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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 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 GOST 24 982-81, sheet 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


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