Description

It is a CuCrZr alloy that can be hardened by cold forming and by precipitation of CuCrZr - phases during a heat treatment. It has good bendability, excellent hot and cold forming properties, a high strength and a good corrosion resistance. Due to the CrZr-precipitations the relaxation properties, even at temperatures up to 250°C are excellent. The electrical and thermal conductivity is excellent. Welding, soldering and brazing properties are good too. The alloy is registered in the US by EPA to have good antimicrobial properties.

Equivalent Materials

Properties

General

Density ρ

8.9 g/cm³ at 20 °C

Mechanical

Bendability 180°, bw r180,bw

2 [-] at 20 °C

r = x t, t <0.5mm

Bendability 180°, gw r180,gw

2 [-] at 20 °C

r = x t, t <0.5mm

Bendability 90°, bw r90,bw

1.5 [-] at 20 °C

r = x t, t <0.5mm

Bendability 90°, gw r90,gw

1.5 [-] at 20 °C

r = x t, t <0.5mm

Elastic modulus E

137 GPa at 20 °C

cold formed

Elongation A50 A50

8 % at 20 °C

Hardness, Vickers HV

150 - 190 [-] at 20 °C

Tensile strength Rm

480 - 560 MPa at 20 °C

Yield strength Rp0.2 Rp0.2

450 MPa at 20 °C

Thermal

Coefficient of thermal expansion α

1.8E-5 1/K at 300 °C

for 20°C to the mentioned temperature

Specific heat capacity cp

381 J/(kg·K) at 20 °C

Thermal conductivity λ

330 W/(m·K) at 20 °C

Electrical

Electrical conductivity σel

5.00E+7 - 5.30E+7 S/m at 20 °C

Specific Electrical conductivity

86 % IACS

Chemical properties

Element

Weight %

Comment

Cu

-

Balance

Cr

0.2 - 1.2 %

Fe

0.1 %

max.

Si

0.1 %

max.

Zr

0.05 - 0.25 %

Technological properties

Application areas

Automotive: Switches and Relays, Contacts, Connectors, Terminals, Press fits, Hybrid Cars. Electrical: Switches and Relays, Contacts, Connectors, Terminals, Press fits, Components for the electrical industry, Stamped parts, Semiconductor Components, Junction Boxes, Photovoltaic Systems.

Brazing

Excellent

Cold Forming

Good

Corrosion properties

STOL® 95 is resistant to pure water vapour and non oxidizingacids and alkalis as well as neutral saline solutions. The material is insensitive to stress corrosion cracking.

Machining

Rating 20, less suitable

Other

This alloy is in accordance with RoHS 2002/96/CE for electric & electronic equipments and 2002/53/CE for automotive industry. It is suitable for high voltage applications as hybrid cars or photovoltaics.

Plating

Electroplating is excellent

Processing history

Temper: R480

Welding

Gas Shielded Arc Welding: Excellent, Laser Welding: Fair

This material data has been provided by KME Germany.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.