Monel 400 Pipes | Monel 400 Seamless Pipes | Monel 400 Welded Pipes Supplier in India

ASTM B165 UNS N04400 Seamless & ASTM B725 Welded Monel Pipe Supplier in India

Monel 400 is a solid-solution nickel-copper alloy well known for its superior resistance to marine and highly corrosive environments. This alloy can only be strengthened through cold working, which enhances the mechanical properties of Alloy 400 seamless pipe while maintaining excellent corrosion resistance.

Cold-worked ASTM B165 UNS N04400 Monel 400 Seamless Pipes are available in both seamless and welded construction. Nickel-based ASME SB165 UNS N04400 pipes exhibit very low corrosion rates in rapidly flowing brackish water, seawater, and high-temperature steam environments. In caustic solutions, Monel 400 demonstrates remarkable durability and resistance. Its strong performance in freshwater systems further makes Monel 400 Pipe ideal for marine engineering and chemical processing applications.

The excellent resistance of Monel 400 Seamless Pipe to hydrochloric acid and hydrofluoric acid under deaerated conditions makes it suitable for non-oxidizing chloride environments. In the annealed condition, the strength of Monel 400 EFW Pipe is moderate; however, this can be significantly improved through controlled tempers and cold working processes.

Monel 400 Welded Pipes can operate at temperatures up to approximately 1000°F (538°C) and also maintain reliable mechanical properties at cryogenic temperatures. In addition, ASTM B725 UNS N04400 Welded Pipes offer excellent resistance to neutral and alkaline salts, as well as strong resistance to alkalis, ensuring long-term performance in demanding industrial environments.

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ASTM B165 UNS N04400 Seamless & ASTM B725 Welded Monel Pipe Supplier
Why Choose Solitaire Overseas as Your Monel 400 Pipe Supplier?
Monel 400 Pipe Specifications
ASTM B165 UNS N04400 Chemical Composition
Alloy 400 Pipe Mechanical Properties
Alloy 400 Pipe Physical Properties
Equivalent Material of Monel 400 Annealed Pipe
Monel 400 Pipe HS Code
Dimensions of Monel 400 Pipes
Monel Grade 400 Pipe Schedule
Weight Chart of Monel 400 Seamless Pipe
Pressure Rating of Monel 400 UNS N04400 Pipe
Alloy 400 Pipe Size Tolerance
Monel 400 Pipe Types
Monel 400 Welding Procedure
Monel Alloy 400 Pipe Inspection & Testing
Monel 400 Alloy Seamless Pipe Sizes in Stock
Monel 400 Pipe Price – International CIF Rates
Application of Nickel Alloy 400 Round Pipe
We Export Monel 400 Pipes Worldwide
Searches Related to Monel 400 Pipes
Frequently Asked Questions

Why Choose Solitaire Overseas as Your Monel 400 Pipe Supplier?

As one of India’s most trusted monel 400 pipe suppliers, Solitaire Overseas offers end-to-end solutions from raw material sourcing to final delivery. Our competitive edge lies in our large ready stock of Monel 400 Seamless Pipes and Monel 400 Welded Pipes, enabling fast lead times even for large orders. We work with mills and processors from India, Japan, Korea, Europe, and the USA to offer you the widest selection of alloy 400 pipe in the market.

Every Monel 400 Pipe we supply undergoes stringent quality checks including PMI testing, chemical & mechanical property verification, dimensional inspection, and non-destructive testing. We issue EN 10204/3.1B material test certificates with every consignment. Our NABL-approved laboratory ensures traceability and compliance for every ASTM B165 UNS N04400 pipe we export globally.

Our Strengths as Monel 400 Pipe Suppliers

Authorized distributor of premium Alloy 400 Pipemills
Bulk & custom cut-to-length services for Monel 400 Seamless Pipe
Fast delivery of Monel 400 Welded Pipes to 80+ countries
Dedicated QC team with NABL approved lab testing
Full documentation: MTC, COO, Fumigation, GSP Form A
Third-party inspection by TUV, SGS, Lloyd’s, Bureau Veritas
Competitive pricing on ASTM B165 UNS N04400 material
ISO 9001:2015 certified manufacturing & supply chain

Corrosion Resistance of Monel 400

Excellent resistance in flowing seawater & brackish water
Resistant to hydrofluoric acid (deaerated conditions)
Resistant to hydrochloric acid (deaerated conditions)
Outstanding resistance to alkalis & caustic solutions
Performs reliably in neutral & alkaline salt solutions
Superior resistance in steam at elevated temperatures
Low corrosion rates in freshwater environments
Resists stress corrosion cracking in many environments

Monel 400 Pipe Specifications

Specification	Details
Standards	ASTM: B165, B829, B725, B163 \| ASME: SB165 \| UNS: N04400 \| WNR: 2.4360
Seamless Pipe Sizes	OD: 3–600mm \| WT: 0.5–30mm \| Length: 0.5–12 Meters
Welded Pipe Sizes	OD: 6–200mm \| WT: 0.35–6.00mm \| Length: 0.5–12 Meters
Thick-Walled Pipe Sizes	OD: 10–600mm \| WT: 2.5–100mm \| Length: 0.5–12 Meters
Available Forms	Round, Square, Rectangle, Hydraulic, etc.
Manufacturing Method	Seamless, Welded, ERW, Cold Drawn, Hot Finished
Finish Options	Bright Annealed, Polished, Annealed & Pickled
Origin / Make	Indian, Japanese, Korean, European, American
Testing & Inspection	PMI, Chemical & Mechanical, Destructive & Non-Destructive, NABL Lab, Flaring Test
Documentation Offered	MTC (EN 10204/3.1), Certificate of Origin, Bill of Lading, Commercial Invoice

ASTM B165 UNS N04400 Chemical Composition

Grade	C (max)	Mn (max)	Si (max)	S (max)	Cu	Fe (max)	Ni (min)
Monel 400 / UNS N04400	0.30	2.00	0.50	0.024	28.0–34.0	2.50	63.00

Alloy 400 Pipe Mechanical Properties

Property	Value
Melting Point	1350 °C (2460 °F)
Tensile Strength	80,000 psi / 550 MPa
Yield Strength (0.2%)	35,000 psi / 240 MPa
Elongation	40%

Alloy 400 Pipe Physical Properties

Properties	Metric	Imperial
Density	8.8 gm/cm³	0.318 lb/in³

Equivalent Material of Monel 400 Annealed Pipe

STANDARD	UNS	WERKSTOFF NR.	BS	JIS	GOST	EN	AFNOR
Monel 400	N04400	2.4360	NA 13	NW 4400	МНЖМц 28-2,5-1,5	NiCu30Fe	NU-30M

Monel 400 Pipe HS Code

Material	HS Code
Alloy 400 Pipe	7507

Dimensions of Monel 400 Pipes

Size (inch)	OD (mm)	OD (inch)	WT (mm)	WT (inch)
1/8" NPS 6	10.3	0.41	1.73	0.068
1/4" NPS 8	13.7	0.54	2.24	0.088
3/8" NPS 10	17.1	0.68	2.31	0.091
1/2" NPS 15	21.3	0.84	2.77	0.109
3/4" NPS 20	26.7	1.05	2.87	0.113
1" NPS 25	33.4	1.32	3.38	0.133
1 1/4" NPS 32	42.2	1.66	3.56	0.14
1 1/2" NPS 40	48.3	1.9	3.68	0.145
2" NPS 50	60.3	2.375	3.91	0.154
2 1/2" NPS 65	73.0	2.875	5.16	0.203
3" NPS 80	88.9	3.5	5.49	0.216
3 1/2" NPS 90	101.6	4.0	5.74	0.226
4" NPS 100	114.3	4.5	6.02	0.237
5" NPS 125	141.3	5.563	6.55	0.258
6" NPS 150	168.3	6.625	7.11	0.28
8" NPS 200	219.1	8.625	8.18	0.322
10" NPS 250	273.0	10.75	9.27	0.365
12" NPS 300	323.8	12.75	10.31	0.406
14" NPS 350	355.6	14.0	11.13	0.437
16" NPS 400	406.4	16.0	12.7	0.5
18" NPS 450	457.0	18.0	14.27	0.562
20" NPS 500	508.0	20.0	15.09	0.594
24" NPS 600	610.0	24.0	17.48	0.688
32" NPS 800	813.0	32.0	17.48	0.688

Monel Grade 400 Pipe Schedule

Size	OD (inch)	10	10s	40	40s & Std	80s & E.H.	160	80
1/8	.405	.049	.049	.068	.068	.095		.095
1/4	.540	.065	.065	.088	.088	.119		.119
3/8	.675	.065	.065	.091	.091	.126		.126
1/2	.840	.083	.083	.109	.109	.147	.187	.147
3/4	1.050	.083	.083	.113	.113	.154	.218	.154
1	1.315	.109	.109	.133	.133	.179	.250	.179
1 1/4	1.660	.109	.109	.140	.140	.191	.250	.191
1 1/2	1.900	.109	.109	.145	.145	.200	.281	.200
2	2.375	.109	.109	.154	.154	.218	.343	.218
2 1/2	2.875	.120	.120	.203	.203	.276	.375	.276
3	3.500	.120	.120	.216	.216	.300	.437	.300
3 1/2	4.000	.120	.120	.226	.226	.318		.318
4	4.500	.120	.120	.237	.237	.337	.531	.337
4 1/2	5.000					.247	.355
5	5.563	.134	.134	.258	.258	.375	.625	.375
6	6.625	.134	.134	.280	.280	.432	.718	.432
7	7.625					.301	.500
8	8.625	.148	.148	.322	.322	.500	.906	.500
9	9.625					.342	.500
10	10.750	.165	.165	.365	.365	.500	1.125	.593
11	11.750					.375	.500
12	12.750	.180	.180	.406	.375	.500	1.312	.687
14	14.000	.250	.188	.437	.375	.500	1.406	.750
16	16.000	.250	.188	.500	.375	.500	1.593	.843
18	18.000	.250	.188	.562	.375	.500	1.781	.937

Weight Chart of Monel 400 Seamless Pipe

NPS	OD mm	OD in	WT mm	WT in	Sched	Lb/ft	kg/Mtr
1/2"	21	0.840	2.769	0.109	40 STD	0.851	1.268
1/2"	21	0.840	3.734	0.147	80 STD	1.088	1.621
3/4"	27	1.050	2.870	0.113	40 STD	1.131	1.684
3/4"	27	1.050	3.912	0.154	80 STD	1.474	2.195
1"	33	1.315	3.378	0.133	40 STD	1.679	2.501
1"	33	1.315	4.547	0.179	80 STD	2.172	3.325
1 1/4"	42	1.660	3.556	0.140	40 STD	2.273	3.385
1 1/4"	42	1.660	4.851	0.191	80 STD	2.997	4.464
1 1/2"	48	1.900	3.683	0.145	40 STD	2.718	4.048
1 1/2"	48	1.900	5.080	0.200	80 STD	3.361	5.409
2"	60	2.375	3.912	0.154	40 STD	3.653	5.441
2"	60	2.375	5.537	0.218	80 STD	5.022	7.480
2 1/2"	73	2.875	5.516	0.203	40 STD	5.793	8.629
2 1/2"	73	2.875	7.010	0.276	80 STD	7.661	11.411
3"	89	3.500	5.486	0.216	40 STD	7.576	11.284
3"	89	3.500	7.620	0.300	80 STD	10.253	15.272
4"	114	4.500	6.020	0.237	40 STD	10.790	16.073
4"	114	4.500	8.560	0.337	80 STD	14.983	22.318
6"	168	6.625	7.112	0.280	40 STD	18.974	58.263
6"	168	6.625	10.973	0.432	80 XHY	28.573	42.561

Pressure Rating of Monel 400 UNS N04400 Pipe

OD (in.)	.120	.109	.095	.083	.065	.049	.035	.028
1	4300	3900	3400	2900	2200	-	-	-
3/4	-	-	4600	4000	3000	2200	-	-
1/2	-	-	-	-	4400	3200	2300	-
3/8	-	-	-	-	6100	4400	3100	-
5/16	-	-	-	-	7300	5400	3700	-
1/4	-	-	-	-	9500	7000	4800	3700
1/8	-	-	-	-	-	-	10100	7900

Premier Monel 400 Pipe Supplier of high-quality products engineered for lasting performance.

Alloy 400 Pipe Size Tolerance

OD	WT-Tolerance	OD-Tolerance
1/8"	+0.08 / -0	±10%
1/4"	±0.10	±10%
Up to 1/2"	±0.13	±15%
1/2" to 1-1/2", excl	±0.13	±10%
1-1/2" to 3-1/2", excl	±0.25	±10%

Monel 400 Pipe Types

UNS N04400 Square Pipe

Alloy 400 Decorative Pipe

Monel Alloy 400 Round Pipe

Nickel Alloy 400 Hollow Pipe

Nicorros® 400 Rectangular Pipe

AMS 4574 Annealed Pipe

WNR 2.4360 Thick Wall Pipe

UNS N04400 Cold-Finished Pipe

Alloy 400 Hot Finished Pipe

Monel 400 Seamless Pipe

Monel 400 Welding Procedure

Welding Monel 400 Pipes requires careful attention to procedure, filler selection, and post-weld treatment. A controlled welding approach ensures the finished Monel 400 Seamless Pipe or Monel 400 Welded Pipe joint retains its original corrosion resistance and mechanical properties in service.

01

Pre-Weld Prep

Clean joint area, remove oxides & contaminants

02

Filler Selection

ERNiCu-7 (Monel Filler Metal 60) for GTAW/GMAW

03

Welding

GTAW/GMAW process with controlled heat input

04

Post-Weld HT

Stress relief at 870–980°C for critical applications

05

Inspection

Visual, radiographic & mechanical testing

Technical Note: The Monel 400 Welding Procedure follows a controlled 10-step process ensuring joint integrity, corrosion resistance, and structural reliability. Recommended filler metals include ERNiCu-7 (Monel Filler Metal 60) for GTAW/GMAW processes. Preheating is generally not required for base metal thickness under 25 mm; however, post-weld heat treatment may be performed at 870–980°C for stress relief in critical applications. PWHT improves ductility and reduces residual stresses in Monel 400 Welded Pipe assemblies.

Monel Alloy 400 Pipe Inspection & Testing

Every Monel 400 Pipe supplied by Solitaire Overseas is backed by a comprehensive quality assurance program. Our ASTM B165 UNS N04400 seamless pipes and ASTM B725 welded pipes are tested at our in-house NABL-approved laboratory and verified by independent third-party inspection agencies before dispatch.

Test Reports Offered

EN 10204/3.1B, 3.1 & 3.2 MTC
Chemical & Mechanical Reports
PMI Test Reports
Visual Inspection Reports
NABL Approved Lab Reports
Destructive Test Report
Non-Destructive Test Reports
100% Radiography Test Report
Flaring Test
Moisture Testing
Heat Treatment Charts
Surface Roughness Measurement
Third Party Inspection Available

Documentation Provided

Bill of Lading & Copy of Invoice
Manufacturer’s MTC Certificate
Country of Origin Certificate (Original)
Fumigation Certificates
Raw Materials Certificate
GSP Form A
HS Code Commercial Invoice (HS: 7507)
Govt. Approved Lab Certificate

Monel 400 Alloy Seamless Pipe Sizes in Stock

Pipe Form	Size Range	Schedule / Thickness	Dimension Standard
Monel 400 Seamless Pipe	1/8" to 16" inches	Sch 5, 5s, 10, 10s, 20, 30, 40s, 40, STD, 60, 80s, 80, 100, 120, XS, XXS, 160	ANSI B36.10, ANSI B36.19, ANSI B36.19M

Monel 400 Pipe Price – International CIF Rates

Country	CIF Price (per kg)	Sea Delivery	Air Delivery
Malaysia	$44 USD	18 days	3 days
Indonesia	$44 USD	20 days	3 days
Thailand	$44 USD	15 days	3 days

* Prices are indicative and subject to change based on quantity, specifications, and market conditions. Contact us for the best deal.

Application of Nickel Alloy 400 Round Pipe

Pump & Propeller Shafts

Marine propulsion systems

Marine Fixtures & Offshore Structures

Subsea and topside piping

Chemical Processing Equipment

Acid handling and reaction vessels

Valves, Pumps & Fittings

Corrosion-resistant flow control

Food Processing Industry

Hygienic processing lines

Oil and Gas Industry

Sour gas and downhole tubing

Power Plant Piping

Steam and condensate systems

Paper & Pulp Industry

Bleach plant piping

Water Supply Systems

Freshwater and seawater lines

Heat Exchangers

Shell-and-tube exchangers

Desalination Plants

Brine evaporators and flash systems

Pharmaceutical Equipment

Process piping and vessels

We Export Monel 400 Pipes Worldwide

USA
UK
Germany
Italy
Saudi Arabia
UAE
Qatar
Kuwait
Singapore
Malaysia
Indonesia
Thailand
Australia
Canada
Japan
South Korea
South Africa
Nigeria
Brazil
Mexico
Russia
Turkey
Norway
Portugal

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Frequently Asked Questions About Monel 400 Pipes

What is the difference between Monel 400 Seamless Pipes and Monel 400 Welded Pipes?

Monel 400 Seamless Pipes (ASTM B165 / UNS N04400) are manufactured without a weld seam, making them the preferred choice for high-pressure, high-temperature, and critical corrosion-resistant applications. Monel 400 Welded Pipes (ASTM B725) are formed from strip material and are generally more economical for lower-pressure and structural applications. Both types offer equivalent corrosion resistance when properly fabricated.

What standard governs Monel 400 Seamless Pipes?

Monel 400 Seamless Pipes are governed by ASTM B165 / ASME SB165 under the UNS designation N04400 (also known as WNR 2.4360). Additional specifications include ASTM B829 (general requirements for seamless nickel alloy pipe) and AMS 4574 for cold-drawn annealed pipe. Our stock covers 1/8" to 16" NPS in all standard schedules.

What is the maximum operating temperature for Monel 400 Pipe?

Monel 400 Pipe (UNS N04400) can operate reliably at temperatures up to approximately 1000°F (538°C). It also maintains reliable mechanical properties at cryogenic temperatures. For applications above 1000°F, Monel K500 or other higher-temperature alloys may be more appropriate.

Is Monel 400 always superior to Copper-Nickel alloys?

No, Monel 400 is not always superior to copper-nickel alloys. Monel 400 Pipe generally outperforms Cu-Ni alloys in high-velocity seawater, HF acid service, and caustic environments. However, 90/10 and 70/30 Cu-Ni alloys may be preferred in specific marine biofouling-resistant applications. Selection should always be based on specific service conditions, temperature, pressure, and fluid chemistry.

What certifications are provided with Monel 400 Pipes?

We supply all Monel 400 Pipes with EN 10204/3.1B Material Test Certificates (MTC), chemical and mechanical test reports, PMI test results, dimensional inspection reports, and NABL-approved lab certificates. Third-party inspection by TUV, SGS, Lloyds, or Bureau Veritas is available on request.

What is the HS Code for Monel 400 Pipe?

The HS Code for Alloy 400 / Monel 400 Pipe is 7507. This code covers tubes, pipes, and pipe fittings of nickel. All export shipments are accompanied by a commercial invoice with the correct HS code for seamless customs clearance worldwide.