KVN Steels a prominent manufacturer and supplier of premium-grade Monel 400 and K500 pipes and tubes, catering to diverse industrial requirements across India, the United Arab Emirates (UAE), the Kingdom of Saudi Arabia, Kuwait, the State of Qatar, the Sultanate of Oman, as well as key regions in Iran and Iraq. These nickel-copper alloy pipes are manufactured in a wide range of wall thicknesses, diameters, and lengths to meet both standard and project-specific demands. Engineered to offer exceptional durability and resistance to harsh service environments, they are ideal for use in industries requiring stable performance under demanding mechanical and chemical conditions.

Technical Overview

Monel 400 and K500 grades, primarily composed of nickel and copper, are engineered for exceptional corrosion resistance in harsh marine and chemical environments. These alloys retain high mechanical strength across a broad temperature range—from cryogenic conditions to elevated thermal applications. The K500 variant, developed through age-hardening, builds upon Monel 400’s inherent strength while maintaining superior resistance to hydrofluoric and sulfuric acids, high-pressure steam, and alkaline media. Additionally, both grades offer excellent weldability, particularly with gas tungsten arc welding (GTAW), and feature low magnetic permeability along with excellent dimensional stability. Their robust corrosion resistance makes them ideal for demanding sectors such as shipbuilding, offshore platforms, desalination plants, heat exchangers, power generation, and chemical processing. Complementing these, Copper Nickel pipes and tubes provide strong performance against seawater corrosion, biofouling, and stress cracking, offering long-term durability in similarly extreme environments. For businesses seeking dependable solutions across aggressive operational conditions, KVN Steels also offers a comprehensive selection of stainless steel, duplex, and alloy steel piping systems tailored to meet critical industrial needs.

Applications & Industry Use

Due to their outstanding corrosion resistance and structural integrity, Monel 400/K500 pipes and tubes are extensively used in marine engineering, offshore drilling systems, chemical processing plants, and petroleum refining units. They are well-suited for service in heat exchangers, boiler feed systems, gasoline and freshwater storage tanks, and high-performance pump and valve components. These alloys are particularly favored in environments involving high salinity, caustic solutions, and fluctuating pressure and temperature conditions—making them indispensable in oil & gas infrastructure, power generation, and naval applications.

400/K500 Monel Pipes and Tubes Equivalent Grades

STANDARD	UNS	WNR.	EN	JIS	GOST	AFNOR	BS
Monel 400	N04400	2.4360	NiCu30Fe	NW 4400	МНЖМц 28-2,5-1,5	NU-30M	NA 13
Monel K500	N05500	2.4375	-	-	-	-	-

Monel 400/K500 Seamless Pipes

Nickel Alloy UNS N04400 Seamless Pipes, DIN 2.4360 Seamless Pipes, Monel UNS N05500 Seamless Piping, DIN 2.4375 Seamless Pipe, ASTM B165 Monel 400 Seamless Pipe

Monel 400/K500 Seamless Tubes

DIN 2.4375 Seamless Tube, ASTM B163 Monel K500 Seamless Tubes, DIN 2.4360 Seamless Tubes, UNS N04400 / N05500 Seamless Tubing

Monel 400/K500 Welded Pipes

ASTM B725 / ASME SB725 Monel 400 Welded Pipes Supplier, UNS N04400 Welded Pipe, Alloy UNS N05500 Welded Pipes, DIN 2.4360 / 2.4375 Welded Pipe

Monel 400/K500 Welded Tubes

DIN 2.4360 Welded Tubing, DIN 2.4375 Welded Tube, ASTM B730 / ASME SB730 Monel K500 Welded Tubes, UNS N04400 / N05500 Welded Tubes

Monel Alloy ERW Pipes

ASTM B725 Monel K500 ERW Pipes, DIN 2.4375 ERW Piping, Alloy UNS N04400 / N05500 ERW Pipe, DIN 2.4360 ERW Pipes

400/K500 Monel ERW Tubes

ASTM B730 Monel® Alloy K500 ERW Tubes, DIN 2.4375 ERW Tube, Nickel UNS N04400 / N05500 ERW Tubes, ASME SB730 Monel 400 ERW Tubing

Monel Seamless Pipes and Tubes :

ASTM B165, B163 / ASME SB165, SB163

Monel Welded Pipes and Tubes :

ASTM B725 , ASME SB725 / ASTM B730, ASME SB730

Pipe Size :

Seamless 1/2" - 10" , Welded 1/2" - 48".

Tube Size :

4 to 219mm W. T.: 0.5 to 20mm

Schedule : :

SSCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS

Type :

Seamless / ERW / Welded / Fabricated Pipes

Form :

Round, Square, Rectangular, Oval, Hydraulic Etc

Length :

Single Random, Double Random & Required Length

End :

Plain End, Beveled End, Treaded

End Protection :

Plastic Caps

Delivery Condition :

Annealed and Pickled, Polished, Bright Annealed, Cold Drawn

Inspection, Test Reports :

Mill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, PMI Test Reports, Visual Inspection Reports, Third Party Inspection Reports, NABL Approved Lab Reports, Destructive Test Report, Non Destructive Test Reports

Packing :

Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests

Specials :

Sizes and Specifications other than above can be manufactured on request

Chemical Composition of Monel 400/K500 Seamless and Welded Pipes / Tubes

Grade	Ni	Fe	C	Mn	Si	Cu	Al	Ti	S
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
400	63.0- 70.00 max	2.50 max	0.3 max	2.00 max	0.50 max	Remainder	-	-	0.024 max

Mechanical Properties Of Monel 400/K500 Pipes and Tubes

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 %	-

Physical Properties of Monel 400 Pipes And Tubes

Density@ Room Temp	0.318 lb/in3
Elastic Modulus @ 70ºF tension	26.0 x 106psi
Specific Heat @ 70 F	0.102 Btu/lb/ F
Melting Point	2370 F to 2460 F
Thermal Conductivity @ 70 F	151 Btu in/h/ft 2 / F
Electrical Resistivity @ 70 F	0.511 μ Ω m