Strip - Durimphy® - Ni18Co9Mo5Ti0 pages

Cold Rolled Strip

Durimphy
Durimphy is a structured hardening maraging type martensitic alloy. Durimphy has a very high yield strength, is hardened by
ageing treatment (3 hours at 480° without any dim ensional change and has a very good fatigue resistance. Main
C)
applications are springs for watch industry, springs for various applications, belts for CVT transmission, rocket fins.
Chemical Composition (% weight)
Ni

Co

Mo

Ti

Fe

18

9

5

0,5

Bal

Physical properties
Density
(g/cm³)
8,1

Coefficient of Thermal
Expansion between 20
and 100°
C
-6
-1
(10 .° )
C
9,5

Melting T°
(°
C)
1430 / 1460

Resistivity at 20°C
(µΩ.cm)

Thermal
conductivity
(W/(°
Cm))

Specific heat at 20°
C
-1
-1
C
(J.Kg .° )

44

14,7

460

Mechanical properties (Typical values)

Annealed
Annealed +
ageing treatment
(3h/480°
C)

TS
(MPa)
1020

YS
(MPa)
980

1880

1860

El
(%)
7

TS

Hardness
(HV)

320

4

AFTER AGEING TREATMENT 3h AT 480°
C

TS (MPa) - YS (MPa)

Condition

2500

570

YS

2000

1500
TS
DELIVERY STATE
YS

1000

500

Durimphy can also be delivered in the hard condition when
higher mechanical properties are necessary, upon request

0

20

40

60

80

100

Degree of cold work (%)

Standard delivery form & dimensions
Form *

Thickness (mm)

Width* (mm)

Length (mm)

Temper

Coil - Sheet

0,05 to 1,5

10 to 580

500 to 3500

Annealed

0,050 to 0,50

10 to 90

-

Hard

Coil
* Depending on thickness

The data enclosed in this document are only given as indicative values and correspond to our standard product. Different specific requirement are
subject to discussion and formal approval by Aperam Alloys Imphy. For further information or special request, please contact us.

Aperam Alloys Imphy
B.P. 1
Avenue Jean Jaurès
F- 58160 Imphy

Tel + 33 3 86 21 30 00
Fax + 33 3 86 21 31 00
nickel.alloys@aperam.com
www.aperam.com/alloys-imphy

© June 2012

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