Rod, wire, pipe made of CuAl9Mn2
Equivalent
| Grade | analogue | W. Nr. | Aisi Uns | En | Order |
|---|---|---|---|---|---|
| BrAMts9-2 | Buy from stock, view availability |
Properties of CuAl9Mn2
Grade: tinless, pressure-treated bronze with a high resistance during reversal of stress.
Industrial usage: wear-resistant components, screws, trucks, parts of hydraulic installation.
Percentage composition of CuAl9Mn2
| Element | Content |
| P | <0,01 |
| Cu | 86 — 90.5 |
| Zn | <1 |
| Pb | <0,03 |
| Sn | <0,1 |
| Si | <0,1 |
| Fe | <0,5 |
| Mn | 1.5 — 2.5 |
| Al | 8 — 10 |
Main properties
Alloy hardness: HB 10 -1 = 110 — 130 MPа
Point of melting = 1060°C
Coefficient of friction with lubricant = 0.006
Coefficient of friction without lubricant = 0.18
Mechanical characteristics of alloy CuAl9Mn2 at a temperature of 20°С
| Mill-products | δ5 (%) |
Size | KCU kJ/m2 |
ψ % | F.e. | sT (MPa) | σv(MPa) |
| Soft alloy | 20−40 | 400−500 | |||||
| Hard alloy | 4−5 | 600−800 |
Physical characteristics of alloy CuAl9Mn2
R 10 9(Ohm-m) |
C (J/(kg/degree)) | r (kg/m3) |
l (V/(m-Degree)) | a 10 -6 (1/Degree) |
E 10 -5 (MPa) |
T (Degree) |
| 110 | 7600 | 71,4 | 0,92 | 20 | ||
| 461 | 17 | 100 |
Special feature of bronze CuAl9Mn2 is a significant optimization of mechanical properties. By grinding grain, iron provides a delay of recrystallization. In order to improve strength properties, aluminium-iron bronze is aged at a temperature of 250−300 ° C for 2−3 hours after completion of thermohardening at temperature of 950 ° C. It is used in a manufacture of valve seats, bushings, worms, gears, screw boxes in mechanical engineering. Nickel provides increasing of mechanical properties, heat resistance, corrosion resistance, recrystallization temperature. It also increases antifriction properties, resistance to low temperatures. Aluminium-iron bronzes are used for pin bushes, gears, valves, essential parts in aircraft industry, etc. Manganese provides increasing of corrosion and technological properties. Aluminium-iron bronzes can be perfectly pressure-treated in cold condition. They are used in a manufacture of worm screws, bushings, gears, which are operated at a temperature of up to 250 ° C in marine shipbuilding.
| Description | Identification | Description | Identification |
| — differential deposit at a process of the first crack appearing, % | å | — ultimate tensile strength (rupture strength), MPa | σv |
| — maximum shear stress, ultimate torsional strength, MPa | Jê | — elastic strength, MPa | σ0,05 |
| — ultimate bending strength, MPa | σpr | — conventional yield limit, MPa | σ0,2 |
| — fatigue endurance limit during bending test with symmetrical load cycle, MPa | σ-1 | — percentage elongation after rupture, % | δ5,δ4,δ10 |
| — fatigue endurance limit during torsion test with symmetrical load cycle, MPa | J-1 | — yield point (contraction), MPa | σ0,05 |
| — amount of load cycling | n | — relative shear, % | v |
| — specific electrical resistance, Ohmm | R and ρ | — short ultimate tensile strength, MPa | sv |
| — standard module of elasticity HPa | E | — contraction ratio, % | ψ |
| — properties getting temperature, Degree | T | — impact hardness, which is established on specimens with concentrators in accordance with V and U types, J/cm2 | KCU and KCV |
| — heating capacity of alloy (heat conduction coefficient), V/(m°С) | l | — permanent change of form — yield point (proportionality), MPa | sT |
| — specific heat of alloy (temperature range is 20°С), [J/(kg-deg)] | C | — Brinell hardness | HB |
| — density, kg/m3 | pn and r | — Vicker’s hardness | HV |
| — linear thermal expansion coefficient (in a temperature range of 20°С), 1/°С | a | — Rockwell hardness C | HRC |
| — long-time strength limit, MPa | σtТ | — Rockwell hardness B | HRB |
| — module of elasticity at a process of torsional shear, HPa | G | — Shore hardness | HSD |
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