Stainless Steel 904L Pipes Manufacturer
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Midland Alloys Inc. is a reputable Indian manufacturer and global supplier of 904L stainless steel pipes, providing precision-engineered solutions for demanding industrial settings. The austenitic, highly alloyed non stabilized stainless steel 904L has a very low carbon content and a large copper addition, which improves its ability to withstand corrosion from strong reducing acids particularly sulfuric acid. Because of its low carbon content the alloy is easy to fabricate and complies with ASTM A312 requirements. Even with less carbon, 904L stainless steel pipe still works incredibly well at high temperatures. Its exceptional resistance to stress corrosion cracking and non-magnetic nature are attributed to its high nickel content. Molybdenum enhances its defence against crevice corrosion, making it a strong candidate for general corrosion applications. Each ASTM A312 TP 904L Pipe undergoes mandatory heat treatment and mechanical testing, including tension and flattening tests, ensuring conformity to international standards and reliable performance.
Benefits of ASTM A312 UNS N08904 Seamless Pipe
- Excellent resistance to acetic, phosphoric, and sulfuric acids
- Low carbon content makes welding and fabrication simple.
- Outstanding resistance to pitting corrosion and crevices
- Preserves its structure and strength at high temperatures.
- A high nickel content encourages non magnetic behavior.
- Excellent mechanical qualities over a broad temperature range
- Long-lasting durability and superior surface finish
- Complies with ASTM A312 and other global pipe standards
Technical Specifications of Stainless Steel 904L Pipes
Seamless Pipe OD : 1/8 -12" NPS
Welded Pipe OD : 6.35 to 114.3 mm
EFW Pipe Size : 6″ NB – 24″ NB
ASTM B677, ASTM A269
Seamless, ERW, Welded, Fabricated
Round, Square, Rectangular, Hydraulic Etc
Single Random, Double Random & Cut Length.
Plain End, Beveled End, Treaded
SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, SCH 80S, SCH60, SCH80, SCH120, SCH140, SCH160, SCH XXS, SCH XS
No. 2B - Mill finish/ Matte finish, No.8 - Mirror finish, No. 4 - Brushed finish, Bright, Annealing, Polished, Mirror
Types of Stainless Steel 904L Pipes
Manufacturing Types
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Seamless PipeWeld-free, perfect for even strength and sizing precision.
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Welded PipeWelded from flat-rolled steel, widely used where economy and large sizes are required.
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ERW PipeElectric Resistance Welded (ERW) pipes provide neat, high quality weld seams and are ideal for medium-pressure applications.
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EFW PipeElectric Fusion Welded (EFW) pipes are welded by fusion welding, usually applied in larger diameters and high-demand processes.
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LSAWLongitudinal Submerged Arc Welded (LSAW) pipes provide straight seam welding which is favored for thick-wall pieces and structural requirements.
Pipe Forms
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Round PipeThe most common shape for fluid and gas transport.
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Square PipeUsed in architectural and structural applications requiring angular profiles.
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Rectangular PipeProvides greater strength in load-bearing regions and flat structures.
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Hydraulic PipeDesigned to provide precise dimensional control for fluid systems under pressure.
Contact us today to discuss how Stainless Steel 904L Pipes can benefit your application. Whether you need guidance in selecting the right pipes or have specific requirements, our team of experts is here to help you find the optimal solution.
Technical Details & Delivery Condition
| Element | C | Mn | Ni | Cr | S | Mo | N | Cu | P | Si |
| Min | – | – | 23 | 19 | – | 4 | – | 1 | – | – |
| Max | 0.2 | 2 | 28 | 23 | 0.3 | 5 | 0.1 | 2 | 0.03 | 0.7 |
| Property | Tensile Rm | R.p. 0.2% Yield | Elongation (2” or 4D gl) |
| Value | 71 ksi / 490 MPa (min) | 32 ksi / 220 MPa (min) | 35% (min) |
| Unit | ksi / MPa | ksi / MPa | % |
| Grade | UNS No | Old British BS | Old British En | Euronorm No | Euronorm Name | Swedish SS | Japanese JIS |
| 904L | N08904 | 904S13 | X1NiCrMoCu25-20-5 | 1.4539 | – | – | SUS 890L |
Stainless Steel Pipe Grades We Also Offer
Stainless Steel 904L Pipe Dimensions
| Stainless Steel 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 | 6.35 | 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 | 6.35 | 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 | 8.74 | 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 | 11.13 | 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 | 13.49 | 4 | 160 | 34.05 |
| 141.30 | 6.55 | 5 | 40S | 22.10 |
| 141.30 | 9.53 | 5 | 80S | 31.44 |
| 141.30 | 15.88 | 5 | 160 | 49.87 |
| 168.28 | 3.40 | 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 | 18.26 | 6 | 160 | 68.59 |
| 219.08 | 8.18 | 8 | 40S | 43.20 |
| 219.08 | 12.70 | 8 | 80S | 65.63 |
| 219.08 | 18.23 | 8 | 120 | 91.30 |
| 219.08 | 23.01 | 8 | 160 | 112.97 |
Stainless Steel 904L Thickness Chart
| Nominal size [inches] | Outside diameter [inches] | Outside diameter [mm] | Wall thickness [inches] | Wall thickness [mm] | Weight [lb/ft] | Weight [kg/m] |
| 1/8 | 0.405 | 10.3 | 0.095 | 2.41 | 0.31 | 0.47 |
| 1/4 | 0.54 | 13.7 | 0.119 | 3.02 | 0.54 | 0.8 |
| 1/2 | 0.84 | 21.3 | 0.147 | 3.73 | 1.09 | 1.62 |
| 3/4 | 1.05 | 26.7 | 0.154 | 3.91 | 1.47 | 2.2 |
| 1 | 1.315 | 33.4 | 0.179 | 4.55 | 2.17 | 3.24 |
| 1 1/4 | 1.66 | 42.2 | 0.191 | 4.85 | 3 | 4.47 |
| 1 1/2 | 1.9 | 48.3 | 0.2 | 5.08 | 3.63 | 5.41 |
| 2 | 2.375 | 60.3 | 0.218 | 5.54 | 5.02 | 7.48 |
| 2 1/2 | 2.875 | 73 | 0.276 | 7.01 | 7.66 | 11.41 |
| 3 | 3.5 | 88.9 | 0.3 | 7.62 | 10.25 | 15.27 |
| 3 1/2 | 4 | 101.6 | 0.318 | 8.08 | 12.5 | 18.63 |
| 4 | 4.5 | 114.3 | 0.337 | 8.56 | 14.98 | 22.32 |
| 5 | 5.563 | 141.3 | 0.375 | 9.53 | 20.78 | 30.97 |
| 6 | 6.625 | 168.3 | 0.432 | 10.97 | 28.57 | 42.56 |
| 8 | 8.625 | 219.1 | 0.5 | 12.7 | 43.39 | 64.64 |
| 10 | 10.75 | 273 | 0.594 | 15.09 | 64.43 | 96.01 |
| 12 | 12.75 | 323.8 | 0.688 | 17.48 | 88.63 | 132.08 |
| 14 | 14 | 355.6 | 0.75 | 19.05 | 106.13 | 158.1 |
| 16 | 16 | 406.4 | 0.844 | 21.44 | 136.61 | 203.53 |
| 18 | 18 | 457 | 0.938 | 23.83 | 170.92 | 254.55 |
| 20 | 20 | 508 | 1.031 | 26.19 | 208.87 | 311.17 |
| 24 | 24 | 610 | 1.125 | 30.96 | 296.58 | 442.08 |
How SS 904L Pipes Are Manufactured
Round Bar
Analytic
Cut to Length
Centering
Heating
Perforation
Inspection of Size
Pickling
Inspection of Surface
Lubricating
Cold Drawing (Cold Rolling)
Degreasing
Annealing
Straightening
Cut
Pickling / Passivating
Inspection
Analytic
Marking
Packing & Shipping
Applications of Stainless Steel 904L Pipes
Because of their superior mechanical integrity and resistance to corrosion stainless steel 904L pipes are used in many different industries. They are widely used to move corrosive and acidic materials in chemical processing facilities. Under sanitization procedures 904L guarantees durability and hygienic conditions in pharmaceutical equipment. These pipes provide thermal stability and resistance to chemical attack are also essential components of condensers and heat exchangers. The alloy is a great option for desalination plants and marine environment because of its high resistance to seawater and chlorides. Because 904L is long lasting and resistant to acidic bleaching agents, it is used in the pulp and paper industries.
Difference Between Stainless Steel 904L Pipes and 304 Stainless Steel Pipes
While SS 304 is a standard-grade stainless steel suitable for general corrosion conditions, Stainless Steel 904L Pipes are designed for much more aggressive environments. Their chemical composition is the primary difference; 904L has more nickel (23–28%) and copper (1–2%), which gives it better resistance to strong acids, particularly sulfuric acid. In addition 904L is more resistant to pitting and crevice corrosion than SS 304. When it comes to strength and temperature tolerance 904L holds up well in hotter environments where 304 might not. ASTM A312 TP 904L Pipes are more dependable under challenging operating conditions because they are less likely to crack due to stress corrosion.
Why Choose Midland Alloys Inc. for 904L Stainless Steel Pipe
Midland Alloys Inc. is a leading Indian manufacturer and exporter of high quality Stainless Steel 904L Pipes, known for precision manufacturing and full compliance with ASTM, EN, and ISO 9001:2015 standards. Cut-to-length sizing SS 904L Pipe HS Code compliance, customized schedules, and a variety of surface finishes are some of the custom solution we provide. Serving customers in the Gulf, Europe, Africa and Southeast Asia, we have a strong global supply footprint. Every SS 904L seamless pipe is put through a rigorous internal testing process, obtains mill certifications and is available for third party inspection upon request. Supported by technical know-how and committed customer service, we guarantee on-time delivery for both small-batch and bulk exports. Pipes are labeled in accordance with ASTM A312 and ASTM SA312 standards and come with Mill Test Certificates (MTCs) attesting to complete mechanical and chemical traceability.
FAQs
Refer to the 904L SS Pipe Pressure Chart for accurate pressure data based on size and schedule.
No, ASTM A312 UNS N08904 Seamless Pipe is non-magnetic due to its high nickel content.
We offer AISI 904L Polished Pipe, WNR 1.4539 Welded Pipe, DIN 1.4539 Cold-Finished Pipe Origin and more.
They meet SS 904L Pipe Manufacturing Standards including ASTM A312, ASME SA312, and EN 10216.
The SS 904L Pipe HS Code commonly used in India is 73044100 (for seamless stainless pipes).
Yes, we offer customised lengths, surface finishes, and AISI 904L Clad Pipe solutions for specialised projects.
