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904L SS SMLS PIPE CUSTOM PACKING WOODEN CASE.jpg
904L SS SMLS PIPE FULLY DOCUMENTED SHIPMENT.jpg
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904L Stainless Steel Seamless Pipe - China Suppliers & Factory - Fast Delivery Available

ZONSUN STEEL, a leading factory and supplier in China, specializes in the stock and export of high-quality 904L stainless steel seamless pipes. Our products are manufactured according to international standards, ensuring durability and reliability. With a robust inventory available for immediate shipment, we guarantee fast delivery to meet your urgent needs. Choose ZONSUN STEEL for all your stainless steel pipe requirements and experience unparalleled service and quality directly from the trusted suppliers in China
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    Product Detail

    Introduction

    ASTM A240/A240M 904L/N08904 Stainless steel seamless pipes are the pinnacle of corrosion-resistant alloys, engineered to thrive in highly aggressive media such as sulfuric acid, chlorides, and seawater. With 19%-23% chromium, 23%-28% nickel, 4%-5% molybdenum, and 1%-2% copper, this super-austenitic stainless steel delivers unmatched resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC), outperforming conventional 316/316L alloys.

    Key Features

    Extreme Corrosion Resistance
    Exceptionally high PREN (≥37) ensures reliability in sulfuric acid, phosphoric acid, and chloride-rich environments (e.g., marine, desalination).
    Acid Compatibility
    Copper addition enhances resistance to reducing acids like sulfuric at all concentrations.
    Robust Mechanical Properties
    Tensile strength ≥490 MPa, yield strength ≥220 MPa, maintaining integrity under high-pressure flows.

    Material Specification

    Standard ASTM A240/A240M
    O.D 1/8" NB TO 32" NB, (10.29MM-812.80MM), (Customization Available)
    W.T SCH 10S, SCH 40S, SCH 80S, SCH160, SCH XXS (Customization Available)
    Application
    • Chemical & Petrochemical Processing Equipment
    • Sulfuric & Phosphoric Acid Plants
    • Seawater & Desalination Systems
    • Pharmaceutical & Food Processing
    • Oil & Gas (Sour Service Applications)
    • Pollution Control & Scrubber Systems
    • Heat Exchangers & Condensers
    End Plain End, Beveled End, Threaded
    Processing Cut-to-length; Polishing.
    Inspection
    • 100% PMI (Positive Material Identification) Tested
    • EN 10204 3.1/3.2 Mill Test Certificate
    • Third-Party Inspection Accepted (SGS, BV, TUV, etc.)
    • Hydrostatic Testing & Ultrasonic Testing Available
    • Intergranular Corrosion Test per ASTM A262
    Delivery Condition Cold Drawn, Annealed and Pickled / Polished / Bright Annealed / Sand blasting / Shot Blasting.
    Marking All SS SMLS Pipes are marked as follows: Standard, Grade, OD, Thickness, Length, Heat No. (Or as per the customer’s request)
    Packing Packed in Wooden Boxes, plywood cases, Steel Strips Bundled, or as per Customers Requests
    Specials Sizes and Specifications other than above can be customized on request.

    Specification Parameters

    904L/N08904 Chemical Composition
    HEAT NO. CHEMICAL COMPOSITION (%)
    C Mn P S Si Ni Cr Mo N Cu
    STAND. MIN. - - - - - 23.00 19.00 4.00 - 1.00
    MAX. 0.02 2.00 0.045 0.035 1.00 28.00 23.00 5.00 0.1 2.00
    904L/N08904 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 90 187
    Equivalent Grades (ASTM B677 UNS N08904 (904L) Equivalent Grades)
    ISO EN (Europe) DIN (Germany) JIS (Japan) GB (China) UNS (USA) AISI/SAE
    X1NiCrMoCu25-20-5 (ISO 15510) 1.4539 (EN 10088-2) X1NiCrMoCu25-20-5 (DIN 17440) SUS 890L (JIS G3463) 015Cr21Ni26Mo5Cu2 (GB/T 14976) N08904 904L
    ASTM A312/A312M Standard Cold Machining Size Deviation Permitted
    ASTM A312/A312M-09 Standard Permitted Tolerance of OD ASTM A312/A312M-09 Standard Permitted Tolerance of WT
    Nominal Outside Diameter (inch/mm) Allowable Deviation (mm) Nominal Wall Thickness (inch/mm) Allowable Deviation (%)
    1/8" - 1 1/2" (10.29 - 48.26) +0.4 -0.8 1/8" - 1 1/2" (10.29 - 73.03) all of t +20 -12.5
    >1 1/2" - 4" (48.26 - 114.3) ±0.8 3" - 18" (88.9 - 457.2) t/D=5% +22.5 -12.5
    >4" - 8" (114.3 - 219.08) +1.6 -0.8 3" - 18" (88.9 - 457.2) t/D>5% +15 -12.5
    >8" - 18" (219.08 - 457.2) +2.4 -0.8 ≥20" =508 t of wld pipe +17.5 -12.5
    >18" - 26" (457.2 - 660.4) +3.2 -0.8 ≥20" =508 t/D=5% +22.5 -12.5
    >26" - 34" (660.4 - 863.6) +4.0 -0.8 ≥20" =508 t/D>5% +15 -12.5
    >34" - 48" (863.6 - 1219.2) +4.8 -0.8 - - -
    Thin wall pipe (t/D=3%) ovality condition: Any cross section in a steel pipe Dmax Dmin=1.5% nominal, and (Dmax Dmin)/2 conforms to the stipulated diameter tolerance range.
    Comparison Table Of American Standard Dimensions - (ANSI B36.19 & ANSI B36.10) (Refers to ASTM A312)
    OD DN IN OD MM ANSI B36.19 ANSI B36.10
    Nominal diameter in inches
    5s 10s Sched.40s Sched.40 Sched.80s Sched.80 10 20 30 Standard
    mm Kg/m mm Kg/m mm Kg/m mm mm Kg/m mm mm Kg/m mm Kg/m mm Kg/m mm Kg/m
    6 1/8" 10.29 - - 1.24 0.281 1.73 371 1.73 2.41 0.467 2.41 - - - - - - 1.73 0.371
    8 1/4" 13.72 - - 1.65 0.499 2.24 0.644 2 3.02 0.809 3.02 - - - - - - 2.24 0.644
    10 3/8" 17.14 - - 1.65 0.64 2.31 0.858 2.31 3.2 1.118 3.2 - - - - - - 2.31 0.858
    15 1/2" 21.34 1.65 0.814 2.11 1.016 2.77 1.26 2.77 3.73 1.62 3.73 - - - - - - 2.77 1.26
    20 3/4" 26.67 1.65 1.034 2.11 1.298 2.87 1.68 2.87 3.91 2.19 3.91 - - - - - - 2.87 1.68
    25 1" 33.4 1.65 1.312 2.77 2.125 3.38 2.5 3.38 4.55 3.23 4.55 - - - - - - 3.36 2.5
    32 1 1/4" 42.16 1.65 1.674 2.77 2.732 3.56 3.38 3.56 4.85 4.46 4.85 - - - - - - 3.56 3.38
    40 1 1/2" 48.26 1.65 1.926 2.77 3.155 3.68 4.05 3.68 5.08 5.4 5.08 - - - - - - 3.68 4.05
    50 2" 60.32 1.65 2.424 2.77 3.992 3.91 5.43 3.91 5.54 7.47 5.54 - - - - - - 3.91 5.43
    65 2 1/2" 73.02 2.11 3.747 3.05 5.345 5.16 8.62 5.16 7.01 11.4 7.01 - - - - - - 5.16 8.62
    80 3" 88.9 2.11 4.585 3.05 6.557 5.49 11.28 5.49 7.62 15.25 7.62 - - - - - - 5.49 11.28
    90 3 1/2" 101.6 2.11 5.272 3.05 7.526 5.74 13.56 5.74 8.08 18.62 8.08 - - - - - - 5.74 13.56
    100 4" 114.3 2.11 5.945 3.05 8.496 6.02 16.06 6.02 8.56 22.29 8.56 - - - - - - 6.02 16.06
    125 5" 141.3 2.77 9.639 3.4 11.74 6.55 21.76 6.55 9.52 30.92 9.52 - - - - - - 6.55 21.76
    150 6" 168.28 2.77 11.514 3.4 14.037 7.11 28.23 7.11 10.97 42.52 10.97 - - - - - - 7.11 28.23
    200 8" 219.08 2.77 15.049 3.76 20.334 8.18 42.49 8.18 12.7 64.57 12.7 - - 6.35 33.28 7.04 36.8 8.18 42.4
    250 10" 273.05 3.4 23.028 4.19 28.29 9.27 60.24 9.27 12.7 81.46 15.09 - - 6.35 41.7 7.8 51 9.27 60.24
    300 12" 323.85 3.96 31.806 4.57 36.633 9.52 73.76 10.31 12.7 97.36 17.48 - - 6.35 49.68 8.38 65.14 9.52 73.76
    350 14" 355.6 3.98 34.99 4.78 42.102 9.52 - 11.13 - - 19.05 6.35 54.63 7.92 67.98 9.52 81.21 9.52 81.21
    400 16" 406.4 4.19 42.35 4.78 48.22 9.52 - 12.7 - - 21.44 6.35 62.58 7.92 77.9 9.52 93.13 9.52 93.18
    450 18" 457.2 4.19 47.7 4.78 54.3 9.52 - 14.27 - - 23.82 6.35 70.5 7.92 87.8 11.13 122.12 9.52 105.05
    500 20" 508 4.77 60.32 5.54 69.766 9.52 - 15.09 - - 26.19 6.35 78.47 9.52 116.97 12.7 155 9.52 116.97
    550 22" 558.8 4.77 - 5.54 - 9.52 - - - - 28.58 6.35 86.42 9.52 128.89 12.7 170.86 9.52 128.89
    600 24" 609.6 5.54 84.1 6.35 96.215 9.52 - 17.48 - - 30.96 6.35 96.215 9.52 140.8 14.7 209.54 9.52 140.81
    650 26" 660.4 - - - - 9.52 - - - - - 7.92 127.58 12.7 202.65 - - 9.52 152.73
    700 28" 711.2 - - - - 9.52 - - - - - 7.92 137.52 12.7 218.54 15.88 271.94 9.52 164.65
    750 30" 762 6.35 120.59 7.92 147.45 9.52 - - - - - 7.92 147.45 12.7 234.44 15.88 291.81 9.52 176.57
    800 32" 812 - - - - 9.52 - 17.48 - - - 7.92 157.39 12.7 250.33 15.88 311.67 9.52 188.5
    850 34" 863.6 - - - - 9.52 - 17.48 - - - 7.92 167.32 12.7 266.22 15.88 331.54 9.52 200.42
    900 36" 914.4 - - - - 9.52 - 19.05 - - - 7.92 177.26 12.7 282.18 15.88 351.41 9.52 212.34

    Frequently Asked Questions (FAQ)

    What are the main chemical elements in ASTM A240 904L / N08904 stainless steel?
    ASTM A240 904L is a super-austenitic stainless steel containing 19%-23% Chromium, 23%-28% Nickel, 4%-5% Molybdenum, and 1%-2% Copper. It features a low Carbon content (maximum 0.02%).
    What makes 904L seamless pipes superior in acid applications?
    The addition of 1%-2% copper to 904L stainless steel greatly enhances its resistance to reducing acids, specifically sulfuric acid, across all concentrations. It is also optimized for phosphoric acid plants.
    What are the mechanical properties of 904L stainless steel seamless pipes?
    904L stainless steel seamless pipes offer a minimum tensile strength of 490 MPa, a minimum yield strength (0.2% Proof) of 220 MPa, and a minimum elongation of 35%. The maximum hardness is 90 Rockwell B (HR B) or 187 Brinell (HB).
    In which industries and applications are N08904 pipes commonly used?
    They are widely used in chemical & petrochemical processing, sulfuric & phosphoric acid plants, seawater & desalination systems, pharmaceutical & food processing, oil & gas (sour service), pollution control scrubber systems, and heat exchangers.
    What testing and inspections are performed on these pipes?
    Inspection options include 100% PMI testing, EN 10204 3.1/3.2 Mill Test Certification, hydrostatic testing, ultrasonic testing, intergranular corrosion testing per ASTM A262, and third-party inspections by agencies like SGS, BV, or TUV.
    What are the international equivalent grades for UNS N08904 (904L)?
    Equivalent grades include X1NiCrMoCu25-20-5 (ISO 15510 & DIN 17440), 1.4539 (EN 10088-2), SUS 890L (JIS G3463), and 015Cr21Ni26Mo5Cu2 (GB/T 14976).