904l Stainless Steel Pipe

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Stainless Steel 904L Pipes are high-alloy austenitic pipes known for their excellent corrosion resistance and durability in harsh conditions. These pipes contain elements like carbon, manganese, nickel, chromium, sulfur, molybdenum, nitrogen, copper, phosphorus, and silicon, which together enhance strength and resistance to aggressive chemicals. With a tensile strength of 490 MPa, yield strength of 220 MPa, and elongation of 35%, these pipes perform well under pressure and high temperatures. These pipes are reliable for heavy-duty projects due to their high density, superior electrical resistance, and thermal conductivity. Preston Alloys is a prominent SS 904L pipe supplier that provides products fulfilling rigorous quality and performance standards. The alloy is a reliable choice in industries requiring both strength and corrosion resistance due to its mechanical balance and physical stability.


Stainless Steel 904L Pipe offers high resistance to pitting, stress corrosion cracking, and crevice corrosion, even in strong reducing acids. Its resilience makes it suitable to be used in the long term in chemical process plants, offshore gas and oil platforms, pharmaceutical machinery, and marine environments. The material can hold strength at high and low temperatures, making it a reliable option in varied operating conditions. Its non-magnetic nature in most conditions and ability to withstand chloride attack further increase its value for specialized industrial use.


Stainless Steel 904L Pipes

904L pipes are available in different forms like ERW, seamless, welded, and EFW types. The sizes vary from 4 mm to 1219.2 mm in outside diameter, and the wall thickness varies from 0.1 mm to 60 mm, with customized options available. The pipes are available in different schedules, including SCH 10, SCH 40, SCH 80, and SCH 80S. The pipes are also available with a bright, cold finish as well as annealed, polished, and pickled surfaces. Manufacturing processes, including cold rolling, hot rolling, hot forming and cold forming offer dimensional accuracy and uniform quality. Round, square, rectangular and box sections are among the shapes that offer flexibility for various fluid transport and structural requirements.


To ensure adherence to worldwide requirements, each batch of 904L pipes is undergoes rigorous quality testing including third party inspections. Tests confirm mechanical strength, chemical balance, and surface integrity. Packaging is done in wooden boxes, plastic bags, or steel strip bundles, with additional options available as per customer requests. The combination of careful testing, secure packaging, and proven performance makes these pipes a dependable choice for critical applications. Contact now to get high-quality stainless steel 904L pipes for industrial needs.


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Specification of SS 904L Pipe

Specifications ASTM B673, B677 / ASME SB673, SB 677
Dimensions ASTM, ASME and API
SS 904L Pipes 1/2″ NB – 16″ NB
ERW 904L Pipes 1/2″ NB – 24″ NB
EFW 904L Pipes 6″ NB – 100″ NB
Size 1/8″NB TO 30″NB IN
Specialized in Large Diameter Size
Schedule SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Type Seamless / ERW / Welded / Fabricated / LSAW Pipes
Form Round, Square, Rectangular, Hydraulic Etc
Length Single Random, Double Random & Cut Length.
End Plain End, Beveled End, Treaded

SS 904L Pipe Manufacturing Standards

ASTM ASME
A358 TP904L SA358 TP904L
A312 TP904L SA312 TP904L
A213 TP904L SA213 TP904L
A269 TP904L SA269 TP904L
A249 TP904L SA249 TP904L
A409 TP904L SA409 TP904L
A813 TP904L SA813 TP904L
A376 TP904L SA376 TP904L
A814 TP904L SA814 TP904L
A511 TP904L SA511 TP904L
A554 TP904L SA554 TP904L
A632 TP904L SA632 TP904L
A778 TP904L SA778 TP904L
A688 TP904L SA688 TP904L

Dimensions of SS 904L Pipes

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

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Weight Chart of Stainless Steel 904l Welded Pipes

NPS OD WT   Weight Weight
mm in mm in SCH Lb/ft kg/Mtr
1" 33 1.315 3.378 0.133 40 STD 1.679 2.501
      4.547 0.179 80 STD 2.172 3.325
3/4" 27 1.050 2.870 0.113 40 STD 1.131 1.684
      3.912 0.154 80 STD 1.474 2.195
1 1/4" 42 1.660 3.556 0.140 40 STD 2.273 3.385
      4.851 0.191 80 STD 2.997 4.464
2" 60 2.375 3.912 0.154 40 STD 3.653 5.441
      5.537 0.218 80 STD 5.022 7.480
1 1/2" 48 1.900 3.683 0.145 40 STD 2.718 4.048
      5.080 0.200 80 STD 3.361 5.409
2 1/2" 73 2.875 5.516 0.203 40 STD 5.793 8.629
      7.010 0.276 80 STD 7.661 11.411
4" 114 4.500 6.020 0.237   10.790 16.073
      8.560 0.337   14.983 22.318
1/2" 21 0.840 2.769 0.109 40 STD 0.851 1.268
      3.734 0.147 80 STD 1.088 1.621
3" 89 3.500 5.486 0.216 40 STD 7.576 11.284
      7.620 0.300 80 STD 10.253 15.272
6" 168 6.625 4.775 0.188   12.924 19.252
      5.563 0.219   14.983 22.318
      5.516 0.203   13.923 20.739
      6.350 0.250   17.021 25.354
      7.925 0.312   21.036 31.334
      7.112 0.280 40 STD 18.974 58.263
      9.525 0.375   25.031 37.285
      12.700 0.500   32.708 48.719
      10.973 0.432 80 XHY 28.573 42.561

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Schedule of 904L SS Pipe

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

Tolerance Chart of ASTM A312 TP 904L Seamless Pipe

OD (mm) Tolerance (mm)
60 and above +/- 0.25
38 to 60 +/- 0.20
35 to 38 +/- 0.15
4 to 35 +/- 0.08

Temperature Range of ASTM B677 TP 904L Pipe

Temperature (°F) Btu/(lb °F) Temperature (°C) J/(kg °C)
1300 0.15 700 615
1200 0.15 600 605
1000 0.14 500 590
800 0.14 400 570
600 0.13 300 545
400 0.12 200 515
200 0.12 100 485
68 0.11 20 460

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Have a look at 904L SS Pipe Pressure Chart

OD (in.) WT (inch)
.120 .109 .095 .083 .065 .049 .035 .028
Pressure (psig)
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

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Check SS 904L Pipe Surface Finish

Surface Finish Internal Surface Exterbal Surface
Roughness Average Roughness Average
μm μ inch μm μ inch
BA Beight-Annealed 1.0,0.6,0.8,0.5 40,25,32,20 0.8 32
AP Annealed-Pickled Not defined Not defined 1.0 or Not defined 40 or Not defined
EP Electro-Polish 0.38,0.20,0.25;0.13 15,7,10,5 0.8 32
MP Mechanical-Polish 1.0,0.6,0.8,0.5 40,25,32,20 0.8 32

Diff Stainless Steel 904L Pipe Types

SUS 904L Pipe Decorative Pipe

SS 904L Hot Finished Pipe

DIN 1.4539 Cold-Finished Pipe

AISI 904L Annealed Pipe

904L Stainless Steel Round Pipe

ASME SA 312 N08904 Square Pipe

904L SS Rectangular Pipe

AISI 904 Polished Pipe

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Refer Alloy 904L Pipe Chemical Composition

C Cr Cu Mn Mo Ni P S
Max     Max     Max Max
0.02 19.0-23.0 2.0 4.0-5.0 23.0-28.0 0.045 0.035 1.0

View 904l Pipe Mechanical Properties

Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) Brinell (HB)
904L 490 220 35 70-90 typical
Rockwell Hardness value range is typical only; other values are specified limits.

SS 904L Properties

Property Unit Value
Density kg/dm³ 8
Modulus of elasticity GPa 195
Thermal conductivity W/m°C 15.8
Thermal Capacity J/kg°C 450
Electrical resistivity µΩm 1
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SS 1.4539 Pipe of Welding Material

  •  ISO 14343 S 20 25 5 Cu L/ AWS A5.9 ER385
  •  TIG/ GTAW or MIG/ GMAW Filler Metal
  •  ISO 14343 S 20 25 5 Cu L electrodes -wire or strip
  •  ISO 3581 E 20 25 5 Cu N L R/ AWS A5.4 E385-16
  •  MMA/ SMAW

Equivalent Material of 904L Stainless Steel Material Grade

Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
904L N08904 904S13 X1NiCrMoCu25-20-5 1.4539 SUS 890L

Industrial Application of Stainless Steel 904L Pipes