MSRR 8503
A complex nickel- aluminium bronze with good mechanical strength and hardness which are maintained at elevated temperatures. For nonclassified parts only – machining bars, forging stock and forgings general bars and forgings.
National Specification
Material may also be released to Customer Specifications, subject to enquiry.
| ASTM | UNS | SEA AMS | British Standard | Other |
|---|---|---|---|---|
| - | - | - | - | - |
Technical Data
Chemical Composition
| Cu | Al | Ni | Fe | |
|---|---|---|---|---|
| Min % | - | 8.0 | 4.0 | 4.0 |
| Max % | Bal | 11.0 | 6.0 | 6.0 |
Typical Tensile Properties at Ambient Temperature.
| Annealed Size | 0.2% PS MPa min. | UTS MPa min. | Elongation % min. |
|---|---|---|---|
| Bars/Finished Parts < 100mm | 410 | 695 | 15 |
| Bars/Finished Parts > 100mm | 325 | 650 | 15 |
| Forging Stock < 100mm Forging | 410 | 695 | 15 |
| Stock > 100mm Forgings/Finished | 325 | 650 | 15 |
| Parts < 100mm Forgings/Finished | 410 | 695 | 15 |
| Parts > 100mm | 325 | 650 | 15 |
Physical Properties.
| Density | 7500 kg/m3 |
| Electrical Conductivity | 8% IACS |
| Electrical Resistivity | 0.172µΩm |
| Thermal Conductivity at 20°C | 42 W/(mk) |
| Thermal Expansion 20 - 300°C | 17.6 X 10-6 / °K |
Hot Working Machining
Nickel Aluminium Bronze is hot worked by conventional techniques in the temperature range 815 900°C.
Heat Treatment
Annealed at 450°C or 700°C for a time dependent on section thickness
followed by air cooling.
Machining
Machining is best performed using a carbide tool with water soluble
lubricant, a light feed, a moderately heavy depth of cut and the highest
possible cutting speed consistent with best tool life. Typical parameters
are tabulated below.
| Condition | Tool Type | Cut Depth | Speed m/min. | Feed mm/rev. |
|---|---|---|---|---|
| Annealed | Carbide | 3.0 – 6.0 roughing | 30 – 60 | 0.25 |
| 0.12 – 0.25 finishing | 120 – 180 | 0.12 |
The data presented herein are not intended for specification purposes, and should be considered as typical or average values only. Applications suggested for the materials described herein are made solely to allow the reader to make his own evaluation, and are not to be construed as warranties, either limited or express, or fitness for these or other applications. Materials must be tested under actual service conditions to determine their suitability for a particular purpose.