CrN75TBU (circle, wire, tube, sheet, strip) (ei869)
Technical Characteristics
This heat resistant nickel-based alloy is used in the manufacture of flat springs, rotors, disks, fasteners and various other parts that must operate at temperatures up to +650°C. The alloy is also used in the production of parts of pipe fittings and welded assemblies.
| Alloy | Standard | GOST |
|---|---|---|
| Heat treatment of materials | В04 | According to ST CKBA 016-2005 |
| Bar sections | В32 | According to specification 14-1-272-72 |
Percent composition, GOST-5632-72.
| S | Si | Cr | Ni | C | Ba | Fe | P | Mn | Al | Ce |
|---|---|---|---|---|---|---|---|---|---|---|
| ≤0.02 | ≤0.8 | 15 - 18 | 55 - 58 | ≤0.1 | ≤0.1 | 19.13 - 27.4 | ≤0.02 | ≤0.3 | 2.6 - 3.5 | ≤0.03 |
Physical properties.
| 1/Gradus | Ohm-m | W/(m-grad) | kg/m3 | degree | MPa |
|---|---|---|---|---|---|
| a 10 6 | R 10 9 | l | r | t° | E 10- 5 |
| 15.88 | 47.4 | 900 | |||
| 15.18 | 40.2 | 800 | 1.69 | ||
| 15.11 | 34.5 | 700 | |||
| 14.59 | 29.3 | 600 | |||
| 14.22 | 24 | 500 | |||
| 14.2 | 19.6 | 400 | |||
| 13.42 | 15.9 | 300 | |||
| 13.08 | 13 | 200 | |||
| 12.28 | 10.5 | 100 | |||
| 7900 | 20 | 2.1 |
Physical characteristics of the alloy:
| Description | Designation |
|---|---|
| 1st kind modulus of elasticity, [MPa] | E |
| Heat capacity of material (or heat transfer coefficient), in [W/(m-cold)] | l |
| Temperature, required to obtain the given properties, [°C] | T |
| Linear coefficient of thermal expansion in [1/°C] (temperature range 20o C), | a |
| electrical resistivity, [Ohm-m] | R |
| Density of the given material, [kg/m3] | r |
| material specific heat capacity in [J/(kg-grad)] (temperature range 20oC) | C |
Magnetic characteristics:
| Description | Designation |
|---|---|
| Coercive force (not higher), in [ A/m] | Hc |
| magnetic permeability (not higher), in [ MHN/m] | Umax |
| specific loss (not higher) frequency 50 Hz, magnetic induction 1.0 Tesla, in [ W/kg ] | P1.0/50 |
| Tl - magnetic induction magnetic field strength not less than 100, in the magnetic field, in [ A/m] | B100 |
Mechanical characteristics of the alloy at 20 °C .
| Products | Heat treatment | % | kJ/m2 | MPa | MPa | % | mm |
|---|---|---|---|---|---|---|---|
| - | - | y | KCU | s in | sT | d5 | Size |
| As per |
Hardened at 1050° - 1090°C | 740 | 345-390 | 35 |
Mechanical Specifications:
| Description | Designation |
|---|---|
| Ultimate short-term tensile strength, in [MPa] | In |
| Yield strength (limit of proportionality) for permanent deformation, in [MPa] | sT |
| at break relative elongation, in [ % ] | d5 |
| relative contraction, in [ % ] | y |
| impact toughness, in [kJ/m2] | KCU |
Supplier
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