UNS S32950 Spool

Manufacturer, Supplier & Exporter of UNS S32950 Spool

UNS S32950 is a high-performance super duplex stainless steel grade engineered for extremely demanding process environments where resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking is essential. The alloy is known for its outstanding mechanical strength, balanced duplex microstructure, and long-term durability under fluctuating temperatures and pressures. Because of these enhanced metallurgical properties, UNS S32950 is widely used for precision-fabricated spools and high-integrity tubes deployed in offshore platforms, subsea equipment, desalination units, petrochemical plants, and aggressive chemical service applications. Its superior chromium, molybdenum, and nitrogen content provides much higher corrosion resistance compared to standard 300-series stainless steels or even regular duplex grades...

Riddhi Siddhi Impex has established itself as a recognized manufacturer, stockist, and supplier of UNS S32950 spools and tubes, offering customized spooled pipe assemblies, seamless and welded tubes, fabricated spools, and machined components tailored to customer drawings. The company focuses on precision fabrication, strict quality control, and adherence to international material standards. Their manufacturing capabilities include CNC-machined fittings, automated welding for spool fabrication, hydrotesting, non-destructive testing (NDT), PMI verification, and dimensional inspection. Each UNS S32950 spool or tube is supplied with proper heat traceability and relevant test certificates, making their products suitable for critical engineering projects.

As a major domestic supplier across India, Riddhi Siddhi Impex supplies UNS S32950 spools and tubes to a vast network of industries located in key cities such as Mumbai, Delhi, Bengaluru (Bangalore), Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru (Mysore), Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, Nashik, Kolhapur, Chandrapur, Akola, Vilayat, Somnath, Dahej, Ankleshwar, Navsari, Valsad, Narmada and Rajpipla. Their pan-India supply chain makes it easy for industries to procure the alloy without facing delays, import hurdles, or long lead times..

The superiority of UNS S32950 in spool fabrication lies in its duplex microstructure, which combines the toughness of austenite with the strength and corrosion resistance of ferrite. This structural balance ensures excellent performance in piping spools used for seawater injection lines, high-salinity brine transfer, hydrocarbon handling, and high-pressure chemical flow systems. Riddhi Siddhi Impex ensures that each spool undergoes solution annealing, beveling, welding, forming, and heat-treatment processes according to application requirements. This guarantees that the final product offers reliable performance under high loads, mechanical vibrations, and corrosive media...

For tubes—whether seamless or welded—UNS S32950 provides an exceptional combination of high yield strength, elevated tensile strength, and impressive elongation. These properties make the tubes suitable for heat exchangers, condensers, evaporators, instrumentation piping, and structural members in corrosive industrial atmospheres. The company supplies tubes in various outer diameters, wall thicknesses, and lengths, supporting metric and imperial standards. Clients can request mirror-polished tubes, pickled & passivated tubes, annealed tubes, long-radius coils, U-tubes, and specially cut lengths depending on process demands..

Specification

Product Name	UNS S32950 Spool
Manufacturer	Riddhi Siddhi Impex
Material Grade	Duplex Stainless Steel UNS S32950
Standard	ASTM A789 / A790 / ASME SA789 / SA790
Size Range	1/8” to 2” (Custom Sizes Available)
Spool Length	Up to 1000 meters (Custom Lengths)
Form	Coiled Spool, Precision Wound Spool
End Finish	Plain, Beveled, Threaded
Applications	Chemical Injection Lines, Marine Systems, Offshore Equipment, Desalination Plants, Hydraulic Tubing

Chemical Composition

Element	Content (%)
Chromium (Cr)	24.0 – 26.0
Nickel (Ni)	5.0 – 8.0
Molybdenum (Mo)	1.0 – 3.0
Manganese (Mn)	1.0 Max
Silicon (Si)	1.0 Max
Nitrogen (N)	0.10 – 0.20
Carbon (C)	0.03 Max

Mechanical Properties

Property	Value
Tensile Strength	≥ 700 MPa
Yield Strength (0.2%)	≥ 450 MPa
Elongation	≥ 25%
Hardness	≤ 290 HB
Impact Toughness	Excellent at Low Temperatures

Dimension Chart (Nominal)

Size (Inch)	Outside Diameter (mm)	Wall Thickness (mm)	Spool Length
1/8"	3.18	0.89	Up to 1000 m
1/4"	6.35	1.24	Up to 800 m
3/8"	9.52	1.50
1/2"	12.7	1.65	Up to 400 m
1"	25.4	2.77	Up to 200 m

Equivalent Grades

Standard	Equivalent Grade
UNS	S32950
EN	1.4595
WNR	1.4595
ASTM	A789 / A790

Equivalent Standards

Standard	Description
ASTM A789	Seamless & Welded Duplex Steel Tubes
ASTM A790	Duplex Stainless Steel Pipe Specifications
ASME SA789 / SA790	Pressure Vessel Grade Duplex Tubing
NACE MR0175	Sour Service Material Requirements

Other Types of Duplex Steel Spools

Type	Description
UNS S31803 Spool	Standard duplex grade for chemical & marine use
UNS S32205 Spool	High-strength duplex grade with improved corrosion resistance
UNS S32550 Spool	Super duplex grade for aggressive environments
UNS S32750 Spool	Excellent pitting resistance for offshore systems

In addition to manufacturing, Riddhi Siddhi Impex provides deep technical support to customers regarding material selection, corrosion consulting, welding recommendations, spool layout optimization, and project-specific documentation. This technical guidance is especially valuable for EPC contractors, plant manufacturers, consultants, refinery engineers, and maintenance teams planning shutdown upgrades. UNS S32950’s higher PREN (Pitting Resistance Equivalent Number) gives it a strong advantage, and the company ensures the material is selected correctly against the chloride content, temperature, and pressure of the operating environment..

Q1: What are the applications of UNS S32950 Spool?

A1: UNS S32950 Spools are widely used in offshore platforms, chemical injection systems, desalination plants, hydraulic systems, oil & gas processing units, and various marine engineering applications due to their superior corrosion resistance and high strength.

Q2: Do you offer custom spool lengths and sizes?

A2: Yes, Riddhi Siddhi Impex offers fully customized spool sizes, including specific outside diameters, wall thicknesses, lengths, and end connections based on detailed project requirements or customer drawings.

Q3: Is UNS S32950 corrosion-resistant?

A3: Absolutely. UNS S32950 provides excellent resistance to pitting, crevice corrosion, and chloride stress corrosion cracking, making it ideal for highly saline, acidic, and chemically aggressive service environments.

Q4: Do you supply UNS S32950 Spool across India?

A4: Yes, Riddhi Siddhi Impex supplies UNS S32950 Spools across all major Indian cities such as Mumbai, Delhi, Chennai, Bengaluru, Hyderabad, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Indore, Bhopal, Visakhapatnam, Coimbatore, Kochi, Mangalore, and other key industrial regions.