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ASTM B725 UNS N04400 Monel 400 Welded Pipes

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Chemical Composition

Monel 400 Welded Pipes / UNS N04400 Fabricated Pipe

Monel 400 Welded Pipes are nickel-copper alloy pipes manufactured from ASTM B725 UNS N04400 welded pipe specifications for applications requiring exceptional corrosion resistance in seawater, acids, alkalis, and chemical processing environments. Available as Monel 400 ERW pipe, Monel 400 EFW pipe, and ASME SB725 Monel 400 pipe, these welded pipes offer excellent mechanical strength, weldability, and durability for marine, oil & gas, offshore, and heat exchanger applications.

Detailed Information

Monel 400 ERW & EFW Welded Pipes in Schedule 10S & Schedule 40

Monel 400 Welded Pipes are high-performance nickel-copper alloy pipes widely used in corrosive industrial environments where conventional stainless steels cannot provide long-term reliability. Manufactured according to ASTM B725 UNS N04400 welded pipe and ASTM B775 Monel 400 welded pipe standards, these pipes offer excellent resistance to seawater corrosion, hydrofluoric acid, sulfuric acid, alkaline solutions, and chloride-containing media.

We supply premium-quality Alloy 400 welded pipe in multiple sizes, wall thicknesses, and schedules to meet the needs of industries worldwide. Whether you require Monel alloy 400 welded pipe for offshore platforms, chemical processing plants, marine equipment, or power generation facilities, we provide products that comply with international quality standards and undergo strict quality inspections before dispatch.

As an experienced Monel 400 welded pipe supplier, we maintain ready stock of Schedule 10S Monel 400 welded pipe, Schedule 40 Monel 400 welded pipe, and customized sizes for urgent project requirements.

Cities We Delivered

New York City, Los Angeles, Chicago, Houston, Phoenix, Philadelphia, San Antonio, San Diego, Dallas, San Jose, Austin, Jacksonville, Fort Worth, Columbus, Charlotte, San Francisco, Indianapolis, Seattle, Denver, Washington, Boston, El Paso, Nashville, Detroit, Oklahoma City, Portland, Las Vegas, Memphis, Louisville, Baltimore, Milwaukee, Albuquerque, Tucson, Fresno, Mesa, Sacramento, Atlanta, Kansas City, Colorado Springs, Omaha, Raleigh, Miami, Long Beach, Virginia Beach, Oakland, Minneapolis, Tulsa, Tampa, Arlington, New Orleans, Wichita, Bakersfield, Cleveland, Aurora, Anaheim, Honolulu, Santa Ana, Riverside, Corpus Christi, Lexington, Henderson, Stockton, Saint Paul, Cincinnati, St. Louis, Pittsburgh, Greensboro, Lincoln, Anchorage, Plano, Orlando, Irvine, Newark, Durham, Chula Vista, Toledo, Fort Wayne, St. Petersburg, Laredo, Jersey City, Chandler, Madison, Lubbock, Scottsdale, Reno, Buffalo, Gilbert, Glendale, North Las Vegas, Winston-Salem, Chesapeake, Norfolk, Fremont, Garland, Irving, Hialeah, Richmond, Boise, Spokane, Baton Rouge, Tacoma, San Bernardino, Modesto, Fontana, Des Moines, Moreno Valley, Santa Clarita, Fayetteville, Birmingham, Oxnard, Rochester, Port St. Lucie, Grand Rapids, Huntsville, Salt Lake City, Frisco, Yonkers, Amarillo, Glendale, Huntington Beach, McKinney, Montgomery, Augusta, Aurora, Akron, Little Rock, Tempe, Columbus, Overland Park, Grand Prairie, Tallahassee, Cape Coral, Mobile, Knoxville, Shreveport, Worcester, Ontario, Vancouver, Sioux Falls, Chattanooga, Brownsville, Fort Lauderdale, Providence, Newport News, Rancho Cucamonga, Santa Rosa, Peoria, Oceanside, Elk Grove, Salem, Pembroke Pines, Eugene, Garden Grove, Cary, Fort Collins, Corona, Springfield, Jackson, Alexandria, Hayward, Clarksville, Lakewood, Lancaster, Salinas, Palmdale, Hollywood, Springfield, Macon, Kansas City, Sunnyvale, Pomona, Killeen, Escondido, Pasadena, Naperville, Bellevue, Joliet, Murfreesboro, Midland, Rockford, Paterson, Savannah, Bridgeport, Torrance, McAllen, Syracuse, Surprise, Denton, Roseville, Thornton, Miramar, Pasadena, Mesquite, Olathe, Dayton, Carrollton, Waco, Orange, Fullerton, Charleston, West Valley City, Visalia, Hampton, Gainesville, Warren, Coral Springs, Cedar Rapids, Round Rock, Sterling Heights, Kent, Columbia, Santa Clara, New Haven, Stamford, Concord, Elizabeth, Athens, Thousand Oaks, Lafayette, Simi Valley, Topeka, Norman, Fargo, Wilmington, Abilene, Odessa, Columbia, Pearland, Victorville, Hartford, Vallejo, Allentown, Berkeley, Richardson, Arvada, Ann Arbor, Rochester, Cambridge, Sugar Land, Lansing, Evansville, College Station, Fairfield, Clearwater, Beaumont, Independence, Provo, West Jordan, Murrieta, Palm Bay, El Monte, Carlsbad, North Charleston, Temecula, Clovis, Springfield, Meridian, Westminster, Costa Mesa, High Point, Manchester, Pueblo, Lakeland, Pompano Beach, West Palm Beach, Antioch, Everett, Downey, Lowell, Centennial, Elgin, Richmond, Peoria, Broken Arrow, Miami Gardens, Billings, Jurupa Valley, Sandy Springs, Gresham, Lewisville, Hillsboro, Ventura, Greeley, Inglewood, Waterbury, League City, Santa Maria, Tyler, Davie, Lakewood, Daly City, Boulder, Allen, West Covina, Sparks, Wichita Falls, Green Bay, San Mateo, Norwalk, Rialto, Las Cruces, Chico, El Cajon, Burbank, South Bend, Renton, Vista, Davenport, Edinburg, Tuscaloosa, Carmel, Spokane Valley, San Angelo, Vacaville, Clinton, Bend, Woodbridge.

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Monel 400 Seamless Pipes Specifications

Specifications	:	ASTM B165 ASME SB165
Dimensions	:	ASTM, ASME and API
Size	:	15″NB TO 150″NB IN
Specialized in	:	Large Diameter Size
Range	:	6.35 mm OD upto 254 mm OD in 0.6 TO 20 mm thickness.
Type	:	Seamless / ERW / Welded / Fabricated
Form	:	Round, Hydraulic Etc
Length	:	Single Random, Double Random & Cut Length.
Thickness Range	:	0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS
End	:	Plain End, Beveled End, Treaded

Monel 400 Pipe Chemical Composition

Grade	C	Mn	Si	S	Cu	Fe	Ni	Cr
Monel 400	0.30 max	2.00 max	0.50 max	0.24max	28.0-34.0	2.50 max	63.00 min	–

Alloy 400 Pipe Physical Properties

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

Monel 400 Pipe Mechanical Properties

Element	Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
Monel 400	8.8 g/cm3	1350 °C (2460 °F)	Psi – 80,000 , MPa – 550	Psi – 35,000 , MPa – 240	40 %

Equivalent Grades for Alloy 400 UNS N04400 Pipe

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

Types of monel 400 Seamless & Welded Pipe for sale in India

monel 400 Hollow Pipe
Alloy 400 Seamless Pipe
monel 400 Bush Hex Pipe
monel 400 Round Pipe
400 Monel Alloy Round Pipe
400 Custom Inconel Pipe
400 Monel Alloy Custom Pipe
400 Monel Fabricated Pipe
Monel Alloy 400 Thick Wall Pipe
SCH40 monel 400 pipe
Alloy 400 flex pipe
400 Monel Alloy Polished Pipe
Monel 400 ERW Pipe
ASTM B725 UNS N04400 Welded Pipe
ASME SB725 Monel 400 Pipe
DIN 2.4360 Welded Pipe
Schedule 10S Monel 400 Welded Pipe

monel 400 Thin Wall Pipe
Monel Alloy 400 Thin Wall Pipe
ASTM B165 Inconel Seamless Pipe
Alloy 400 Welded Pipe
ASTM B165 Inconel Round Pipe
ASTM B165 Inconel Custom Pipe
ASTM B165 Inconel Thick Wall Pipe
ASTM B165 Inconel Thin Wall Pipe
monel 400 Round Pipe
UNS N04400 Inconel clad pipe
UNS N04400 Inconel welded pipe
UNS N04400 400 Monel lined pipe
Monel 400 EFW Pipe
ASTM B775 Monel 400 Welded Pipe
UNS N04400 Welded Pipe
W.Nr. 2.4360 Pipe
Schedule 40 Monel 400 Welded Pipe

UNS N04400 Pipe Schedule Chart

1/8″ IPS(.405″O. D.)	3 1/2″ IPS( 4.000″O. D.)
SCH 40, 80	SCH 10, 40, 80, 160, XXH
1/4″ IPS(.540″O. D.)	4″ IPS(4.500″O. D.)
SCH 10, 40, 80	SCH 10, 40, 80, 160, XXH
3/8″ IPS(.675″O. D.)	5″ IPS( 5.563″O. D.)
SCH 10, 40, 80	SCH 10, 40, 80, 160, XXH
1/2″ IPS(.840″O. D.)	6″ IPS(6.625″O. D.)
SCH 5, 10, 40, 80, 160, XXH	SCH 5, 10, 40, 80, 120, 160, XXH
3/4″ IPS(1.050″O. D.)	8 ” IPS(8.625″O. D.)
SCH 10, 40, 80, 160, XXH	SCH 5, 10, 40, 80, 120, 160, XXH
1″ IPS:(1.315′O. D.)	10″ IPS(10.750″O. D.)
SCH 5, 10, 40, 80, 160, XXH	SCH 10, 20, 40, 80 (.500), TRUE 80(.500)
1-1/4″ IPS(1.660″O. D.)	12″ IPS(12.750″O. D.)
SCH 10, 40, 80, 160, XXH	SCH 10, 20, 40(.375), TRUE40(.406), SCH80(.500)
1-1/2″ IPS(1.900″O. D.)	14″ IPS(14.000″O. D.)
SCH 10, 40, 80, 160, XXH	SCH10 (.188), SCH40 (.375)
2″ IPS(2.375″O. D.)	16″ IPS(16.000″O. D.)
SCH 10, 40, 80, 160, XXH	SCH10(.188), SCH40(.375)
2 1/2″ IPS(2.875″O. D.)	18″ IPS (18.000″O. D.)
SCH 10, 40, 80, 160, XXH	SCH-40 (.375)
3″ IPS( 3.500″O. D.)
SCH 5, 10, 40, 80, 160, XXH

Maximum Allowable Working Pressure For Metric Sizes

Pipe OD	Wall Thickness (Inches)
Pipe OD	0.5	0.6	0.7	0.8	1.0	1.2	1.5	1.6	1.8	2.0	2.2	2.5	3.0
3	464	567	672	775	965
4	335	411	491	567	723	873
6			310	360	464	567	723	775
8			227	262	335	411	528	567
10				206	262	320	411	442
12				169	215	262	335	360	411	464
14					182	222	282	303	345	389	433	500	612
16					158	192	244	262	298	335	372	430	528
18					140	169	215	230	262	294	326	377	464
22					113	137	173	186	211	236	262	301	369
25					99	120	152	162	184	206	228	262	320

Monel 400 Pipe Pressure Rating

Pipe O.D. (in.)	Wall Thickness of Pipe (inches)
	.028	.035	.049	.065	.083	.095	.109	.120
	Working Pressure (psig)
1/8	7900	10100
1/4	3700	4800	7000	9500
5/16		3700	5400	7300
3/8		3100	4400	6100
1/2		2300	3200	4400
3/4			2200	3000	4000	4600
1				2200	2900	3400	3900	4300

Pipe OD	Wall Thickness (Inches)
Pipe OD	.010	.012	.016	.020	.028	.035	.049	.065	.083	.095	.109	.120
1/16	6,422	7,872	10,768	13,484
1/8				6,422	9,325	11,823
3/16				4,081	5,935	7,630	11,005
1/4					4,305	5,518	8,053	10,946
3/8						3,530	5,107	7,029
1/2						2,595	3,721	5,078	6,699
5/8						2,051	2,927	3,970	5,200	6,056
3/4						1,696	2,412	3,259	4,249	4,933	5,755	6,422
7/8						1,446	2,051	2,764	3,592	4,161	4,842	5,391
1						5,040	7,140	9,595	12,445	14,390	16,715	18,58

Monel 400 Pipe Weight Chart

NPS	Outside Diameter		Wall Thickness			Weight	Weight
NPS	in	mm	in	mm	Sched	kg/Mtr	Lb/ft
1/2″	0.840	21	0.109	2.769	40 STD	1.268	0.851
			0.147	3.734	80 STD	1.621	1.088
3/4″	1.050	27	0.113	2.870	40 STD	1.684	1.131
			0.154	3.912	80 STD	2.195	1.474
1″	1.315	33	0.133	3.378	40 STD	2.501	1.679
			0.179	4.547	80 STD	3.325	2.172
1 1/4″	1.660	42	0.140	3.556	40 STD	3.385	2.273
			0.191	4.851	80 STD	4.464	2.997
1 1/2″	1.900	48	0.145	3.683	40 STD	4.048	2.718
			0.200	5.080	80 STD	5.409	3.361
2″	2.375	60	0.154	3.912	40 STD	5.441	3.653
			0.218	5.537	80 STD	7.480	5.022
2 1/2″	2.875	73	0.203	5.516	40 STD	8.629	5.793
			0.276	7.010	80 STD	11.411	7.661
3″	3.500	89	0.216	5.486	40 STD	11.284	7.576
			0.300	7.620	80 STD	15.272	10.253
4″	4.500	114	0.237	6.020		16.073	10.790
			0.337	8.560		22.318	14.983
6″	6.625	168	0.188	4.775		19.252	12.924
			0.203	5.516		20.739	13.923
			0.219	5.563		22.318	14.983
			0.250	6.350		25.354	17.021
			0.280	7.112	40 STD	58.263	18.974
			0.312	7.925		31.334	21.036
			0.375	9.525		37.285	25.031
			0.432	10.973	80 XHY	42.561	28.573
			0.500	12.700		48.719	32.708
8″	8.625	219	0.188	4.775		25.233	16.940
			0.203	5.156		27.198	18.259
			0.219	5.563		29.286	19.661
			0.250	6.350	20	33.308	22.361
			0.277	7.036	30	36.786	24.696
			0.322	8.179	40	42.352	28.554
			0.375	9.525		49.216	33.041
			0.406	10.312	60	53.085	35.638
			0.500	12.700	80 XHY	64.627	43.388
10″	10.750	273	0.188	4.775		31.588	21.207
			0.219	5.563		36.689	24.631
			0.250	6.350	20	41.759	28.035
			0.307	7.798	30	51.002	34.240
			0.344	8.738		56.946	38.231
			0.365	9.271	40 STD	63.301	40.483
			0.438	11.125		71.852	48.238
			0.500	12.700	60 XHY	81.530	54.735
			0.594	15.088	80	95.969	64.429
12″	12.750	324	0.188	4.775		37.570	25.222
			0.219	5.563		43.657	29.309
			0.250	6.350		49.713	33.375
			0.281	7.137		55.739	37.420
			0.312	7.925		61.735	41.445
			0.375	9.525		73.824	49.562
			0.406	10.312		79.727	53.525
			0.500	12.700		97.438	65.415
			0.562	14.275		108.966	73.154
14″	14.000	356	0.188	4.775		41.308	27.732
			0.219	5.563		48.012	32.233
			0.250	6.350	20	54.685	36.713
			0.281	7.137		61.327	41.172
			0.312	7.925		67.939	45.611
			0.375	9.525	STD	81.281	54.568
			0.438	11.125	40	94.498	63.441
			0.500	12.700	XHY	107.381	72.090
			0.625	15.875		132.983	89.278
16”	16.000	406	0.188	4.775		47.290	21.748
			0.219	5.563		54.980	36.910
			0.250	6.350	10	62.639	42.053
			0.281	7.137		70.268	47.174
			0.312	7.925	20	77.866	52.275
			0.344	8.738		85.677	57.519
			0.375	9.525	30 STD	93.213	62.578
			0.438	11.125		108.433	72.797
			0.500	12.700	40 XHY	123.289	82.770
18″	18.000	457	0.219	5.563		61.948	41.588
			0.250	6.350		70.593	47.393
			0.281	7.137		79.208	53.176
			0.312	7.925	20	87.792	58.939
			0.375	9.525	STD	105.144	70.588
			0.438	11.125	30	122.369	82.152
			0.500	12.700	XHY	139.198	93.450
			0.562	14.275	40	155.904	104.666
			0.625	15.875		172.754	115.978
20″	20.000	508	0.250	6.350		78.547	52.733
			0.282	7.163		88.458	59.386
			0.312	7.925		97.719	65.604
			0.375	9.525	20 STD	117.075	78.598
			0.438	11.125		136.305	91.508
			0.500	12.700	30 XHY	155.106	104.130
			0.594	15.088	40	183.378	123.110
			0.625	15.875		192.640	129.328
			0.688	17.475		211.368	141.901
24″	24.000	610	0.250	6.350		94.456	63.413
			0.281	7.137		106.029	71.183
			0.312	7.925		117.573	18.932
			0.375	9.525	20 STD	140.938	64.618
			0.438	11.125		164.176	110.219
			0.500	12.700	XHY	186.923	125.490
			0.625	15.875		232.410	156.028
			0.688	17.475	40	255.148	171.293
			0.750	19.050		277.401	186.233
30″	30.000	762	0.250	6.350		118.318	79.433
			0.281	7.137		132.851	89.189
			0.312	7.925	10	147.353	98.925
			0.375	9.525	STD	176.731	118.648
			0.438	11.125		205.983	138.286
			0.500	12.700	20 XHY	234.647	157.530
			0.625	15.875	30	292.066	196.078
			0.688	17.475		320.817	215.380
			0.750	19.050		348.988	234.293
36″	36.000	914	0.250	6.350		142.180	95.453
			0.281	7.137		159.672	107.196
			0.312	7.925	10	177.133	118.918
			0.375	9.525	STD	215.525	142.678
			0.438	11.125		247.790	166.353
			0.500	12.700	20 XHY	282.372	198.570
			0.625	15.875		351.723	236.128
			0.688	17.475		386.487	259.467
			0.750	19.050		420.576	282.353
42″	42.000	1067	0.312	7.925		206.914	138.911
			0.375	9.525	STD	248.319	166.708
			0.500	12.700	XHY	33.097	221.610
			0.750	19.050		492.163	330.413
48″	48.000	1219	0.375	9.525	STD	284.112	190.738
			0.438	11.125		331.404	222.487
			0.500	12.700	XHY	377.822	253.650
			0.750	19.050		563.750	378.473
			0.875	22.225		655.969	440.383

ASTM B165 monel 400 Pipe Sizes

WT = monel 400 pipe wall thickness

OD = monel 400 pipe outside diameter

ASTM B165 monel 400 Pipe OD mm	Pipe WT mm	in.	Sch	Kg/m
13.72	1.65	1/4	10S	0.50
13.72	2.24	1/4	40S	0.64
13.72	3.02	1/4	80S	0.81
17.15	1.65	3/8	10S	0.64
17.15	2.31	3/8	40S	0.86
17.15	3.20	3/8	80S	1.12
21.34	2.11	1/2	10S	1.02
21.34	2.77	1/2	40S	1.29
21.34	3.73	1/2	80S	1.65
26.67	2.11	3/4	10S	1.30
26.67	2.87	3/4	40S	1.71
26.67	3.91	3/4	80S	2.23
33.40	2.77	1	10S	2.13
33.40	3.38	1	40S	2.54
33.40	4.55	1	80S	3.29
33.40	6.352)	1	160	4.30
42.16	2.77	1¼	10S	2.73
42.16	3.56	1¼	40S	3.44
42.16	4.85	1¼	80S	4.53
42.16	6.352)	1¼	160	5.69
48.26	2.77	1½	10S	3.16
48.26	3.68	1½	40S	4.11
48.26	5.08	1½	80S	5.49
60.33	2.77	2	10S	3.99
60.33	3.91	2	40S	5.52
60.33	5.54	2	80S	7.60
60.33	8.742)	2	160	11.29
73.03	3.05	2½	10S	5.35
73.03	5.16	2½	40S	8.77
73.03	7.01	2½	80S	11.59
88.90	3.05	3	10S	6.56
88.90	5.49	3	40S	11.47
88.90	7.62	3	80S	15.51
88.90	11.132)	3	160	21.67
101.60	3.05	3½	10S	7.53
101.60	5.74	3½	40S	13.78
101.60	8.08	3½	80S	18.92
114.30	3.05	4	10S	8.50
114.30	6.02	4	40S	16.32
114.30	8.56	4	80S	22.67
114.30	13.492)	4	160	34.05
141.30	6.55	5	40S	22.10
141.30	9.53	5	80S	31.44
141.30	15.882)	5	160	49.87
168.28	3.4	6	10S	14.04
168.28	7.11	6	40S	28.69
168.28	10.97	6	80S	43.21
168.28	14.27	6	120	54.75
168.28	18.262)	6	160	68.59
219.08	8.18	8	40S	43.20
219.08	12.7	8	80S	65.63
219.08	18.23	8	120	91.30
219.08	23.012)	8	160	112.97

Applications of Monel 400 Welded Pipes

Our Monel alloy 400 welded pipe is widely used across numerous industries, including:

Offshore oil and gas platforms
Marine engineering
Shipbuilding industry
Chemical processing plants
Heat exchangers
Condensers
Power generation
Petrochemical plants
Desalination facilities
Aerospace components
Pharmaceutical processing
Salt production plants

Why Choose Us as Your Monel 400 Welded Pipe Supplier?

We are committed to delivering high-quality industrial piping solutions that meet international standards. As a reliable Monel 400 welded pipe supplier and Monel 400 EFW pipe exporter, we provide:

Extensive inventory for fast deliveries
Competitive pricing
Complete mill test certificates (MTC EN 10204 3.1)
Third-party inspection support
Worldwide shipping
Custom lengths and fabrication
Strict quality assurance
Technical assistance for material selection

Our quality management system ensures every Alloy 400 welded pipe is inspected for dimensional accuracy, chemical composition, mechanical performance, and weld integrity before shipment.

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