DESCRIPTION
Alloy 75 – a special heat-resistant alloy based on nickel and chromium is designed for continuous operation at temperatures up to 1100°C. It has such properties as excellent resistance to oxidizing environments at temperatures up to 1100°C, good mechanical properties at temperatures up to 1000°C, resistance to the formation of oxide on the surface at temperatures up to 1000°C, good metallurgical stability. It is melted in open electric furnaces and by using different types of melting.
Main application Alloy 75 – unloaded or low-loaded details operating in corrosive gas environments with temperatures of 550-1100°C (II group); loaded details with 100-1000 hours of work at temperatures up to 1000°C (III group). For example: flame tube, combustion chamber, flues, covers for thermocouples, etc.
CHEMICAL COMPOSITION
| Nom. composition |
С |
Si |
Mn |
S |
P |
Сr |
Ni |
Fe |
Ti |
Al |
| Min |
0.08 |
0.30 |
– |
– |
– |
19.00 |
Rest |
– |
0.20 |
– |
| Max |
0.13 |
0.70 |
1.00 |
0.010 |
0.015 |
21.00 |
5.00 |
0.60 |
0.30 |
PHYSICAL PROPERTIES
| Temperature |
20°C |
100°C |
200°C |
300°C |
400°C |
500°C |
600°C |
700°C |
800°C |
900°C |
1000°C |
| Coefficient of elasticity, 10-5 MPа |
2.21 |
2.17 |
2.11 |
2.04 |
1.97 |
1.90 |
1.82 |
1.74 |
1.65 |
1.54 |
1.40 |
| Coefficient of linear expansion, α x 10-6/К |
– |
11.70 |
12.60 |
13.20 |
13.80 |
14.30 |
14.80 |
15.40 |
16.00 |
16.60 |
17.50 |
| Thermal conductivity, W/mK |
12.10 |
13.70 |
15.60 |
17.10 |
18.80 |
20.50 |
22.60 |
24.50 |
26.40 |
28.10 |
29.90 |
| Resistance, Ω mm2/m |
1.09 |
1.10 |
1.12 |
1.15 |
1.17 |
1.17 |
1.15 |
1.15 |
1.15 |
1.15 |
1.16 |
MECHANICAL PROPERTIES
| Tensile strength, sв |
Yield strength, sT |
Elongation, d5 |
Contraction ratio, y |
Hardness |
| N/mm2(kgf/mm2) |
N/mm2 (kgf/mm2) |
% |
% |
НВ |
| > 700 (71) |
>300 (40) |
>30 |
>50 |
<230.00 |
PRODUCT RANGE
| Finish |
Thickness, mm |
Width, mm |
Length, mm |
Standard |
| Cold rolled |
0.80 – 3.90 |
710 – 1500 |
1500 – 3000 |
DIN 17742 / DIN 17750
ISO 9722 / ISO 6208 |
| Hot rolled |
2.00 – 11.00 |
710 – 1500 |
1500 – 3000 |
ANALOGUES
| W.N |
EN |
International name |
UNS |
| 2.4951 |
NiCr20Ti |
Alloy 75 |
N06075 |
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