BrAJN10-4-4 - CuAl10Ni5Fe4 sheet, strip, tube

International Equivalent

Mark Analogue W. Nr. Aisi Uns En Order
BRAZHN10-4-4 CuAl10Ni5Fe4 Delivery from the stock, in stock

Industrial applications: parts of chemical apparatus

Class: Bronze ash-free bronze, machined under pressure

Chemical properties of BrAZHN10-4-4 grade alloy, in percent.

Designation Description
Si up to 0.1
Fe 3,5 - 5,5
Mn up to 0.3
P up to 0.01
Ni 3,5 - 5,5
Cu 77,4 - 83,5
Al 9,5 - 11
Pb up to 0.02
Sn up to 0.1
Zn up to 0,3

Useful information and properties:

Melting point, °C: 1084

Hardness of the alloy: HB 10 -1 = 130 - 150 MPa

The coefficient of friction without lubrication is 0.23

Coefficient of friction with grease is 0.011

Mechanical characteristics of BrAJHN10-4-4 alloy at 20°C

Rolled product δ5 (%) (%) - grad. sT (MPa) σ in (MPa) Size KCU (kJ/m2) ψ %
soft alloy 35-45 450-550
hard alloy 9-15 750-830

Features of aluminum bronzes

A peculiarity of aluminum bronzes is that iron significantly increases their mechanical characteristics by refining the grain, which provides delayed recrystallization. To improve the strength properties aluminum-iron bronze is subjected to aging at 250-300 ° C two to three hours after hardening at t° 950 ° C. It is used in the production of worms, gears, bushings, screw nuts, valve seats, usually in the aviation industry.

Nickel contributes to mechanical properties, heat resistance, increases corrosion resistance and recrystallization temperature of aluminum bronzes, low-temperature stability and antifriction properties. Aluminum-iron-nickel bronzes are used for valve guides, bushings, gears and other critical parts, usually in the aviation industry.

Manganese enhances technological and corrosion properties of bronzes. Aluminum-iron-nickel bronzes are perfectly machined under pressure in cold and hot condition. They are used for production of gears, worm screws, bushings, and in marine construction - for parts operating at temperatures up to 250 °C.

Physical characteristics of BrAZHN10-4-4 grade alloy

a 10 6 (1/Grad) E 10- 5 (MPa) T (Grad) l (W/(m-grad)) R 10 9 (Ohm-m) C (J/(kg-grad)) r (kg/m3)
1.15 20 80 190 7500
17.1 100
Description Designation Description Designation
- Tensile strength (tensile strength), in MPa σ in - relative slump at cracking, in % å
- elastic limit, in MPa σ0,05 - torsional strength limit (ultimate tangential stress), in MPa
- yield strength, in MPa σ0,2 - bending strength limit, in MPa σd
- relative elongation after rupture, in % δ5,δ4,δ10 - endurance limit at symmetrical bending cyclic load, in MPa σ-1
- compression (yield strength), in MPa σcj0,05 and σcj - torsional symmetrical cyclic load endurance limit, MPa J-1
- shear displacement, in % ν - number of load cycles n
- short-term strength limit, in MPa s in - electrical resistivity, in Ohm-m R and ρ
- relative contraction, in % ψ - nominal elastic modulus, in GPa E
- impact toughness for specimens with concentrators according to species V and U, in J/cm2 KCU and KCV - Test temperature, °C T
- yield strength - permanent deformation (limit of proportionality), in MPa sT - thermal conductivity coefficient, in W/(m- °С) l and ë
- Brinell hardness HB - specific heat capacity in [J/(kg-rad) C
- Vickers hardness HV - specific gravity kg/m3 pn and r
- Rockwell hardness, Sc. HRCe - coefficient of linear thermal expansion (1/°C)
- HRB Rockwell hardness, Sc. HRB - Longitudinal strength limit (MPa) σtT
- Shore hardness HSD - modulus of elasticity (torsional shear) GPa

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