Stainless Steel 904L Seamless Pipes

Thaida Stainless Steel Tubes Manufacturing (Thailand) Co.Ltd., a trusted stainless steel 904L seamless pipes manufacturer and supplier based in Chon Buri, Thailand, offers premium quality pipes known for their exceptional performance. Made from a low carbon, high nickel and molybdenum alloy, 904L stainless steel pipe provides outstanding resistance to acids, chloride stress corrosion cracking and pitting. These pipes offer better durability, weldability and corrosion resistance compared to 304 stainless steel. These pipes are ideal for industries such as chemical processing, oil & gas and marine applications. Detailed specifications, available types and insights into the 904L stainless steel pipe manufacturing process ensure the right fit for diverse needs.

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Product Description - Stainless Steel 904l Seamless Pipes

Stainless Steel 904L Seamless Pipes are high-quality pipes made from a special grade of stainless steel that is designed for tough environments. Alloy 904L (N08904) Stainless Steel is a low-carbon version containing high amounts of nickel and molybdenum, offering excellent strength and strong resistance to corrosion, especially against strong acids like sulfuric acid, phosphoric acid and other harsh chemicals. With a 70-90 Rockwell B hardness score, these pipes maintain their durability even in extreme conditions, which makes them ideal for chemical processing, marine, oil and gas and pharmaceutical industries.

Stainless steel 904L seamless pipes are available in a wide range of sizes from 1/2″” – 10″”, thicknesses and pipe schedules including Sch 10, Sch 40, Sch 80 and more. These pipes follow international standards, including ASTM A312 TP904L and UNS N08904. Custom sizes and specifications are also available to meet specific project needs.

Key Benefits of Stainless Steel 904l Seamless Pipes

Below are the main key benefits that make stainless steel 904L seamless pipes a strong and dependable choice for tough industrial uses.

Provides outstanding protection against strong acids, chlorides and harsh environments, ensuring long-lasting performance.

These pipes are designed to handle extreme temperatures and pressures while maintaining structural integrity.

Offers a smooth, bright finish that enhances the appearance of visible piping systems and architectural designs.

Manufactured with strict control over the chemical composition, which ensures clean, reliable and contaminant-free piping solutions.

This pipe is built to withstand heavy usage and environmental stress which makes it ideal for demanding industrial and commercial applications.

Why Choose Our Stainless Steel 904l Seamless Pipes?

Thaida Stainless Steel Manufacturing (Thailand) Co., Ltd. provides stainless steel 904L seamless pipes known for exceptional quality and ASTM standard compliance. Our pipes undergo thorough testing and quality control to guarantee reliability and durability in every batch. We offer competitive prices without compromising on standards, ensuring great value for your investment. With fast delivery services and positive customer feedback, we are committed to meeting your project deadlines and satisfaction. Our industry certifications further confirm our dedication to excellence, making us the trusted choice for stainless steel piping solutions.

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Stainless Steel 904l Seamless Pipes Specifications

The below stainless steel 1.4539 seamless pipe specifications table presents grade, schedule, dimensions and standard compliance for quality piping solutions.

Standard	ASTM, DIN, GB, AISI, JIS, ISO, etc other International Standards
Dimensions	ASTM, ASME and API
Specifications	ASTM A312
Pipes Size	1/2″ NB – 16″ NB
Length	Single Random, Double Random & Required Length or As per Customer Requirement
Schedule	SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Types	Seamless
Form	Round Pipes, Square Pipes, Rectangular Pipes, "U" Shape
End	Plain End, Beveled End, Treaded
Application	Food & Beverage Industry, Construction Industry, Nuclear, Thermal & Power Plants, Petrochemical, Boilers, Cement Industry, Geothermal Plants, Heat Exchangers, Instrumentation Jobs, Mechanical Jobs, Oil and Gas Equipments and Piping Works
Package	Plastic caps on botd ends, Steel bundle, Woven bag or acc. to customers' request

Chemical Composition of Stainless Steel 904l Seamless Pipes

The table below displays the chemical composition of stainless steel 904L Seamless Pipes, including key elements like Chromium, Nickel, Molybdenum, and Copper.

Grade	C	Mn	P	S	Si	Cr	Ni	Mo	Cu	Fe
UNS N08904	≤0.02	≤2.00	≤0.04	≤0.03	≤1.00	19.00-23.00	23.00-28.00	4.00-5.00	1.20-2.00	Balance ≥39.50

Mechanical Strength of Stainless Steel 904l Seamless Pipes

Refer to the table below for the mechanical strength of stainless steel UNS N08904 Seamless Pipes, covering properties like yield strength, hardness and tensile strength.

Property	Value
Density	8.0 g/cm³
Melting Point	1454 °C (2650 °F)
Tensile Strength	Psi – 75,000 , MPa – 515
Yield Strength (0.2% Offset)	Psi – 30,000 , MPa – 205
Elongation	35 %

Stainless Steel 904l Seamless Pipes Price

Get a clear understanding of the price range for stainless steel 904L seamless pipes with the detailed breakdown shown below.

Price of 904L Stainless Steel Pipes manufacturer in Thailand	904L Stainless Steel Pipes Price in Thailand (INR)	904L SS Pipes Price in UAE Dirham
Stainless Steel 904L Pipes	950 INR	48.67 UAE Dirham
SS 904l Seamless Tubes	1300 INR	66.60 UAE Dirham
Uns N08904 Pipes	1150 INR	58.91 UAE Dirham

Stainless Steel 904l Seamless Pipes Dimensions

Explore the full range of stainless steel 904L seamless pipe dimensions below, ideal for different industrial and structural applications.

Nominal size [inches]	Outside diameter (OD) [inches]	Outside diameter (OD) [mm]	Wall thickness [inches]	Wall thickness [mm]	Weight [lb/ft]	Weight [kg/m]
1/8" NPS 6	0.41	10.3	0.068	1.73	0.24	0.37
1/4" NPS 8	0.54	13.7	0.088	2.24	0.42	0.63
3/8" NPS 10	0.68	17.1	0.091	2.31	0.57	0.84
1/2" NPS 15	0.84	21.3	0.109	2.77	0.85	1.27
3/4" NPS 20	1.05	26.7	0.113	2.87	1.13	1.69
1" NPS 25	1.32	33.4	0.133	3.38	1.68	2.5
1 1/4" NPS 32	1.66	42.2	0.14	3.56	2.27	3.39
1 1/2" NPS 40	1.9	48.3	0.145	3.68	2.72	4.05
2" NPS 50	2.375	60.3	0.154	3.91	3.65	5.44
2 1/2" NPS 65	2.875	73.0	0.203	5.16	5.79	8.63
3" NPS 80	3.5	88.9	0.216	5.49	7.58	11.29
3 1/2" NPS 90	4.0	101.6	0.226	5.74	9.11	13.57
4" NPS 100	4.5	114.3	0.237	6.02	10.79	16.07
5" NPS 125	5.563	141.3	0.258	6.55	14.62	21.77
6" NPS 150	6.625	168.3	0.28	7.11	18.97	28.26
8" NPS 200	8.625	219.1	0.322	8.18	28.55	42.55
10" NPS 250	10.75	273.0	0.365	9.27	40.48	60.31
12" NPS 300	12.75	323.8	0.406	10.31	53.52	79.73
14" NPS 350	14.0	355.6	0.437	11.13	54.57	94.55
16" NPS 400	16.0	406.4	0.5	12.7	82.77	123.3
18" NPS 450	18.0	457.0	0.562	14.27	104.67	155.8
20" NPS 500	20.0	508.0	0.594	15.09	123.11	183.42
24" NPS 600	24.0	610.0	0.688	17.48	171.29	255.41
32" NPS 800	32.0	813.0	0.688	17.48	230.08	342.91

stainless-steel-904l-seamless-pipes-weight-chart

The weight of stainless steel 904L seamless pipes varies by size and thickness—see the detailed chart below for exact figures.

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

stainless-steel-904l-seamless-pipes-size-chart

The following chart displays standard sizing options for stainless steel 904L seamless pipes based on industry specifications.

904L Stainless Steel Pipes 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

Stainless Steel 904l Seamless Pipes Manufacturing Process

Following are the 5 steps involved in the stainless steel 1.4539 seamless pipes manufacturing process to achieve high-quality output. Our manufacturing process is professional and precise, ensuring each pipe is crafted with exceptional strength, durability and a flawless finish.

1. Raw Material Selection

High-quality stainless steel billets and strips are carefully selected for superior strength and corrosion resistance.

2. Pipes Formation

The selected raw material is formed into pipes using seamless extrusion methods, depending on the application.

3. Heat Treatment

Pipes undergo required controlled heat treatment to enhance mechanical properties and relieve internal stresses.

4. Cold Working and Finishing

After heat treatment, pipes are cold-worked for better surface finish, dimensional accuracy and improved strength.

5. Quality Control and Testing

Every pipe is thoroughly inspected and tested to ensure it meets international quality standards for performance and reliability.

Application of Stainless Steel 904l Seamless Pipes

Stainless Steel 904L Seamless Pipes are primarily used in the chemical and petrochemical industries, where they handle highly corrosive acids, alkalis, and other aggressive chemicals. These pipes are essential in manufacturing equipment such as heat exchangers, reactors, and storage tanks, where resistance to strong acids and chloride environments is crucial for safety and longevity. SS 904L seamless pipes are widely used in marine and offshore applications, including shipbuilding and seawater desalination plants, because they withstand saltwater corrosion exceptionally well. Power plants and pharmaceutical industries also rely on these pipes for their durability and ability to perform in harsh environments.

Oil and Gas Industry

Chemical and Petrochemical Industry

Food and Beverage Industry

Pharmaceutical & Biotechnology

Automotive and Transportation

Construction and Architecture

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FAQ's

Which industries commonly use Stainless Steel 904L Seamless Pipes?

Stainless Steel 904L seamless pipe is commonly used in the chemical processing, oil and gas, and pharmaceutical industries due to its high corrosion resistance. It is also used in applications like power generation, desalination plants, pulp and paper manufacturing, food processing, and wastewater treatment.

Can Thaida provide customized Stainless Steel 904L Seamless Pipes?

Yes, Thaida offers customization for Stainless Steel 904L Seamless Pipes, including options for specific lengths, wall thicknesses, and surface finishes. These customizations ensure the pipes meet precise project and customer requirements

What are the common grades of Stainless Steel 904L Seamless Pipes?

904L seamless pipes are available under several international designations, including ASTM A312 TP 904L, UNS N08904, DIN 1.4539, ASTM B677 UNS N08904, and AISI 904L. These standards refer to the same high-alloy austenitic stainless steel, commonly used for its excellent corrosion resistance and suitability in heat exchanger and process equipment applications.

Which welding methods are recommended for Stainless Steel 904L Seamless Pipes?

Stainless Steel 904L Seamless Pipes can be welded using TIG (GTAW), MIG (GMAW), or Stick (SMAW) methods. TIG offers precise, clean welds; MIG is efficient for large-scale projects; and Stick is ideal for repairs or outdoor work. Use 904L filler rods with inert gases like Argon for shielding and proper purging to prevent oxidation and hot cracking. Pre- or post-weld heat treatment is generally not required.

What is 904L stainless steel used for?

904L stainless steel is widely used in highly corrosive environments such as chemical processing, marine, and offshore oil and gas industries. Its exceptional resistance to acids, chlorides, and pitting makes it ideal for heat exchangers, piping, and desalination systems. It is also used in pharmaceutical and food processing equipment for its cleanliness and durability, as well as in watchmaking and construction, where corrosion resistance is essential.

What is the specification of 904L pipe?

904L stainless steel pipes offer high mechanical strength and excellent corrosion resistance due to their high nickel and molybdenum content. They have a minimum tensile strength of 490 MPa, yield strength of 220 MPa, and elongation of 36%, with standards such as ASTM A312 and B677 governing their specifications. Available in seamless and welded forms, these pipes come in diameters from 6 mm to 914.4 mm and wall thicknesses between 0.6 mm and 12.7 mm, customizable to application requirements.

Is 904L steel better than 316?

Yes, 904L steel is better than 316 steel for applications requiring superior corrosion resistance in harsh chemical or high-chloride environments, due to its higher content of nickel, molybdenum, and copper. However, 316 steel is often sufficient for less severe conditions and is a more cost-effective option.

What is the difference between 304 and 904L stainless steel?

316L stainless steel, known as marine-grade steel, contains 16–18% chromium and 2–3% molybdenum, offering good corrosion and pitting resistance. However, 904L stainless steel, with higher chromium (19–23%) and molybdenum (4–5%) content, provides superior durability and corrosion resistance, making it ideal for harsh seawater and industrial environments. While 904L is costlier than 316L, its longer lifespan and lower maintenance needs make it a more cost-effective choice for marine and filtration applications.