S32101 Lean Duplex Stainless Steel Pipe ,Inconel 600 Nickel Alloy Tubes,Stainless Steel Profiles,TP310S pipe

Key Features of S32101 Lean Duplex Stainless Steel Pipe

Excellent Stress Corrosion Cracking Resistance:

Outstanding resistance to chloride-induced SCC, significantly outperforming 304 and 316L in chloride-containing environments, especially at elevated temperatures.

Ultra-High Mechanical Strength:

Minimum yield strength of ≥ 450 MPa (approximately three times that of 304/304L and even higher than S32304), allowing for significant wall thickness reduction, weight savings, and lower overall project costs.

Very Low Nickel Content – Maximum Cost Stability:

With nickel content of only 1.35–1.70% (compared to 8–10% for 304, 10–14% for 316, and 3.0–5.5% for S32304), S32101 offers the greatest price stability and lowest material cost among duplex grades.

Good Pitting and Crevice Corrosion Resistance:

PRE (Pitting Resistance Equivalent) ≥ 22, providing reliable service in environments with low to moderate chloride concentrations, comparable to 316 in many applications.

Excellent Weldability and Fabricability:

Maintains balanced ferrite/austenite ratio in the weld zone with proper welding procedures. Can be welded to austenitic grades and carbon steels using appropriate filler metals.

Good Low-Temperature Toughness:

Maintains adequate impact toughness down to -40°C, suitable for structural and transportation applications.

High Resistance to Wear and Abrasion:

Higher hardness and strength provide improved resistance to erosion, wear, and impact compared to austenitic stainless steels.

Cost-Effective Alternative to Carbon Steel with Coating:

Provides long-term corrosion resistance without the need for painting, coating, or cathodic protection, reducing lifecycle costs.

International Certification:

Pipes can be certified by ABS, BV, DNV, LR, GL, RINA, CCS, KR, and NK, and comply with international standards for structural and pressure applications.

S32101 Lean Duplex Stainless Steel Pipe Related International Standards and Grades

Womic Steel’s S32101 lean duplex pipes conform to multiple international specifications for structural, pressure, and corrosive service:

Standard	Description	Equivalent Grade / Material Number
ASTM A789 / A790	Seamless and welded ferritic/austenitic stainless steel pipe	S32101
ASTM A928	Welded ferritic/austenitic pipe for corrosive service	S32101
EN 10088	Stainless steels – general technical delivery conditions	1.4162 (X2CrMnNiN21-5-1)
EN 10216-5	Seamless stainless steel tubes for pressure purposes	1.4162
EN 10217-7	Welded stainless steel tubes for pressure purposes	1.4162
DIN 17458	Austenitic seamless tubes (duplex supplement)	X2CrMnNiN21-5-1
JIS G3459 / G3463	Stainless steel pipes for general and heat-resisting use	SUS329J1L (similar)
GB/T 21833	Seamless and welded duplex stainless steel pipes	022Cr21Mn5Ni2N
ISO 17781	Duplex stainless steel pipes for petroleum and natural gas industries	1.4162

These standards ensure that S32101 lean duplex pipes meet global requirements for chemical composition, balanced dual-phase microstructure, mechanical performance, testing, and dimensional accuracy.

Chemical Composition of S32101 Lean Duplex Stainless Steel Pipe

Element	C	Mn	P	S	Si	Cr	Ni	Mo	N	Cu
S32101	≤0.040	4.0–6.0	≤0.040	≤0.010	≤1.00	21.0–22.0	1.35–1.70	0.10–0.80	0.20–0.25	0.10–0.80

Note: S32101 (also known as LDX 2101) is a lean duplex grade with the lowest nickel content among commercial duplex stainless steels. Manganese (4.0–6.0%) and nitrogen (0.20–0.25%) are used to stabilize the austenite phase and provide strength, replacing the need for high nickel content. This unique composition delivers yield strength of 450–650 MPa (approximately three times that of 304) while maintaining good corrosion resistance and weldability. The very low nickel content provides exceptional price stability and makes S32101 highly resistant to nickel price volatility.

Pitting Resistance Equivalent (PRE) Calculation:
PRE = %Cr + 3.3 × %Mo + 16 × %N ≥ 22 (typically 22–25)

Comparison of PRE and Yield Strength:

Grade	PRE	Yield Strength (MPa)	Nickel Content (%)
304/304L	18–19	≥205	8.0–10.5
316/316L	24–26	≥170–205	10.0–14.0
S32304 (2304)	24–27	≥400	3.0–5.5
S32101 (2101)	22–25	≥450	1.35–1.70
S32205 (2205)	≥34	≥450	4.5–6.5

S32101 Lean Duplex Stainless Steel Pipe Mechanical Properties and Heat Treatment Requirements

Property	Unit	S32101
Tensile Strength (min)	MPa	≥650
Yield Strength (0.2% offset, min)	MPa	≥450
Elongation (min)	%	≥25
Hardness (Brinell, max)	HBW	≤290
Hardness (Rockwell C, max)	HRC	≤30
Density	g/cm³	7.80
Melting Range	°C	1350–1400

Impact Toughness (Charpy V-Notch, typical at -40°C):

Longitudinal: ≥ 60 J (typical)

Heat Treatment Condition:
S32101 lean duplex pipes are solution annealed at 980–1060°C followed by rapid cooling (water quenching or rapid air cooling) . This heat treatment:

1. Restores the balanced 40–60% ferrite / 40–60% austenite microstructure.

2. Dissolves unwanted intermetallic phases that can reduce corrosion resistance and toughness.

3. Relieves internal stresses from forming, rolling, or welding.

4. Ensures optimal mechanical properties and corrosion performance.

5. Note: S32101 has a similar solution annealing temperature range to S32304 (980–1060°C). However, due to its higher nitrogen and manganese content, S32101 achieves higher yield strength (≥450 MPa vs ≥400 MPa for S32304) while maintaining good ductility and impact toughness.

Delivery Condition: Pipes are normally supplied in solution annealed and pickled condition. Upon request, bright annealed or polished finishes can be provided for specific applications

Manufacturing Process of S32101 Lean Duplex Seamless Steel Pipe

Womic Steel adopts advanced production technology to ensure each S32101 lean duplex seamless pipe meets exact specifications with balanced microstructure and excellent surface quality.

1. Raw Material Selection: High-quality S32101 lean duplex billets from certified mills (Outokumpu, Baosteel, TISCO, POSCO) with certified chemical composition (including Mn and N verification) and ferrite/austenite balance.

2. Heating and Piercing: Billets heated to controlled temperature (lower than austenitic grades to prevent ferrite coarsening) and pierced using a rotary piercing mill.

3. Hot Rolling: Shells elongated and rolled to desired intermediate size with strict temperature control.

4. Cold Drawing / Cold Pilgering: Pipes refined to precise dimensions with improved surface finish and enhanced mechanical properties. S32101 work hardens rapidly, requiring intermediate annealing steps.

5. Solution Annealing: Heat treatment at 980–1060°C followed by rapid cooling to restore balanced duplex structure.

6. Pickling & Passivation: Removal of oxides and creation of passive film; standard pickling acids suitable for lean duplex grades.

7. Straightening and Dimensional Calibration: Ensures consistent roundness and wall uniformity.

8. Final Inspection & Marking: Each pipe tested (including ferrite content measurement), marked with grade, heat number, and standard before packing.

This process guarantees a balanced dual-phase microstructure, smooth internal bore, high structural integrity, and excellent corrosion resistance across all batches of Womic Steel’s S32101 Lean Duplex Seamless Pipe.

Manufacturing Process of S32101 Lean Duplex Welded Steel Pipe

Womic Steel utilizes state-of-the-art manufacturing technology to ensure every S32101 lean duplex welded pipe meets precise specifications with weld zone phase balance and excellent surface quality.

1. Raw Material Selection: High-quality S32101 lean duplex stainless steel strips/coils from certified suppliers with full traceability.

2. Slitting & Uncoiling: Precision slitting to required width; edge preparation to ensure clean, burr-free edges for welding.

3. Forming & Welding: The strip is progressively formed into a cylindrical shape. The edges are welded using advanced TIG or Plasma welding with:

Appropriate heat input control to prevent excessive ferrite in the weld zone

Shielding gas: Ar + N₂ (2–5% nitrogen) to prevent nitrogen loss

Matching filler metal or overmatching as required.

4. Weld Seam Treatment: External weld bead removal and optional internal bead control.

5. Solution Annealing: Full heat treatment of the entire welded pipe at 980–1060°C followed by rapid cooling – essential for restoring corrosion resistance and balanced microstructure in the weld and HAZ.

6. Sizing & Calibration: Final precise outer diameter and roundness.

7. Pickling & Passivation: Chemical treatment removes scale and promotes passive layer formation, including the weld zone.

8. Non-Destructive Testing (NDT) : Weld seam inspected using Eddy Current or Ultrasonic Testing.

9. Ferrite Content Measurement: Verification of weld and base metal phase balance (typically 35–65% ferrite).

10. Final Inspection & Marking: Complete dimensional check, visual inspection, and traceable marking.

This controlled process guarantees a sound weld seam, excellent dimensional accuracy, balanced duplex microstructure, and reliable corrosion resistance for every batch of Womic Steel’s S32101 Lean Duplex Welded Pipe.

S32101 Lean Duplex Stainless Steel Pipe Dimensions and Tolerances

Outside Diameter: 6mm – 1219mm (1/4″ – 48″)

Wall Thickness: 0.5mm – 40mm (SCH 5S – SCH XXS)

Length: Up to 12m (fixed or random); longer lengths available upon request

Tolerances: According to ASTM A999 / EN ISO 1127

ANSI B 36.19/ANSI B36.10 DIMENSIONS OF SEAMLESS &WELDED STAINLESS STEEL PIPE
Nominalsize		mm	ANSIB36.19				ANSIB36.10ANSIB36.10
DN	NPS	mm	5S	10S	40S	80S	10	20	30	STD	40	60	XS	80	100	120	140	160XXS
6	1/8"	10.29		1.24	1.73	2.41				1.73	1.73		2.41	2.41
8	1/4"	13.72		1.65	2.24	3.02				2.24	2.24		3.02	3.02
10	3/8"	17.15		1.65	2.31	3.20				2.31	2.31		3.20	3.20
15	1/2"	21.34	1.65	2.11	2.77	3.73				2.77	2.77		3.73	3.73				4.78	7.47
20	3/4"	26.67	1.65	2.11	2.87	3.91				2.87	2.87		3.91	3.91				5.56	7.82
25	1"	33.4	1.65	2.77	3.38	4.55				3.38	3.38		4.55	4.55				6.35	9.09
32	1 1/4"	42.16	1.65	2.77	3.56	4.85				3.56	3.56		4.85	4.85				6.35	9.70
40	1 1/2"	48.26	1.65	2.77	3.68	5.08				3.68	3.68		5.08	5.08				7.14	10.16
50	2"	60.33	1.65	2.77	3.91	5.54				3.91	3.91		5.54	5.54				8.74	11.07
65	2 1/2"	73.03	2.11	3.05	5.16	7.01				5.16	5.16		7.01	7.01				9.52	14.02
80	3"	88.9	2.11	3.05	5.49	7.62				5.49	5.49		7.62	7.62				11.13	15.24
90	3 1/2"	101.6	2.11	3.05	5.74	8.08				5.74	5.74		8.08	8.08
100	4"	114.3	2.11	3.05	6.02	8.56				6.02	6.02		8.56	8.56		11.13		13.50	17.12
125	5”	141.3	2.77	3.40	6.55	9.52				6.55	6.55		9.52	9.52		12.70		15.90	19.05
150	6"	168.28	2.77	3.40	7.11	10.97				7.11	7.11		10.97	10.97		14.30		18.20	21.95
200	8"	219.08	2.77	3.76	8.18	12.70		6.35	7.04	8.18	8.18	10.30	12.70	12.70	15.10	18.20	20.60	23.00	22.22
250	10"	273.05	3.40	4.19	9.27	12.70		6.35	7.80	9.27	9.27	12.70	12.70	15.09	18.26	21.44	25.40	28.58
300	12"	323.85	3.96	4.57	9.52	12.70		6.35	8.38	9.52	10.31	14.27	12.70	17.48	21.44	25.40	28.58	33.32
350	14"	355.6	3.98	4.78			6.35	7.92	9.52	9.52	11.13	15.09	12.70	19.05	23.83	27.79	31.75	35.71
400	16"	406.4	4.19	4.78			6.35	7.92	9.52	9.52	12.70	16.66	12.70	21.44	26.19	30.96	36.53	40.49
450	18"	459.2	4.19	4.78			6.35	7.92	11.13	9.52	14.27	19.05	12.70	23.83	29.36	34.92	39.67	45.24
500	20"	508	4.77	5.53			6.35	9.52	12.70	9.52	15.09	20.62	12.70	26.19	32.54	38.10	44.45	50.01
550	22"	558.8	4.77	5.53			6.35	9.52	12.70	9.52	15.87	22.22	12.70	28.57	34.92	41.27	47.62	53.97
600	24"	609.6	5.54	6.35			6.35	9.52	14.70	9.52	17.48	24.61	12.70	30.96	38.89	46.02	52.37	59.94
650	26"	660.4					7.92	12.70		9.52			12.70
700	28"	711.2					7.92	12.70	15.88	9.52			12.70
750	30"	762	6.35	7.92			7.92	12.70	15.88	9.52			12.70
800	32"	812.8					7.92	12.70	15.88	9.52			12.70

Surface Conditions of S32101 Lean Duplex Stainless Steel Pipe

Womic Steel offers a wide range of surface finishes to meet various industrial, structural, and architectural applications.

Surface Type	Description
Annealed & Pickled (AP Finish)	Standard industrial finish – matte, oxide-free after acid treatment. Suitable for most structural and industrial applications.
Bright Annealed (BA Finish)	Mirror-like surface obtained through controlled atmosphere annealing – available for smaller diameter pipes.
Polished Finish (180#, 240#, 320#, 400#, 600#)	Smooth mechanical finish suitable for decorative, architectural, and food processing applications.
Mirror Polished (8K)	Ultra-reflective surface for architectural and high-end design applications.
Brushed / Hairline Finish	Satin linear texture for handrails, furniture, and interior design.
Passivated Finish	Surface chemically treated to enhance corrosion protection.
Grit Blasted / Bead Blasted	Matte, uniform surface texture for structural and industrial environments – improves paint adhesion.
As-Welded (No Annealing)	Available for non-critical structural applications where full corrosion resistance is not required.

Each S32101 pipe surface is inspected for uniform appearance, absence of pits, and consistent finish quality.

Testing and Inspection of S32101 Lean Duplex Stainless Steel Pipe

Every S32101 lean duplex stainless steel pipe undergoes comprehensive inspection in accordance with ASTM, EN, and GB standards, including duplex-specific tests, to guarantee reliability and performance:

Test / Inspection	Description	Applicability
Visual & Dimensional Inspection	Surface, roundness, wall thickness, straightness, and end preparation	100%
Hydrostatic Pressure Test	Leakage and pressure resistance verification	100%
Eddy Current Test (ECT)	Surface and sub-surface imperfection detection	100% (seamless)
Ultrasonic Test (UT)	Internal integrity of pipe wall and weld seam	100%
Positive Material Identification (PMI)	Confirms correct chemical grade (Cr, Ni, Mo, Mn, N verification)	100%
Ferrite Content Measurement	Magnetic induction or metallographic method – requirement: 35–65% ferrite	100%
Microstructure Examination	Verification of balanced dual-phase structure, absence of intermetallic phases	Per heat / batch
Tensile Testing	Confirms ≥650 MPa UTS and ≥450 MPa yield strength	Per heat / batch
Hardness Testing	Brinell or Rockwell – max ≤290 HBW / ≤30 HRC	Per heat / batch
Charpy Impact Testing	Verifies low-temperature toughness at -40°C (as specified)	Per heat (optional)
Intergranular Corrosion Test (IGC)	Validates resistance to sensitization	Optional
Surface Roughness Check	For polished or special finish requirements	As required
Third-Party Inspection	SGS / BV / DNV / TUV – witnessed testing and certification	Upon customer request

These extensive tests ensure that every S32101 Lean Duplex Stainless Steel Pipe from Womic Steel mee

t

Applications of S32101 Lean Duplex Stainless Steel Pipe

S32101 lean duplex stainless steel pipe is the ideal cost-effective, high-strength alternative to 304, 316L, and even carbon steel with coatings. Its exceptional strength-to-cost ratio makes it suitable for a wide range of applications where weight reduction and lifecycle cost savings are priorities.

Industry	Typical Applications
Structural and Construction	Bridge components, support structures, building frames, crash barriers, pedestrian bridges – high strength allows significant weight reduction
Transportation	Rail car bodies, tanker trucks, shipping containers, trailer frames – weight reduction improves fuel efficiency
Concrete Reinforcement	Reinforcing bars for concrete structures in marine environments – eliminates corrosion-induced concrete spalling
Storage Tanks	Chemical storage tanks, water storage tanks, fuel tanks – higher strength allows thinner walls
Food and Beverage Processing	Processing equipment, storage silos, piping systems – good cleanability and corrosion resistance
Marine and Offshore	Seawater piping (low to moderate exposure), ballast systems, firewater lines, offshore platform structures – certified by ABS, BV, DNV, LR, GL, RINA, CCS, KR, NK
Water Treatment	Freshwater and brackish water handling, water intake screens, aeration piping
Mining and Mineral Processing	Slurry lines, process water systems, chutes, hoppers – where wear resistance is important
Paper and Pulp	Process piping in non-bleach areas, structural supports
Chemical Processing	Dilute acid handling, caustic service – moderate corrosion resistance at low cost
Architectural and Decorative	Handrails, canopies, building cladding, street furniture – aesthetic finishes available
Replacement for Coated Carbon Steel	Applications where carbon steel requires painting, galvanizing, or cathodic protection – eliminates maintenance costs

S32101 Lean Duplex Stainless Steel Pipe Packing, Delivery, and Womic Steel’s Transportation Advantage

Each S32101 lean duplex stainless steel pipe is securely packed and clearly labeled to ensure safe and efficient transport worldwide.

General packaging for local truck transport:
Bundle packing with woven fabric, iron strip bundle, plastic cap on both ends.

Hexagonal packaging:
Bundle packing with woven fabric, iron strip bundle, plastic cap on two ends.

Packaging for welded pipe in medium and large sizes:
Wrapped with woven fabric by automatic packaging for export sea-worthy transport.

Packaging for medium and large size welded pipes for export:
Wooden or steel crate packaging for export sea-worthy transport.

General packaging for products to be exported:
Wooden box for export sea-worthy transport.

Packaging for structural and heavy-wall pipes:
Steel crate or bundle with protective edge guards for heavy-duty transport.

Womic Steel’s Shipping and Delivery Strengths for S32101 Lean Duplex Pipe:

1. Direct cooperation with global shipowners ensures the most competitive freight rates.

2. Professional loading and securing teams guarantee damage-free shipment, especially for long-length structural pipes.

3. Efficient document preparation – includes EN 10204 3.1 certificates, material test reports (MTR), and structural certification – minimizing customs delays.

4. Rapid delivery time – standard sizes of S32101 maintained in ready stock; large inventory ensures quick dispatch for structural projects.

5.Continuous cargo tracking and after-sales follow-up to ensure smooth arrival at destination.

Why Choose Womic Steel’s S32101 Lean Duplex Stainless Steel Pipe

Womic Steel is a trusted manufacturer and exporter specializing in lean duplex stainless steel pipes, including the ultra-low nickel S32101 grade. We are committed to delivering premium quality, cost-effective solutions, and professional service for structural, transportation, and industrial applications.

1. Strict quality control under ISO 9001 and PED 2014/68/EU certification.

2. Lean duplex expertise – specialized knowledge in low-nickel duplex phase balance control, heat treatment, and welding procedures.

3. Modern production lines – cold pilger mills and automatic TIG welding lines.

4. Complete testing, inspection, and documentation support – including ferrite measurement, PMI, and full traceability.

5. Lowest nickel content among duplex grades – maximum price stability and lowest material cost for duplex stainless steel.

6. Exceptional strength-to-cost ratio – yield strength of ≥450 MPa (three times that of 304) at a competitive price point.

7. Lifecycle cost savings – eliminates painting, coating, and cathodic protection required for carbon steel.

8. Flexible customization – special diameters, wall thicknesses, lengths, and surface finishes.

9. Fast production cycle – efficient manufacturing for both seamless and welded lean duplex pipes.

10. Reliable global shipping to all major ports worldwide.

11. Direct mill pricing – no middlemen, ensuring competitive costs.

Contact Womic Steel

For inquiries, technical support, or to request a quotation for your specific clad pipe requirements, please contact us:

Website: www.womicstainless.com

E‑mail: info@womicstainless.com

Tel / WhatsApp / WeChat:

Victor: +86 15575100681

Jack: +86 18390957568

Womic Steel – Your reliable partner for high‑quality stainless steel seamless pipes, metallurgically bonded clad tubes, and custom solutions for corrosion‑resistant applications.