Stainless Steel 347/347H Electropolished Pipes & Tubes


Dimension and wall thickness

Pipe diameters

Stainless Steel 347 347H Electropolished Pipes & Tubes
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    Stockist & Supplier of Stainless Steel 347 / 347H Electropolished Pipes & Tubes

    Alloy 347/347H Electropolish Pipes and Tubes, which is a columbium/tantalum stabilized austenitic chromium-nickel alloy. Stainless Steel 347 Electropolish Pipes is stabilized against chromium carbide formation by the addition of columbium and tantalum. Since these elements have a stronger affinity for carbon than chromium in Stainless Steel 347 Electropolish Tubes, columbium – tantalum carbides precipitate within the grains instead of forming at the grain boundaries.

    Stainless Steel 347H Sanitary Tubes can be successfully welded using most standard arc welding processes, where pre–heating, and post-heating are not required and should be avoided. When a filler Stainless Steel 347H Smooth Finish Pipes is needed, a matching composition rod will provide the best match in thermal expansion properties.

    Stainless Steel 347 Sanitary Tubes is non-magnetic and is stabilized by the addition of columbium and tantalum. Stainless Steel 347 Sanitary Pipes should be considered for applications requiring intermittent heating between 800 Degree F (427 Degree C) and 1650 Degree F (899 Degree C) or for welding under conditions which prevent a post-weld anneal. If a matching composition is not available a high nickel filler metal can be used, where these Stainless Steel 347H Smooth Finish Tubes will result in a weld with different thermal expansion properties.

    Stainless Steel 347 Smooth Finish Pipes is a stabilized stainless steel that offers excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 Degree F to 1500 Degree F. 347H Stainless Steel Electropolish Pipes is often utilized in process streams containing chlorides or halides. The addition of molybdenum in 347H Stainless Steel Electropolish Tubes improves general corrosion and chloride pitting resistance.

    Stainless Steel 347 Electropolished Tubes is capable of attaining a wide range of strength and toughness properties depending on the precipitation or aging temperature used in hardening. Stainless Steel 347H Inside Polished Pipes resists atmospheric corrosion, as well as, moderately oxidizing and reducing environments. Stainless Steel 347H Inside Polished Tubes has excellent resistance to intergranular corrosion in the as-welded condition.

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    Stainless Steel 347/347H Electropolished Pipe / Tube Specifications



    ASTM A/ASME SA249/A269/A270



    ASTM, ASME, and API

    SS 304H Tubes Size


    1/8″NB TO 30″NB IN



    1mm to 20mm, SCH 5/5S, 10/10S, 20/20S, 40/40S, 80/80S, 120/120S, 160/160S as per ANSI B36.19/36.10



    BA Finish inside and outside, Electropolished finish inside and outside



    Electropolished Pipes & Tubes



    Round, Square, Rectangular, Hydraulic Etc



    Up to 6 meters, custom cut lengths

    Chemical Composition Of Stainless Steel 347/347H Electropolished Pipes

    Grade C Mn Si P S Cr Cb Ni Fe
    SS 347 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 17.00 – 20.00 10xC – 1.10 9.00 – 13.00 62.74 min
    SS 347H 0.04 – 0.10 2.0 max 1.0 max 0.045 max 0.030 max 17.00 – 19.00 8xC – 1.10 9.0 -13.0 63.72 min

    ASME SA312 SS 347/347H Electropolished Tube Mechanical Properties

    Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
    8.0 g/cm3 1454 °C (2650 °F) Psi – 75000, MPa – 515 Psi – 30000, MPa – 205 35 %

    Equivalent Grades Of Stainless Steel 347/347H Electropolished Pipes

    SS 347 1.4550 S34700 SUS 347 08Ch18N12B X6CrNiNb18-10
    SS 347H 1.4961 S34709 SUS 347H X6CrNiNb18-12

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