Stainless Steel Buttweld Fittings Suppliers & Manufacturers in India

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    Stainless Steel Buttweld Fittings are manufactured and supplied to meet the highest standards of strength, durability, and long operational life. As a dependable manufacturer, supplier, and exporter, these fittings are produced in compliance with international quality norms while remaining cost-effective for industrial applications. Designed to offer leak-free joints and excellent corrosion resistance, stainless steel buttweld fittings are widely used in sectors where safety, reliability, and performance are essential. Industries such as oil & gas, power plants, chemical processing, and marine engineering rely on these fittings for consistent performance in demanding environments.
    Our range of SS Buttweld Fittings is available, including elbows, tees, reducers, stub ends, caps, and crosses, supplied in both seamless and welded constructions. Stainless Steel Buttweld Pipe Fittings are suitable for applications ranging from high-pressure pipeline systems to low-maintenance utility lines. Whether the requirement is a SS Buttweld Elbow for directional flow changes, a Stainless Steel Seamless Pipe Fitting for strength-critical services, or a welded buttweld fitting for economical installations, the product range is designed to cover diverse industrial needs.
    Each Stainless Steel Buttweld Fitting is manufactured in accordance with international standards such as ASTM A403 and ASME SA403, with sizes available from ½” NB to 48” NB and schedules ranging from Sch 5S to XXS. SS Seamless Buttweld Pipe Fittings are preferred for applications requiring superior strength, while SS Welded Buttweld Pipe Fittings are widely used for their flexibility and cost efficiency. With strict quality checks, testing procedures, and complete material traceability, these fittings deliver dependable performance along with long-term operational confidence.

    Types Of Stainless Steel Buttweld Fittings

    • SS 90 & 45 Deg Elbows
    • SS Long & Short Radius Elbows
    • SS Equal & Unequal Tees
    • SS Concentric & Eccentric Reducer
    • SS Equal & Unequal Cross
    • SS Bends
    • SS Short & Long Stub Ends
    • SS Pipe End Caps
    • SS Piggable Bends
    • SS Seamless Buttweld Pipe Fittings
    • SS Welded Buttweld Pipe Fittings
    • SS Split Tees

    Stainless Steel Buttweld Fittings Specifications

    Feature

    Details

    Standards

    ASTM A403 / ASME SA403, ASME B16.9 / B16.28

    Size Range

    ½” NB – 48” NB

    Schedules

    Sch 5 / 5S, 10 / 10S, 20, 40 / 40S, STD, XS, 60, 80 / 80S, 100, 120, 140, 160, XXS

    Grades

    WP 304, 304L, 304H, 316, 316L, 316H, 317, 317L, 321, 310, 347, 904L

    End Types

    Bevelled, Plain End, Threaded (NPT/BSPT/BSPP)

    Forms

    Elbow, Tee, Reducer, Stub-End, Cap, Cross, Bend

    Stainless Steel Buttweld Fittings Material Equivalents

    Below is a comparison of equivalent material grades for stainless steel buttweld fittings across various international standards:

    ASTM / ASME (USA)

    UNS (Unified Numbering System)

    EN / DIN / Werkstoff No. (Europe)

    JIS (Japan)

    BS (British Standard)

    ASTM A403 WP304

    S30400

    1.4301 / X5CrNi18-10

    SUS 304

    304S31

    ASTM A403 WP304L

    S30403

    1.4306 / 1.4307 / X2CrNi18-9

    SUS 304L

    304S11

    ASTM A403 WP304H

    S30409

    1.4948 / X6CrNi18-11

    -

    304S51

    ASTM A403 WP316

    S31600

    1.4401 / 1.4436 / X5CrNiMo17-12-2

    SUS 316

    316S31 / 316S33

    ASTM A403 WP316L

    S31603

    1.4404 / 1.4435 / X2CrNiMo17-12-2

    SUS 316L

    316S11 / 316S13

    ASTM A403 WP316H

    S31609

    -

    -

    -

    ASTM A403 WP316Ti

    S31635

    1.4571 / X6CrNiMoTi17-12-2

    SUS 316Ti

    320S31

    ASTM A403 WP321

    S32100

    1.4541 / X6CrNiTi18-10

    SUS 321

    321S31

    ASTM A403 WP347

    S34700

    1.4550 / X6CrNiNb18-10

    SUS 347

    347S31

    ASTM A403 WP904L

    N08904

    1.4539 / X1NiCrMoCu25-20-5

    SUS 890L

    -

    ASTM A815 WP-S / WP-W (Duplex)

    S31803 / S32205

    1.4462 / X2CrNiMoN22-5-3

    SUS 329J3L

    -

    ASTM A815 WP-S / WP-W (Super Duplex)

    S32750

    1.4410 / X2CrNiMoN25-7-4

    -

    -

    Stainless Steel Buttweld Fittings Chemical Composition

    Grade

    C (max)

    Cr

    Ni

    Mo

    Other Elements

    WP304

    0.08

    18.0-20.0

    8.0-11.0

    -

    Si: ≤1.0, Mn: ≤2.0

    WP304L

    0.035

    18.0-20.0

    8.0-13.0

    -

    Si: ≤1.0, Mn: ≤2.0

    WP316

    0.08

    16.0-18.0

    10.0-14.0

    2.0-3.0

    Si: ≤1.0, Mn: ≤2.0

    WP316L

    0.035

    16.0-18.0

    10.0-14.0

    2.0-3.0

    Si: ≤1.0, Mn: ≤2.0

    WP321

    0.08

    17.0-19.0

    9.0-12.0

    -

    Ti: ≥5xC, Si: ≤1.0, Mn: ≤2.0

    Stainless Steel Buttweld Fittings Mechanical Properties

    Grade Tensile Strength (min.) Yield Strength (min.) Elongation (min.) % Hardness (max.) HRB
    MPa ksi MPa ksi
    WP304 485 70 170 25 35 92
    WP304L 485 70 170 25 35 92
    WP316 485 70 170 25 30 95
    WP316L 485 70 170 25 30 95
    WP321 485 70 170 25 35 95
    WP347 485 70 170 25 35 95

    Physical Properties of Stainless Steel Buttweld Fittings

    Property

    Value

    Density

    7.9 g/cm³

    Melting Point

    1400–1450 °C

    Thermal Conductivity

    16.2 W/m-K (at 100 °C)

    Electrical Resistivity

    0.072 ×10⁻⁶ Ω-m

    Modulus of Elasticity

    193 GPa

    Applications of Stainless Steel Buttweld Fittings

    Stainless steel buttweld fittings are widely used for their strength, corrosion resistance, and ability to form leak-proof joints in demanding piping systems. These fittings are commonly applied across the following industries:
    • Oil & Gas Pipelines:
      Used in upstream, midstream, and downstream pipelines for handling high pressure and corrosive environments.
    • Chemical & Petrochemical Plants:
      Suitable for transporting aggressive chemicals, acids, and solvents while maintaining process safety.
    • Power Generation:
      Applied in steam lines, boiler feed systems, and cooling water pipelines exposed to high temperatures and pressure.
    • Food & Beverage Processing:
      Preferred for hygienic and sanitary piping in dairies, breweries, and food production units.
    • Marine & Offshore Applications:
      Used in shipbuilding and offshore structures due to excellent seawater corrosion resistance.
    • Water Treatment & Desalination:
      Ideal for freshwater, wastewater, and desalination piping systems resisting chloride attack.