Premium Monel 400/K500 Buttweld Pipe Fittings by Ratnadeep Steel & Engg. Co.
Ratnadeep Steel & Engg. Co. is a trusted manufacturer, exporter, & supplier of Monel 400 and Monel K500 Buttweld Pipe Fittings. Manufactured from high-performance nickel-copper alloys, these fittings provide outstanding resistance to corrosion in seawater, hydrofluoric acid, alkalis, and a wide range of aggressive chemical environments. Monel alloys are known for their excellent strength, toughness, and durability across both sub-zero and elevated temperature conditions.
Monel 400 offers exceptional resistance to corrosion and stress corrosion cracking, while Monel K500, a precipitation-hardened alloy, delivers higher mechanical strength, superior fatigue resistance, and excellent wear properties. These characteristics make Monel buttweld fittings ideal for demanding applications in marine engineering, offshore oil & gas platforms, chemical processing plants, heat exchangers, and pump and valve systems. All fittings are manufactured with precisely machined bevel ends to ensure sound, full-penetration welds and long-term service reliability.
Designed for smooth flow, reduced pressure drop, and high operational efficiency, our Monel 400 / K500 buttweld pipe fittings are widely used in seawater handling systems, desalination plants, hydrocarbon processing, pressure vessels, and high-stress industrial piping networks. Choose Ratnadeep Steel & Engg. Co. for premium-quality Monel buttweld fittings that comply with international standards and stringent quality control requirements.
- Monel 400 90 Deg Elbow
- Monel K500 45 Deg Elbow
- UNS N04400 180 Deg Elbow
- UNS N05500 LR Elbow
- DIN 2.4360 SR Elbow
- ANSI B16.9 Alloy 400 90 Degree Short Radius Elbow
- Monel K500 45 Deg Long Radius Elbow
- ASME B16.9 Monel 400 Equal Tee
- UNS N05500 Pipe Tee
- DIN 2.4360 Butt weld Tee
- ASME SB366 Monel K500 Reducing Tee manufacturer
- DIN 2.4375 Unequal Tee
- Alloy UNS N05500 Straight Tee
- ASTM B366 Monel 400 Eccentric Reducer Supplier
- B16.9 Monel K500 Eccentric Reducer
- Alloy UNS N04400 / N05500 Eccentric Reducers
- DIN 2.4360 / 2.4375 Eccentric Reducer
- ANSI B16.9 Monel 400 Concentric Reducer Supplier
- ASME SB366 Monel K500 Concentric Reducer
- Alloy UNS N04400 / N05500 Concentric Reducers
- DIN 2.4360 / 2.4375 Concentric Reducer
- ASME B16.9 Monel Alloy 400 Long Stub End Supplier
- ASTM B366 Monel K500 Long Stub Ends
- Alloy UNS N04400 / N05500 Lap Joint Stub End
- DIN 2.4360 / 2.4375 Long Stub End
- ASTM B366 / SB366 Monel 400 Short Stub End Supplier
- ASME B16.9 Monel Alloy K500 Short Stub Ends
- Alloy UNS N04400 / N05500 Short Stub Ends
- DIN 2.4360 / 2.4375 Short Stub End
- ASTM B366 / SB366 Monel 400 Pipe Cap Supplier
- ASME B16.9 Monel Alloy K500 End Pipe Cap
- Alloy UNS N04400 Pipe End Cap
- UNS N05500 Buttweld Cap
- DIN 2.4360 / 2.4375 End Cap
- ASTM B366 / SB366 Monel 400 Equal Cross
- ASME B16.9 Monel Alloy K500 Buttweld Cross
- Alloy UNS N04400 / N05500 Unequal Cross
- DIN 2.4360 / 2.4375 Reducing Cross
- ASME SB 366 Monel Alloy 400 Pipe Bend Exporter
- B16.9 Monel K500 Piggable Bend
- Alloy UNS N04400 / N05500 U Bend
- DIN 2.4360 Long Radius Bend
- DIN 2.4375 Buttweld Bend
CHEMICAL COMPOSITION OF MONEL 400/K500 SEAMLESS AND WELDED PIPE FITTINGS
| Grade | Ni | Fe | C | Mn | Si | Cu | Al | Ti | S |
|---|---|---|---|---|---|---|---|---|---|
| Monel 400 | 63.0-70.0 | 2.50 max | 0.3 max | 2.00 max | 0.50 max | Remainder | – | – | 0.024 max |
| Monel K500 | 63.0 min | 0.5-2.0 | 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 ASME SB366 MONEL BUTTWELD PIPE FITTINGS
| Grade | Tensile (ksi) | 0.2% Yield (ksi) | Elongation % | Hardness (HRb) |
|---|---|---|---|---|
| Monel 400 | 75 to 90 | 25 to 50 | 60 to 35 | 60 to 80 |
| Monel K500 | Psi – 160,000, MPa – 1100 | Psi – 115,000, MPa – 790 | 20% | – |
SPECIFICATION OF MONEL ALLOY BUTTWELL FITTINGS
| Specifications | ASTM B366 / ASME SB366 |
|---|---|
| Dimensions | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS4504, BS1560, BS10 ASME 16.11, MSS SP-79, 83, 95, 97, BS 3799 |
| Size | Seamless Butt Weld Fittings: ½” to 10″ | Welded Butt Weld Fittings: ½” to 48″ |
| Schedule | SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75 |
| Bending Radius | R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom |
| Type | Seamless / ERW / Welded / Fabricated |
| Thickness | 20 Swg., 18 Swg., 16 Swg., 14 Swg., 12 Swg., 10 Swg., & Sch. 10, Sch. 40, Sch. 80 etc. |
400/K500 MONEL ASTM B366 BUTTWELD FITTINGS EQUIVALENT GRADES
| STANDARD | UNS | WNR. | EN | JIS | GOST | AFNOR | BS |
|---|---|---|---|---|---|---|---|
| Monel 400 | N04400 | 2.4360 | NiCu30Fe | NW 4400 | MHXMu 28-2,5-1,5 | NU-30M | NA 13 |
| Monel K500 | N05500 | 2.4375 | – | – | – | – | – |
PHYSICAL PROPERTIES OF MONEL 400 & K500 BUTTWELD FITTINGS
| Property | Monel 400 | Monel K500 |
|---|---|---|
| Density @ Room Temperature | 0.318 lb/in³ | 8.43 g/cm³ (0.305 lb/in³ approx) |
| Elastic/Young’s Modulus | 26.0 × 10⁶ psi | 179 × 10³ N/mm² |
| Specific Heat @ 20°C (68°F) | 0.102 Btu/lb/°F | 418 J·kg⁻¹·°K⁻¹ |
| Melting Point | 2370°F to 2460°F (1300°C to 1350°C) | – |
| Thermal Conductivity @ 20°C (68°F) | 151 Btu·in/h·ft²·°F | 17.5 W·m⁻¹·°K⁻¹ |
| Electrical Resistivity @ 20°C (68°F) | 0.511 μΩ·m | 0.62 μΩ·m |
| Mean Coefficient of Thermal Expansion (20-100°C) | – | 13.4 × 10⁻⁶ °K⁻¹ |
| Magnetic Permeability @ 20°C | – | <1.005 |
| Curie Temperature | – | -90°C |
💡 Practical Difference in Use
Use Monel 400 / K500 Buttweld Pipe Fittings when: exceptional resistance to seawater corrosion, hydrofluoric acid, alkalis, and reducing chemical environments is required. Monel nickel-copper alloys provide excellent mechanical strength, toughness, and durability across a wide temperature range. → Example: marine engineering, offshore oil & gas platforms, desalination plants, chemical processing units, pump and valve systems, and heat exchangers.
Applications of Monel 400 / K500 Buttweld Pipe Fittings
Monel Buttweld Pipe Fittings are engineered for high-performance service in highly corrosive, marine, and high-stress environments.
- Marine & Offshore Industries: Seawater piping, offshore platforms, and shipbuilding applications.
- Chemical Processing: Handling of acids, alkalis, and aggressive chemical media.
- Oil & Gas Systems: High-strength piping, valves, and pressure-containing components.
When to Choose Monel 400 / K500?
These Monel grades are ideal for applications requiring superior corrosion resistance, high mechanical strength, and long-term reliability in harsh environments.
Choose Monel 400 / K500 when:
- Exposure to seawater, brine, or marine atmospheres is continuous
- Resistance to hydrofluoric acid and alkaline media is required
- High mechanical strength and fatigue resistance are essential (Monel K500)
- Piping systems face high pressure and dynamic loading conditions
- Used in offshore, marine, chemical, or oil & gas installations
Industries That Use Monel 400 / K500 Buttweld Pipe Fittings
Monel fittings are widely used in industries demanding excellent corrosion resistance, mechanical strength, and reliability in aggressive environments.
Ideal for continuous exposure to seawater and marine atmospheres.
Uses
Seawater piping, offshore structures, and marine heat exchangers.
Why Monel?
Outstanding resistance to seawater corrosion and stress corrosion cracking.
Designed for aggressive chemical service conditions.
Uses
Chemical transfer lines, reactors, and acid handling systems.
Why Monel?
Excellent resistance to hydrofluoric acid, alkalis, and reducing agents.
Preferred for high-strength and corrosion-resistant piping.
Uses
Valves, pumps, pressure piping, and offshore oil & gas systems.
Why Monel?
Provides superior strength and durability under high-pressure conditions.
Usage Guide for Monel 400 / K500 Buttweld Pipe Fittings
Directional flow change in seawater, marine, and chemically aggressive piping systems.
Choose Elbow when
- 45°, 90°, or 180° directional change is required
- System is exposed to seawater, brine, or hydrofluoric acid
- High strength and corrosion resistance are required
- Used in marine, offshore, or chemical processing systems
Strong and corrosion-resistant branch connections for harsh service conditions.
Choose Tee when
- Branch or distribution piping is required
- Resistance to seawater and chemical attack is critical
- High-pressure or dynamic loading conditions exist
- Used in offshore, marine, or oil & gas plants
Prevents air or vapor pockets in marine and chemical piping systems.
Choose Eccentric Reducer when
- Installed in horizontal pipelines or pump suction lines
- Corrosion resistance to seawater or chemicals is required
- Flow stability and cavitation prevention are important
- Used in offshore or desalination systems
Uniform diameter transition in vertical or high-pressure piping systems.
Choose Concentric Reducer when
- Vertical pipe alignment is required
- Uniform flow transition is essential
- High-pressure service conditions exist
- Used in marine or chemical processing plants
Allows easy dismantling in corrosion-resistant lap joint assemblies.
Choose Long Stub End when
- Frequent inspection or maintenance is required
- High corrosion resistance at flange joints is essential
- Large-diameter or high-pressure pipelines are installed
- Used in marine or offshore installations
Compact lap joint solution for space-constrained piping systems.
Choose Short Stub End when
- Installation space is limited
- Economical flange connections are required
- Used in desalination or chemical plants
- Resistance to seawater corrosion is necessary
Seals pipe ends in highly corrosive and marine environments.
Choose Pipe Cap when
- Pipe ends need secure closure
- Used for pressure testing or future expansion
- Leak-tight sealing in seawater systems is required
- Installed in offshore or chemical piping
Multi-directional flow distribution in complex piping networks.
Choose Cross when
- Four-way branch connections are required
- Used in marine, offshore, or oil & gas plants
- High-strength welded joints are critical
- Corrosion resistance in aggressive environments is needed
Large-radius bends for smooth flow in seawater and process systems.
Choose Pipe Bend when
- Gradual directional change is required
- Pressure loss must be minimized
- Used in offshore, desalination, or marine piping
- Long-term corrosion resistance is essential
Our Buttweld Pipe Fittings are manufactured using advanced processes and undergo extensive quality checks to ensure flawless weldability, durability, and long service life. Each fitting is thoroughly inspected using key NDT techniques such as radiographic testing (RT), ultrasonic testing (UT), hydrostatic testing, and visual/dimensional examination. We also perform detailed chemical composition analysis and mechanical property testing to ensure material compliance with strict industry standards.
Throughout the forming and welding stages, every buttweld fitting is monitored closely to eliminate defects such as misalignment, surface irregularities, and wall-thickness variations. This ensures perfect joint integrity and high-performance reliability in pipelines carrying high temperatures, pressures, and corrosive media. All our buttweld fittings fully comply with ASME, ASTM, MSS-SP, and related global specifications, making them a preferred choice for critical piping systems worldwide.
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