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Cobalt-Based Strip and Foil

Cobalt-based metals are typically alloyed with chrome, nickel, iron and tungsten. They are used in challenging environments in applications that demand high temperature strength and hardness, excellent wear and corrosion resistance. We engineer strip and foil in two cobalt based alloys, L-605 L-605 and MP35N®-LTi.
Nominal Composition
Type L-605 MP35N®-LTi
Nickel 10% 35%
Tungsten 15% -
Chromium 20% 20.5%
Iron 3% Max 0.5%
Manganese 1.5% -
Carbon 0.10% 0.01%
Silicon 1% Max -
Cobalt Balance 33.5%
Molybdenum - 9.5%
Titanium - 0.01%
Boron - 0.01%

Physical Properties
L-605 MP35N®-LTi
Density 0.330 lbs/cu.in. 0.304 lbs./cu.in.
Melting Point (Approx.) 2500°F 2400°F
Electrical Resistivity
@ R.T.
88.7 Microhm•cm 103 Microhm•cm
Thermal Expansion Coefficient
(RT to 200°C)
12.9 PPM/°C 13.7 ppm/°C
Thermal Conductivity
@ R.T.
12.7 W/m•K 11.2 W/m•K
Magnetic Permeability
@ R.T.
- 1.0009

Mechanical Properties L-605
Annealed
Ultimate Tensile Strength 0.330 lbs/cu.in.
Yield Strength (0.2% Offset) 2500°F
Elongation in 2” * 88.7 Microhm•cm
Hardness 12.9 PPM/°C
Modulus of Elasticity 12.7 W/m•K

*The measured elongation will be less as thickness decreases to 0.002” and less

Mechanical Properties MP35N®-LTi
Annealed Cold Rolled Cold Rolled &
Heat Treated
Ultimate Tensile Strength 135,000 PSI 275,000 PSI 300,000 PSI
Yield Strength (0.2% Offset) 57,000 PSI 240,000 PSI 290,000 PSI
Elongation in 2” * 40% 1% 1%
Rockwell Hardness RB 94 RC 50 RC 55
Modulus of Elasticity 33.76 ksi x 103 - -

*The measured elongation will be less as thickness decreases to 0.002” and less

Disclaimer: The information contained within this data sheet is for guidance only and is not intended for warranty of individual application - express or implied.

L-605 is a registered trademark of ATI.
MP35N® - LTi is a registered trademark of SPS Technologies Inc.