Engineered metals
for precision industries

Data sheet - ARCAP AP4 / Konstantan

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ARCAP AP4 / Konstantan
CuNi44Mn

Cu reste Ni43-45 Mn0.5-2

Chemical composition

CuBAL

Ni43-45

Zn0.2 max

Pb0.01 max

Sn0.01 max

Fe0.5 max

Mn0.5-2

S0.02 max

Co0.5 max

C0.05 max

Other1.5 max

Alloy name
RLSA no.	466
EN standard
DIN standard	2.0842
UNS no.*

*Unified Numbering System (USA)

Characteristics and main uses

Arcap AP4 / Konstantan is a completely non-magnetic copper nickel alloy with excellent corrosion resistance in various environments, including seawater.

Main uses

Marine, Military, Electrical engineering, Electronics, Watch industry, Electron tube devices, Ferrule holder, Sensors

Physical properties		Units
Density (20°C)	8,90	Kg/dm³
Melting point	1290	°C
Longitudinal elasticity modulus	145	GPa
Thermal conductivity		W/m·K
Electrical conductivity	>25	m/Ω·mm²
Electrical resistivity	<0.49	µΩ·m
Linear expansion Coefficient	17	10⁻⁶·K⁻¹
IACS (International Annealed Copper Standard)	>3.5	%
Poisson's ratio

Capabilities
Corrosion resistance	4
Hot deformation	3
Cold deformation	4
Electrodepositing
Diamond cutting
Nitriding
Mechanical polishing	4
Welding without filler	2
Brazing	4

1 poor | 2 average | 3 good | 4 very good | - no info

Heat Treatment / Hardening
Annealing temperature	550-750	°C
Temperature for stress relief treatment	300	°C
Hardening temperature		°C
Hardening treatment time		hour(s)

Alloy mechanical properties

ARCAP AP4 / Konstantan
Possible hardness range	100 - 235	HV
Possible Rm range	460 - 750	MPa

Non-exhaustive list of grades

Grade	According to standard	Hardness (HV: Vickers) min - max	Rm (MPa) min - max	Rp 0.2 (MPa) min - max	Elongation (%) where L0 = 100mm min - max	L0
mou	RLSA	≤ 140	≤ 520	≤ 300	≥ 30	50
ROB01	RLSA	140 - 180	500 - 600	≥ 300	≥ 15	50
ROB03	RLSA	175 - 205	550 - 650	≥ 450	≥ 8	50
ROB08	RLSA	≤ 225	≤ 720	≤ 670

Do not hesitate to ask us for your specific grades and parameters. We can make productions according to your needs.

Engineered metals for precision industries