits.

Manufacturing, Testing and Documentation

Item	Available scope
Manufacturing route	Hot piercing or extrusion, cold drawing/pilgering where required, solution annealing, straightening and finishing
Dimensional control	OD, wall thickness, length, straightness and surface inspection against the purchase specification
Integrity testing	Hydrostatic or nondestructive electric testing; UT or eddy-current testing when specified and applicable
Documents	Material Test Certificate, chemical and mechanical results, dimensional report and additional inspection records as ordered
Optional verification	PMI, corrosion testing and third-party inspection subject to technical and contractual review

Typical Applications

Industry	Typical equipment or service	Selection focus
Offshore oil and gas	Flowlines, risers and process piping	High strength and chloride resistance
Desalination	High-pressure RO and seawater piping	Resistance to localized corrosion
Chemical processing	Chloride-bearing process systems	Pitting and crevice-corrosion resistance
Marine engineering	Cooling-water and seawater systems	Durability in saline environments

Super Duplex Grade Comparison

Grade	Key distinction	Typical selection focus
S32550	Copper-bearing Ferralium 255	Acidic chemical and seawater duties
S32750	Widely specified Alloy 2507 / F53	Offshore, desalination and chloride service
S32760	Tungsten- and copper-alloyed F55	Severe offshore and erosive service
S32950	Higher chromium, leaner molybdenum range	Selected industrial chloride environments

Information Required for a Quotation

Requirement	Information to specify
Material	UNS S32750 and governing standard
Dimensions	OD × wall thickness × length or NPS × schedule
Quantity	Number of pieces or total weight
Condition	Heat treatment, surface finish, ends and packing
Inspection	MTC, NDT, PMI, corrosion testing or third-party inspection
Logistics	Destination and required delivery date

Frequently Asked Questions

What is UNS S32750 seamless pipe?

UNS S32750, also known as Alloy 2507 or F53, is a 25% chromium super duplex stainless steel used where high strength and strong resistance to chloride-induced localized corrosion are required.

Which standard is commonly specified?

ASTM A790 / ASME SA790 is commonly used for seamless and welded ferritic-austenitic stainless steel pipe. State the exact edition, dimensions and supplementary requirements in the purchase order.

What information is needed for quotation?

Send the grade, standard, OD, wall thickness, length, quantity, delivery condition, inspection requirements and destination for technical review.

See the complete Super Duplex Stainless Steel Seamless Pipe range. Final availability, testing scope and compliance are subject to formal review of the standard, drawing and purchase order.

Ready to Request a Quotation?

Send your UNS S32750 Seamless Pipe enquiry with grade, applicable ASTM/ASME standard and edition, OD × wall thickness, length, quantity, end finish, delivery destination and inspection documents — you will get a written quotation stating the specification and edition, delivery condition, documents included and lead time.

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