BrAZh9-4
BrAZh9-4 Steel Supplier in India – Russian Metals
BrAZh9-4 (БрАЖ9-4 / CuAl9Fe3) is a tin-free aluminum bronze with excellent strength, wear resistance, and corrosion protection. Russian Metals supplies certified BrAZh9-4 alloy for demanding aerospace and industrial applications.
INTRODUCTION TO BrAZh9-4
BrAZh9-4 (БрАЖ9-4 / CuAl9Fe3) is a tin-free aluminum bronze alloy valued for its excellent strength, wear resistance, and outstanding corrosion protection in aggressive working environments. At Russian Metals, we supply certified BrAZh9-4 alloy to aerospace, marine, oil-and-gas, and heavy industrial sectors where components must perform reliably under friction, seawater exposure, and dynamic mechanical loads. Thanks to its high aluminum content and iron reinforcement, BrAZh9-4 offers superior hardness, good fatigue resistance, and long service life, making it suitable for manufacturing bushings, bearings, valve components, hydraulic fittings, ship parts, and precision wear-resistant hardware.
| Grade : | BrAZh9-4 ( 5pAX9-4 ) ( CuA19Fe3 ) |
| Classification : | Tin-free pressure-worked bronzes |
What Is BrAZh9-4 Steel?
BrAZh9-4 is a copper-based aluminum bronze containing approximately 9–10% aluminum and 2–4% iron. Its combination of mechanical strength, heat resistance, and anti-friction properties makes it suitable for aircraft engine parts, turbines, bearings, and heavy-duty bushings.
Chemical Composition (%): Cu (84–90), Al (8–10), Fe (2–4), with trace Si, Mn, Pb, Zn.
Standards: GOST 1628-78 | UNS C61900 equivalents.
Key Properties of BrAZh9-4
Mechanical Strength & Durability
Tensile strength: 540 MPa (hard) / 400–500 MPa (soft).
Yield strength: up to 700 MPa after heat treatment.
Elongation: 4–35% depending on temper.
Heat & Wear Resistance
Maintains performance under high temperature and friction.
Brinell hardness: 100–200 HB depending on condition.
Corrosion Protection
Excellent resistance to seawater, lubricated friction, and industrial atmospheres.
Friction coefficient: 0.004 (lubricated) / 0.18 (dry).
Chemical composition in % for grade BrАZH9-4 ( БрАЖ9-4 )
| Fe | Si | Mn | P | Al | Cu | Pb | Zn | Sn | Impurity |
|---|---|---|---|---|---|---|---|---|---|
| 2 - 4 | max 0.1 | max 0.5 | max 0.01 | 8 - 10 | 84.3 - 90 | max 0.01 | max 1 | max 0.1 | all 1.7 |
Applications of BrAZh9-4 Alloy
Aerospace Components: Engine bushings, turbine bearings, and electrical contact elements.
Marine & Industrial Equipment: Propeller parts, pump shafts, and wear plates.
Automotive & Heavy Machinery: High-load bearings, sliding parts, and gears.
Applications of BrAZh9-4 Alloy
Aerospace Components: Engine bushings, turbine bearings, and electrical contact elements.
Marine & Industrial Equipment: Propeller parts, pump shafts, and wear plates.
Automotive & Heavy Machinery: High-load bearings, sliding parts, and gears.
Mechanical properties under Т=20oС for grade BrАZH9-4 ( БрАЖ9-4 )
| Assortment | Dimension (mm) | σB (MPa) | σT (MPa) | δ5 (%) | Ψ (%) | KCU (kJ/m²) | Heat treatment |
|---|---|---|---|---|---|---|---|
| Bar, GOST 1628-78 | - | 540 | 15 | - | - | - | - |
| Soft | - | 400-500 | 35-45 | - | - | - | - |
| Hard | - | 500-700 | 4-6 | - | - | - | - |
Why Choose Russian Metals for BrAZh9-4 Supply
Direct Manufacturer Access: Competitive pricing to buy BrAZh9-4 copper alloy straight from trusted producers.
Certified Quality: GOST & UNS compliant with full material test reports.
Custom Shapes: Bars, billets, plates, and forged components.
Fast Global Delivery: Serving India and international aerospace supply chains.
Brinell Hardness for BrAZh9-4
| Brinell hardness for BrAZh9-4 ( 5pAX9-4 ), Bar GOST 1628-78 | HB 10⁻¹ = 110 - 180 MPa |
| Brinell hardness for BrAZh9-4 ( 5pAX9-4 ), Soft | HB 10⁻¹ = 100 - 120 MPa |
| Brinell hardness for BrAZh9-4 ( 5pAX9-4 ), Hard | HB 10⁻¹ = 160 - 200 MPa |
Friction coefficient Friction coefficient of the material BrАZH9-4 ( БрАЖ9-4 ) .
| Friction coefficient with oil : | 0.004 |
| Friction coefficient without oil : | 0.18 |
Technological properties Technological properties of the material BrАZH9-4 ( БрАЖ9-4 ) .
| Melting temperature | 1040 °C |
Physical properties for grade BrAZh9-4
| T | E 10⁵ (MPa) | α 10⁶ (1/Grade) | λ (Watt/(m·Grade)) | ρ (kg/m³) | C (J/(kg·Grade)) | R 10⁹ (Ohm·m) |
|---|---|---|---|---|---|---|
| 20 | 1.16 | - | 58 | 7500 | - | 120 |
| 100 | 1.16 | 16.2 | 58 | 7500 | 423 | 120 |
Equivalent steels for grade BrAZh9-4
Warning! Indicated both exact and nearest equivalents.
| USA | Czechia | Inter |
|---|---|---|
| - | CSN | ISO |
| C61900 | 423045 | CuAl8Fe3 |
Specification
Mechanical properties :
σB - Tensile strength [MPa]
σT - Yield stress [MPa]
δ5 - Specific elongation at fracture [%]
ψ - Reduction of area [%]
KCU - Impact strength [kJ/m²]
HB - Brinell hardness [MPa]
Physical properties :
T - Test temperature [Grade]
E - Young modulus [MPa]
α - Coefficient of linear expansion (20° - T) [1/Grade]
λ - Thermal (heat) condition coefficient [Watt/(m·Grade)]
ρ - Density [kg/m³]
C - Specific heat (range 20° - T) [J/(kg·Grade)]
R - Electrical resistance [Ohm·m]