AMPCO® 18 Sand castings

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Description

The exceptional wear and fatigue resistance of this alloy results from a controlled duplex alpha and beta phase. This alloy has high strength combined with good ductility and unusual toughness. The physical characteristics of this alloy can be varied by heat treatments (AMPCO® 18.22, 18.23 and 18.136).

Ashby charts

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Properties

General

Density

ρ

7.45 g/cm³ at 23 °C

Mechanical

Charpy impact energy

aK,charpy

13.5 J at 23 °C

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Compressive strength

Rmc

938 MPa at 23 °C

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Elastic modulus

E

110 GPa at 23 °C

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Elongation A5

A5

14 % at 23 °C

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Fatigue strength

SNf

221 MPa at 23 °C

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100.000.000 cycles

Hardness, HBW

HBW

179 [-] at 23 °C

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HBW 10/3000

Hardness, Rockwell B

HRB

89 [-] at 23 °C

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Izod impact energy

aK,izod

20.3 J at 23 °C

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Proportional limit in compression

Rpc

207 MPa at 23 °C

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Reduction of area

Z

12 % at 23 °C

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Shear strength

τ

400 MPa at 23 °C

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Tensile strength

Rm

620 MPa at 23 °C

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Yield strength Rp0.5

Rp0.5

269 MPa at 23 °C

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Thermal

Coefficient of thermal expansion

α

1.62E-5 1/K at 23 °C

Specific heat capacity

cp

420 J/(kg·K) at 23 °C

Thermal conductivity

λ

63 W/(m·K) at 23 °C

Electrical

Electrical conductivity

σel

8.00E+6 S/m at 23 °C

Specific Electrical conductivity

14 % IACS

Chemical properties

Element

Weight %

Comment

Cu

-

Balance

Al

10.5 %

Fe

3.5 %

Other

0.5 %

Technological properties

Application areas

This alloy is well suited for use as gears, worm wheels, bushings and bearings. The machine tool industry has adopted AMPCO® 18 as standard for all applications requiring good sliding properties, wear resistance, fatigue resistance, toughness and/or resistance to deformation under load. AMPCO® 18 is used in steel mill service as screw down nuts, slippers (many of which are "cast to size"), gears, wedges and breaker blocks. AMPCO® 18 has an excellent corrosion resistance and is used in pickling service for such parts as hooks, crates and spreaders, etc.

This material data has been provided by AMPCO METAL.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.