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Monel Flanges

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Monel Flanges

ARK Stainless Inc. is a renowned name in manufacturing and supplying high-performance Monel 400/K500 Flanges, known for their superior strength, resistance to corrosion, and reliability in harsh environments. These flanges are meticulously designed to withstand exposure to challenging substances such as seawater, sulfuric acid, hydrofluoric acid, and alkalis, making them ideal for critical applications in both high and low-temperature environments.

We provide a diverse range of grades including Monel 400 and Monel K500, each offering distinct advantages. Monel 400 is known for its exceptional mechanical properties, such as higher tensile strength and hardness. On the other hand, Monel K500 offers superior tensile strength and yield strength, with enhanced resistance to pitting and crevice corrosion. Our Monel flanges are manufactured according to international standards, including ASTM B164 / ASME SB164, and dimension standards like ASME B16.5, B16.47 Series A & B, and MSS-SP-43, ensuring high consistency and top-tier quality.

Table of Contents

Chemical Composition of Monel Flanges

Grade Ni Fe C Mn Si Cu Al Ti S
400 63.0- 70.00 max 2.50 max 0.3 max 2.00 max 0.50 max Remainder - - 0.024 max
K500 63.0 min 05 - 2 0.25 max 1.5 max 0.5 max 27.0 - 33.0 2.3 - 3.15 0.35 - 0.85 0.010 max

Mechanical Properties of Monel Flanges

Grade Tensile (ksi) .2% Yield (ksi) Elongation % Hardness (HRb)
400 75 to 90 25 to 50 60 to 35 60 to 80
K500 Psi – 1,60,000 , MPa – 1100 Psi – 1,15,000 , MPa – 790 20 % -

Monel 400/K500 Flanges

Monel 400/K500 Flanges find extensive application across various industries and engineering sectors, including power generation, gas processing, seawater equipment, heat exchangers, chemical equipment, pulp and paper industry, pharmaceutical equipment, offshore oil drilling, and more.
We conduct several rigorous tests on these flanges to ensure their quality before delivery to our valued customers. The tests include mechanical testing, PMI testing, chemical testing, flattening tests, micro and macro examinations, and IGC testing, among others. We provide all necessary documentation and test certificates along with these flanges.


Monel 400 / K500 Flanges Equivalent Grades
STANDARD UNS WNR. JIS EN
Monel 400 N04400 2.4360 NW 4400 NiCu30Fe
Monel K500 N05500 2.4375 - -

Specification of Monel 400 / K500 Flanges
  • Monel Flanges Specification: ASTM B564 / ASME SB564
  • Dimension Standard: ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
  • Standard: ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
  • Size: 1/2" (15 NB) to 48" (1200NB)
  • Class / Pressure: 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
  • Flange Face Type: Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
  • DIN Flanges: DIN 2527, 2566, 2573, 2576, 2641, 2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637, 2638, 2673.
  • JIS Flanges: JIS B2220 5K, JIS B2220 10K, JIS B2220 16K, JIS B2220 20K
  • BS Flanges: BS4504 PN 6, BS 4504 PN 10, BS4504 PN 16, BS4504 PN 25, BS4504 PN 40, BS 4504 PN 64, BS 4504 PN 100, BS 4504 PN 160, BS 4504 PN 250, BS 10, BS Table D, BS Table E, BS Table F, BS Table H.