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ASTM A312 Pipe Manufacturer & Supplier in China

    Труба ASTM A312

    ASTM A312 pipe is the standard international specification covering seamless,straight-seam welded,and heavily cold-worked austenitic трубы из нержавеющей стали engineered for high-temperature and general corrosive environments.
    ASTM A312 Pipe Factory in China
    Generally,we supply бесшовные трубы из нержавеющей стали that comply with the ASTM A312 standard in sizes ranging from 1/2″ to 24″,with wall thicknesses of SCH10S, SCH20, SCH40S/STD, SCH80S/XS, SCH30, SCH60, SCH80, SCH100, SCH120, SCH160, and XXS.
    Welded stainless steel pipes are available in sizes ranging from 1/2″ to 104″,with wall thicknesses from SCH5S to SCH80S/XS.
    If you do not find what you need here,we also offer highly customized services.Please feel free to contact us for a personalized quote.

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    Kaysuns is a professional supplier of 904L stainless steel pipes.Please feel free to contact me if you have any requirements.

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    Chemical Composition of ASTM A312 Pipe

    ASTM A312 TP304 and TP304L are austenitic stainless steels.The difference between the two lies in the upper limit of carbon and nickel content.

    ЭлементCCrNiMnSiпSNFe
    TP304≤ 0,08%18.0% – 20.0%8.0% – 11.0%≤ 2.00%≤ 1.00%≤ 0,045%≤ 0,030%≤ 0,10%Остаток средств
    TP304L≤ 0.035%18.0% – 20.0%8.0% – 13.0%≤ 2.00%≤ 1.00%≤ 0,045%≤ 0,030%≤ 0,10%Остаток средств

    ASTM A312 TP316 and TP316L are molybdenum-containing austenitic stainless steels.Compared to 304 series stainless steels,they offer superior resistance to localized pitting and chloride corrosion.Kaysuns typically supplies these grades with dual certification.

    ЭлементCПнCrNiMnSiпSNFe
    TP316≤ 0,08%2.00% – 3.00%16.0% - 18.0%10.0% - 14.0%≤ 2.00%≤ 1.00%≤ 0,045%≤ 0,030%≤ 0,10%Остаток средств
    TP316L≤ 0.035%2.00% – 3.00%16.0% - 18.0%10.0% – 15.0%≤ 2.00%≤ 1.00%≤ 0,045%≤ 0,030%≤ 0,10%Остаток средств

    ASTM A312 TP321 and TP321H are titanium-stabilized austenitic трубы из нержавеющей стали.The main difference lies in their carbon (C) content and the corresponding proportion of titanium (Ti) stabilizer.

    ЭлементCTiCrNiMnSiпSNFe
    TP321≤ 0,08%5 × (C + N) to 0.7%17.0% - 19.0%9.0% - 12.0%≤ 2.00%≤ 1.00%≤ 0,045%≤ 0,030%≤ 0,10%Остаток средств
    TP321H0,04% - 0,10%4 × C to 0.7%17.0% - 19.0%9.0% - 12.0%≤ 2.00%≤ 1.00%≤ 0,045%≤ 0,030%≤ 0,10%Остаток средств

    Standard TP347 is suitable for general chemical processing at moderate temperatures,while the high-carbon TP347H offers significantly superior creep strength and stress rupture strength under extreme temperature conditions.

    ЭлементCCb / NbCrNiMnSiпSNFe
    TP347≤ 0,08%10 × C to 1.10%17.0% - 19.0%9.0% - 12.0%≤ 2.00%≤ 1.00%≤ 0,045%≤ 0,030%Остаток средств
    TP347H0,04% - 0,10%8 × C to 1.10%17.0% - 19.0%9.0% – 13.0%≤ 2.00%≤ 1.00%≤ 0,045%≤ 0,030%≤ 0,10%Остаток средств

    ASTM A312 TP317L (UNS S31703) is a low-carbon,molybdenum-containing austenitic stainless steel pipe.It is an upgraded version of TP316L with higher alloy content and is specifically designed to withstand highly corrosive chemical media.

    ЭлементПнCrNiCMnSiпSNFe
    TP317L(S31703)3.00% – 4.00%18.0% - 20.0%11.0% - 15.0%≤ 0,030%≤ 2.00%≤ 1.00%≤ 0,045%≤ 0,030%≤ 0,10%Остаток средств

    ASTM A312 904L (UNS N08904) was originally developed for use in extremely high-concentration sulfuric acid applications.Its unique chemical composition combines very high concentrations of nickel and chromium with specific additions of molybdenum and copper.

    ЭлементNiCrПнCuCMnSiпSFe
    904L(N08904)23.0% – 28.0%19.0% – 23.0%4.00% – 5.00%1.00% – 2.00%≤ 0.020%≤ 2.00%≤ 1.00%≤ 0.040%≤ 0,030%Остаток средств

    ASTM A312 254 SMO (UNS S31254) is characterized by a significantly higher molybdenum content and the deliberate addition of nitrogen to enhance its mechanical strength and structural stability,thereby preventing alloy segregation.

    ЭлементПнCrNiNCuCMnSiпSFe
    254 SMO6.0% – 6.5%19.5% – 20.5%17.5% – 18.5%0.18% – 0.25%0.5% – 1.0%≤ 0.020%≤ 1.00%≤ 0,08%≤ 0,030%≤ 0.010%Остаток средств

    According to the ASTM A312 standard, the chemical composition limits for TP310S are as follows:

    ЭлементCrNiCMnSiпSFe
    TP310S(S31008)24.00% – 26.00%19.00% – 22.00%≤ 0,08%≤ 2.00%≤ 1.50%≤ 0,045%≤ 0,030%Остаток средств

    ASTM A312 TP316H (UNS S31609) is a high-carbon variant of molybdenum-containing austenitic stainless steel pipe.By maintaining carbon content within a specific,higher range,it offers exceptional resistance.

    ЭлементCПнCrNiMnSiпSFe
    TP316H(S31609)0,04% - 0,10%2.00% – 3.00%16.00% – 18.00%10.00% – 14.00%≤ 2.00%≤ 1.00%≤ 0,045%≤ 0,030%Остаток средств

    TP309S (UNS S30908) is a high-chromium,high-nickel austenitic stainless steel pipe.According to the ASTM A312 standard,the chemical composition limits for TP309S are as follows:

    ЭлементCrNiCMnSiпSFe
    TP309S(S30908)22.00% – 24.00%12.00% – 15.00%≤ 0,08%≤ 2.00%≤ 1.00%≤ 0,045%≤ 0,030%Остаток средств

    Mechanical Properties of ASTM A312 Pipe

    According to the ASTM A312 / ASME SA312 standards,the mechanical properties of stainless steel pipes are key indicators for determining whether they can withstand high internal pressure,external loads,and high-temperature creep.
    Under the ASTM A312 standard,all steel pipes must be in a solution-annealed condition prior to shipment,and their mechanical properties must meet the following minimum values and maximum hardness limits:
    ОценкаПредел прочностиПредел текучестиУдлинениеТвердость
    TP304 / TP316≥ 515 МПа (75 ksi)≥ 205 МПа (30 ksi)≥ 35%≤ 192 HBW (90 HRB)
    TP304L / TP316L≥ 485 МПа (70 ksi)≥ 170 МПа (25 ksi)≥ 35%≤ 192 HBW (90 HRB)
    TP321 / TP347≥ 515 МПа (75 ksi)≥ 205 МПа (30 ksi)≥ 35%≤ 192 HBW (90 HRB)
    TP321H / TP347H≥ 515 МПа (75 ksi)≥ 205 МПа (30 ksi)≥ 35%≤ 192 HBW (90 HRB)
    TP316H≥ 515 МПа (75 ksi)≥ 205 МПа (30 ksi)≥ 35%≤ 192 HBW (90 HRB)
    TP317L≥ 515 МПа (75 ksi)≥ 205 МПа (30 ksi)≥ 35%≤ 192 HBW (90 HRB)
    TP309S / TP310S≥ 515 МПа (75 ksi)≥ 205 МПа (30 ksi)≥ 35%≤ 192 HBW (90 HRB)
    904L≥ 490 MPa (71 ksi)≥ 220 МПа (32 ksi)≥ 35%90 HRB / 70 HRB
    254 SMO≥ 650 МПа (94 кси)≥ 300 МПа (44 ksi)≥ 35%≤ 250 HBW (100 HRB)

    ASTM A312 Pipe Dimensions and Tolerances

    In the international piping industry,the physical dimensions of stainless steel pipes are governed by ASME B36.19M and ASME B36.10M.The permissible dimensional deviations are strictly mandated by the ASTM A999/A999M general requirements specification,which covers ASTM A312.

    Dimensions For ASTM A312 Pipe

    НПСOD,mm5S WT,mm10S WT,mm40S WT,mm80S WT,mm
    1/8″0.405″
    10.3 mm
    0.049″
    1.24 mm
    0.068″
    1.73 mm
    0.095″
    2.41 mm
    1/4″0.540″
    13.7 mm
    0.065″
    1.65 mm
    0.088″
    2.24 mm
    0.119″
    3.02 mm
    3/8″0.675″
    17.1 mm
    0.065″
    1.65 mm
    0.091″
    2.31 mm
    0.126″
    3.20 mm
    1/2″0.840″
    21,3 мм
    0.065″
    1.65 mm
    0.083″
    2.11 mm
    0.109″
    2,77 мм
    0.147″
    3.73 mm
    3/4″1.050″
    26,7 мм
    0.065″
    1.65 mm
    0.083″
    2.11 mm
    0.113″
    2,87 мм
    0.154″
    3,91 мм
    1″1.315″
    33,4 мм
    0.065″
    1.65 mm
    0.109″
    2,77 мм
    0.133″
    3,38 мм
    0.179″
    4.55 mm
    1-1/4″1.660″
    42.2 mm
    0.065″
    1.65 mm
    0.109″
    2,77 мм
    0.140″
    3.56 mm
    0.191″
    4.85 mm
    1-1/2″1.900″
    48,3 мм
    0.065″
    1.65 mm
    0.109″
    2,77 мм
    0.145″
    3,68 мм
    0.200″
    5.08 mm
    2″2.375″
    60,3 мм
    0.065″
    1.65 mm
    0.109″
    2,77 мм
    0.154″
    3,91 мм
    0.218″
    5.54 mm
    2-1/2″2.875″
    73.0 mm
    0.083″
    2.11 mm
    0.120″
    3.05 mm
    0.203″
    5.16 mm
    0.276″
    7.01 mm
    3″3.500″
    88,9 мм
    0.083″
    2.11 mm
    0.120″
    3.05 mm
    0.216″
    5,49 мм
    0.300″
    7.62 mm
    4″4.500″
    114,3 мм
    0.083″
    2.11 mm
    0.120″
    3.05 mm
    0.237″
    6,02 мм
    0.337″
    8.56 mm
    6″6.625″
    168,3 мм
    0.109″
    2,77 мм
    0.134″
    3.40 mm
    0.280″
    7,11 мм
    0.432″
    10.97 mm
    8″8.625″
    219,1 мм
    0.109″
    2,77 мм
    0.148″
    3.76 mm
    0.322″
    8,18 мм
    0.500″
    12.70 mm
    10″10.750″
    273.0 mm
    0.134″
    3.40 mm
    0.165″
    4.19 mm
    0.365″
    9.27 mm
    0.500″
    12.70 mm
    12″12.750″
    323.8 mm
    0.156″
    3.96 mm
    0.180″
    4.57 mm
    0.375″
    9.53 mm
    0.500″
    12.70 mm

    Outside Diameter Tolerance

    NPS RangeOver Tolerance (Plus)Under Tolerance (Minus)
    1/8″ to 1-1/2″ (NPS 1/8 to 1-1/2)+1/64 in. (+0.4 mm)-1/32 in. (-0.8 mm)
    Over 1-1/2″ to 4″ (NPS 1-1/2 to 4)+1/32 in. (+0.8 mm)-1/32 in. (-0.8 mm)
    Over 4″ to 8″ (NPS 4 to 8)+1/16 in. (+1.6 mm)-1/32 in. (-0.8 mm)
    Over 8″ to 18″ (NPS 8 to 18)+3/32 in. (+2.4 mm)-1/32 in. (-0.8 mm)
    Over 18″ to 26″ (NPS 18 to 26)+1/8 in. (+3.2 mm)-1/32 in. (-0.8 mm)

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