N07750 spring nickel alloy strip
N07750 is a precipitation hardening nickel alloy with good spring properties and good resistance to gas corrosion at high temperatures. Due to the grade’s low cobalt content, N07750 is particularly suitable for nuclear power applications.
Standards
- UNS: N07750
Chemical composition (nominal)
Chemical composition (nominal) %
C | Si | Mn | P | S | Cr | Ni |
≤0.030 | 0.3 | 0.6 | ≤0.015 | ≤0.010 | 16 | 72 |
Others: Fe=7.0 Al=0.7 Ti=2.5 Nb=0.8
Mechanical properties
Static strength
Nominal values at 20°C (68°F)
Condition1) | Tensile strength, Rm | Proof strength, Rp0,2a) | Elongation, A11,3 | ||
MPa | ksi | MPa | ksi | % | |
A | 800 | 116 | 340 | 49 | 52 |
AT | 1210 | 176 | 810 | 118 | 27 |
1) A = Annealed, AT = Annealed and tempered, 705°C (1300°F)/20 h
- a) R2corresponds to 0.2% offset yield strength.
1 MPa = 1 N/mm2
Physical properties
Density: 8.3 g/cm3, 0.30 lb/in3
Specific heat capacity
420 – 460 J/kg °C | in the temperature range 20 – 100°C |
540 J/kg °C | in the temperature range 50 – 900°C |
Temperature, °C | W/m °C | Temperature, °F | Btu/ft h °F |
100 | 16.3 | 210 | |
300 | 19.8 | 570 | |
500 | 25.6 | 930 | |
700 | 30.2 | 1 290 | |
900 | 37.2 | 1 650 |
Resistivity
Temperature, °C | μΩm | Temperature, °F | μΩin. |
20 | 1.20 | 70 | |
100 | 1.25 | 210 | |
200 | 1.25 | 390 | |
300 | 1.25 | 570 | |
500 | 1.30 | 930 | |
700 | 1.30 | 1 290 |
Thermal expansion, mean values in temperatur ranges ( x10-6)
Temperature, °C | per °C | Temperature, °F | per °F |
30 – 100 | 12.2 | 85 – 210 | |
30 – 300 | 13.4 | 85 – 570 | |
30 – 500 | 13.8 | 85 – 930 | |
30 – 700 | 14.9 | 85 – 1 290 | |
30 – 900 | 16.5 | 85 – 1 650 |
Permeability, mmax: 1.004