vi. Monel Alloys

Monel is a common name for a group of nickel alloys that contain nickel the most with copper and other elements. The alloy is called cupronickel when the copper content exceeds nickel content. Usually, Monel contains from 52 to 67% of nickel. Monel properties and the composition make it stronger than pure nickel material. The formation could be by hot rolling or cold drawing. The cold drawn products precise in their dimensions and the hot rolled ones are much stronger.
The alloy is very resistant especially to rapid flow of sea water. This property makes it best suited for sea water and marine applications. It is easy to be welded, machined and cold worked upon this material. The Monel price per kg differs from grade to grade and from product to product. You can contact us for a price list.

There are different Monel metal grades available in the market. Each has a different composition and therefore specific mechanical properties and purposes. The grades are designated with letters and numbers. There are Alloy 400, 401, 404, 405, 450, K-500, R-405 and 502 grades available in the market. The Monel alloy chemical composition differs from grade to grade. The Alloy 400 has high strength and excellent corrosion resistance. It is used in hydrocarbon processing, marine applications and in heat exchangers.
The Alloy 401 is used especially in electric and electronic applications. It has compatible brazing properties. The Alloy 404 has low permeability and therefore it is used in electrical and electronic applications as well. The surface finish of alloy 405 is not very smooth because of the increased dose of sulfur in it, but it is very strong and is used in automatic screw machines. The Monel alloy applications differ with the grades of the alloy. Some special applications use the R-405 which is particularly resistant to hydrofluoric and hydrochloric acids.

Different types of Monel

There are different types of Metal which includes Alloy 400, Alloy 401, Alloy R-405, Alloy 450, Alloy K-500, Alloy 404 Copper-Nickel Alloy.

Monel Alloy ASTM Standard

Alloy grade	UNS designation	ASTM standard
Alloy 400	N04400	B 127, B 164 / SB 127, SB 164
Alloy 401	N04401
Alloy 404	N04404	B 164/ SB 164
Alloy K-500	N05500	B 865/ SB 865
Alloy R-405	N04405

 

Monel material specification

 

STANDARD	WERKSTOFF NR. equivalents	UNS	JIS	BS	AFNOR	EN
Alloy 400	2.4360	N04400	NW 4400	NA 13	NU-30M	NiCu30Fe
Alloy K500	2.4375	N05500	–	–	–	–

 

Properties of Monel Alloy

Characteristics

 Stronger than steel

 Highly resistant to corrosion

 Malleable

 Low coefficient of thermal expansion

 Highly resistant to alkalis

 Suitable for welded, brazed and soldere

 

Mechanical Analysis
Tensile strength, Ultimate	550 Mpa
Tensile strength, Yield	240 Mpa
Elongation at Break	48%
ELECTRICAL PROPERTIES
Electrical Resistance	5.47e-005 ohm-cm
Curie Temperature (the temperature above which a ferromagnetic substance loses its ferromagnetism)	35°C
THERMAL PROPERTIES
CTE, linear 20°C	13.9 µm/m- Deg C
Heat Capacity	0.427 J/g-Deg C
Thermal Conductivity	21.8 W/m-K
Melting Point	1300 - 1350 Deg C
Solidus	1300 Deg C
Liquidus	1350 Deg C

 

 

 

 

 

Monel Chemical Compatibility Chart

 

 

Designation	Ni%	C%	Ti%	Ai%	Co%	Cr%	V%	W%	Mo%	Cu%	Nb/Cb Ta%	Fe%	Sonstige Autres-Other %
Alloy 400	65.0	0.12	-	-	-	-	-	-	-	32.0	-	1.5	Mn 1.0
Alloy 401	43.0	0.10	-	-	-	-	-	-	-	53.0	-	0.75	Si 0.25; Mn 2.25
Alloy 404	52.0-57.0	0.15	-	0.05	-		-	-		rest/bal	-	0.50	Mn 0.10; Si 0.10;S o.024
Alloy 502	63.0-17.0	0.10	0.50	2.5-3.5	-	-	-	-	-	rest/bal	-	2.0	Mn 1.5;Si 0.5; S 0.010
Alloy K 500	64.0	0.13	0.6	2.8	-	-	-	-	-	30.0	-	1.0	Mn 0.8
Alloy R 405	66.0	0.15	-	-	-	-	-	-	-	31.0	-	1.2	Mn 1.0; S 0.04

 

BMM supplies many other non-ferrous materials. Please contact us with your requirement.