Stainless Steel 304 Welded Buttweld Fittings

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ANSI B16.9 Stainless Steel 304 Welded Buttweld Fittings

Stainless Steel 304/304L/304H Buttweld Fittings are versatile fittings known for their high corrosion resistance and superior welding characteristics. The 304/304L/304H versions of stainless steel are variations of a basic 18-8 grade, where 18 represents the chromium percentage and 8 the nickel percentage.

ANSI B16.9 is a standard developed by the American National Standards Institute (ANSI) that covers the dimensions and tolerances of factory-made wrought steel buttwelding fittings such as elbows, tees, reducers, and caps. These fittings are commonly used in piping systems for changing direction, branching or for changing pipe diameter.

Stainless Steel 304 is a widely used grade of stainless steel, known for its excellent corrosion resistance and high ease of fabrication. It is one of the most common materials used for buttweld fittings.

Features of Stainless Steel 304 Welded Buttweld Fittings

  1. Corrosion Resistance: Stainless Steel 304 has excellent corrosion resistance in a wide range of environments and when in contact with various corrosive media.
  2. Ease of Fabrication: Stainless Steel 304 can be easily welded and processed by standard shop fabrication practices.
  3. Heat Resistance: 304 has good resistance to oxidation in intermittent service up to 870°C and in continuous service to 925°C.
  4. Strength: 304 stainless steel offers good strength and high toughness, even at cryogenic temperatures.
  5. Cleanability: Stainless steel 304 fittings are easy to clean and don’t easily harbor bacteria, which makes them a good choice for applications that require hygiene like food or pharmaceutical industries.

Applications

Due to their high corrosion resistance and durability, Stainless Steel 304 Welded Buttweld Fittings are used in a wide range of industrial applications, including:

  • Piping systems in the oil and gas industry
  • Chemical processing equipment
  • Food and beverage processing equipment
  • Heat exchangers
  • Architectural trim and molding
  • Pharmaceutical and textile industries

Conclusion

When you are selecting buttweld fittings for your piping system, ANSI B16.9 Stainless Steel 304 Welded Buttweld Fittings offer many advantages due to their high corrosion resistance, excellent fabrication characteristics, and durability. They are suitable for use in a wide range of applications and industries.

Specifications

  • Size: 1/8” NB TO 48” NB. (Seamless & 100% X-Ray Welded, Fabricated)
  • Standards: ASME/ANSI B16.9, ASME B16.28, MSS-SP-43
  • Thickness: 5s, 10s, 40s, 80s, 10, 20, 40, STD, 60, 80, XS, 100, 120, 140, 160, XXS available with NACE MR 01-75
  • Type: Seamless / Welded / Fabricated

Chemical Composition

Grade C Mn Si P S Cr Mo Ni N
304 max. 0.08 max. 2.0 max. 0.75 max. 0.045 max. 0.030 18.0 – 20.0 8.0 – 10.5 max. 0.10
304L max. 0.030 max. 2.0 max. 0.75 max. 0.045 max. 0.030 18.0 – 20.0 8.0 – 20.0
304H 0.04 – 0.10 max. 2.0 max. 0.75 max. 0.045 max. 0.030 18.0 – 20.0 8.0 – 10.5

Mechanical Properties

Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness: Rockwell B (HR B) max Brinell (HB) max
304 515 205 40 92 201
304L 485 170 40 92 201
304H 485 205 40 92 201

Equivalent Grades

Grade UNS No WNR. AFNOR EN JIS BS
304 S30400 1.4301 Z7CN18-09 X5CrNi18-10 SUS 304 304S31
304L S30403 1.4306 Z3CN18-10 X2CrNi18-9 / X2CrNi19-11 SUS 304L 304S11
304H S30409 1.4301

This detailed overview provides information on the specifications, chemical composition, mechanical properties, and equivalent grades for Stainless Steel 304/304L/304H Buttweld Fittings. These fittings are highly versatile and widely used in various industrial applications due to their excellent corrosion resistance and superior weldability.

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