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Engineered metals
for precision industries

Data sheet - ARCAP AP1 C

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K65
L49
S23
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ARCAP AP1 C
Cu56Ni25Zn18

Cu55-57 Ni24-26 Zn reste

Chemical composition

Cu55-57

Ni24-26

ZnBAL

Pb0.03 max

Sn0.2 max

Fe0.3 max

Mn0.5 max

Other2 max

Alloy name
RLSA no.465
EN standard
DIN standard
UNS no.*

*Unified Numbering System (USA)

Characteristics and main uses

Arcap AP1C is a completely non-magnetic copper nickel alloy with excellent corrosion resistance in various environments, including seawater.

The Arcap AP1C is often the best solution where the lead-free requirement is specified, along with corrosion resistance and non-magnetic properties.

Main uses

Watch industry, electronic 

Physical properties Units
Density (20°C) 8,80 Kg/dm³
Melting point 1170 °C
Longitudinal elasticity modulus 163-170 GPa
Thermal conductivity W/m·K
Electrical conductivity >25 m/Ω·mm²
Electrical resistivity <0.40 µΩ·m
Linear expansion Coefficient 17 10⁻⁶·K⁻¹
IACS (International Annealed Copper Standard) >4.30 %
Poisson's ratio
Capabilities
Corrosion resistance4
Hot deformation1
Cold deformation4
Electrodepositing
Diamond cutting
Nitriding
Mechanical polishing4
Welding without filler2
Brazing4

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)

Comments on heat treatments

Annealing heat treatment under neutral or reducing atmosphere - annealing temperature around 750°C, duration at temperature 15 minutes to 1 hour depending on the volumes treated. Heat treatment for stress relief of rolled, stretched, punched parts, etc. - treatment temperature 250°C, preferably under a neutral or reducing atmosphere.

Heat treatment condition

Pickling after annealing with an open flame, remove carbon deposits in a bath of 10% sulfuric acid with 2% to 3% nitric acid, then pickling in a bath containing 80% water, 9% sulfuric acid 66° Be and 11% sodium dichromate, cold or preferably hot (50 to 60°C).

Alloy mechanical properties

ARCAP AP1 C
Possible hardness range 110 - 220 HV
Possible Rm range 450 - 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 Grain size
(µm)
min - max
mou RLSA ≤ 130 ≤ 450 ≤ 300 ≥ 30 50
ROB01 RLSA 130 - 165 450 - 550 ≥ 300 ≥ 15 50
ROB02 RLSA 160 - 190 520 - 620 ≥ 400 ≥ 5 50
ROB06 RLSA 190 - 220 620 - 730 ≥ 550 ≥ 1 50
ROB08 RLSA ≥ 220 ≥ 730 ≥ 700

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

Contact us

Do not hesitate to contact us for a quote, any questions or advice. We will get back to you as soon as possible. 

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