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TP304 GRADE STAINLESS STEEL SEAMLESS PIPE

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TP304L GRADE STAINLESS STEEL SEAMLESS PIPE
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TP316 GRADE STAINLESS STEEL SEAMLESS PIPE
TP316L GRADE STAINLESS STEEL SEAMLESS PIPE

TP316L GRADE STAINLESS STEEL SEAMLESS PIPE
TP316Ti GRADE STAINLESS STEEL SEAMLESS PIPE

TP316Ti GRADE STAINLESS STEEL SEAMLESS PIPE
TP310S GRADE STAINLESS STEEL SEAMLESS PIPE

TP310S GRADE STAINLESS STEEL SEAMLESS PIPE
TP321 GRADE STAINLESS STEEL SEAMLESS PIPE

TP321 GRADE STAINLESS STEEL SEAMLESS PIPE
904L/N08904 GRADE SS SMLS PIPE

904L/N08904 GRADE SS SMLS PIPE
S31803 GRADE Duplex SS SMLS PIPE

S31803 GRADE Duplex SS SMLS PIPE
S32205 GRADE Duplex SS SMLS PIPE

S32205 GRADE Duplex SS SMLS PIPE
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TP321 Stainless Steel Seamless Pipes from China - Trusted Suppliers & Factory for Fast Shipment

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Discover TP321 Seamless Stainless Steel Pipes & Tubes from China’s Leading Suppliers

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At ZONSUN STEEL, we are a reputable factory and exporter specializing in TP321 stainless steel seamless pipes, adhering to international standards. Our high-quality products are perfect for various industrial applications.

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We maintain a substantial stock for immediate shipment and guarantee fast delivery, ensuring that your needs are met promptly. Choose ZONSUN STEEL for all your TP321 stainless steel pipe requirements.

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    Product Detail

    Introduction

    TP321 is a titanium-stabilized austenitic stainless steel designed for enhanced resistance to intergranular corrosion, particularly in high-temperature environments. It is part of the 300-series stainless steels, closely related to 304/304L, but with the addition of titanium (Ti) to mitigate carbide precipitation during welding or prolonged exposure to elevated temperatures. Below is a concise overview of its characteristics and applications.

    Key Features

    Intergranular Corrosion Resistance
    Titanium stabilization ensures resistance to sensitization (chromium depletion) in welded or high-temperature (450°C–850°C) applications.
    High-Temperature Stability
    Maintains mechanical integrity and oxidation resistance up to 870°C (1600°F), suitable for exhaust systems, heat exchangers, and boilers.
    Weldability
    Excellent weldability without post-weld heat treatment, making it ideal for fabricated components.
    General Corrosion Resistance
    Resists oxidation, organic acids, and mildly corrosive environments, though less resistant to chlorides than 316/316L.

    Material Specification

    Standard ASTM A312/A312M
    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 Industry
    • Oil & Gas
    • Fertilizer Plant
    • Automotive & Aerospace
    • Power Generation
    • Food Processing
    • Pharmaceutical & Biotechnology
    • Pulp & Paper Industry
    • Construction & Architecture
    End Plain End, Beveled End, Threaded
    Processing Cut-to-length; Polishing.
    Inspection
    • 100% PMI TESTED
    • EN10204.3.1B MILL TEST CERTIFICATE
    • THIRD PARTY INSPECTION ACCEPTED
    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

    TP321 Chemical Composition
    HEAT NO. CHEMICAL COMPOSITION (%)
    C Mn P S Si Ni Cr N
    STAND. MIN. 9.00 17.00
    MAX. 0.08 2.00 0.045 0.030 1.00 12.00 19.00 0.10
    TP321 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)
    TP321 515 205 35 100 220
    Equivalent Grades (ASTM A312 TP321 Equivalent Grades)
    USA (ASTM/ASME/AISI) Japan (JIS) Germany (DIN/EN) China (GB) International (ISO) United Kingdom (BS) Russia (GOST)
    TP321
    UNS S32100
    321
    S32100    		 JIS G4304 X10CrNiTi18-9 (DIN)
    1.4541 (EN)    		 06Cr18Ni11Ti (NEW)
    1Cr18Ni9Ti (Old)
    S32168    		 X6CrNiTi18-10 304S12
    321S20 (historical)    		 12Х18Н10Т
    ASTM A312/A312M Standard Cold Machining Size Deviation Permitted
    ASTM A312/A312M-09 Standard Permitted Tolerance of WT and OD
    Nominal Outside Diameter Allowable deviation Nominal wall thickness 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)
    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)

    Q What is TP321 stainless steel and how does it differ from 304/304L?
    TP321 is a titanium-stabilized austenitic stainless steel. While it is closely related to the 300-series 304/304L grades, it features an addition of titanium (Ti). This addition helps mitigate carbide precipitation during welding or when exposed to high temperatures.
    Q What is the maximum service temperature for TP321?
    TP321 maintains its mechanical integrity and oxidation resistance at elevated temperatures up to 870°C (1600°F), making it highly suitable for high-temperature environments like exhaust systems, boilers, and heat exchangers.
    Q What are the mechanical properties of ASTM A312 TP321?
    According to the specifications, TP321 has a minimum tensile strength of 515 MPa, a minimum yield strength (0.2% Proof) of 205 MPa, and a minimum elongation of 35% (in 50mm). Its maximum hardness values are 100 HRB (Rockwell B) and 220 HB (Brinell).
    Q What are the equivalent international grades for ASTM A312 TP321?
    Equivalent grades include UNS S32100 (USA), JIS G4304 (Japan), 1.4541 / X10CrNiTi18-9 (Germany/EN), 06Cr18Ni11Ti / S32168 (China), X6CrNiTi18-10 (International), 304S12 / 321S20 (UK), and 12Х18Н10Т (Russia).
    Q Does TP321 require post-weld heat treatment?
    No. TP321 offers excellent weldability and does not require post-weld heat treatment, which makes it highly efficient for fabricating industrial components.
    Q What is the chemical composition requirement for Nickel and Chromium in TP321?
    Based on standard heat composition limits, TP321 requires a Nickel (Ni) content of 9.00% to 12.00% and a Chromium (Cr) content of 17.00% to 19.00%.