CHARACTERISTICS
Carrs RoyAlloy is a 400 Series martenistic stainless steel supplied in the
prehardened condition. Carrs RoyAlloy is characterised as having:
| • |
Excellent machinability |
| • |
Good corrosion resistance |
| • |
Uniform and consistent hardness in all dimensions |
| • |
Good resistance to indentation (compressive strength) |
| • |
Excellent ductility |
| • |
Excellent flatness |
| • |
High dimensional stability |
| • |
Excellent weldability |
| • |
Good themal conductivity |
TYPICAL APPLICATIONS
| • |
Plastic mould bases |
| • |
Plastic and rubber moulds with low polishability requirements |
| • |
Constructional parts |
| • |
Plastic extrusion |
|
PROPERTIES
Physical Data
Prehardened to 321 HB. Data for ambient and elevated
temperatures.
Temperature |
20°C |
200°C |
Density g/cm3 |
7.80 |
7.75 |
Modulus of elasticity Mpa |
200,000 |
190,000 |
Coefficeient of thermal expansion
Per °C from 20°C |
- |
10,0 x 10-6 |
Tensile Strength
Longitudinal tests from 76mm rolled plate at 321 HB |
Ulitimate tensile stess MPa |
1,069 |
1,048 |
Yield Stress MPa |
890 |
869 |
% Elongation |
12 |
12 |
% Reduction in area |
34 |
34 |
Impact Strength
Longitudinal Charpy V-notch tests from a 76mm folled plate at 321 HB |
Impact Stength Joules |
22 |
36 |
WELDING
For best results use special RoyAlloy welding electrodes. This will eliminate the risk of
galvanic corrosion arising from the use of dissimilar materials and avoid the development
of a heat affected zone with its associated risk of cracking.
HEAT TREATMENT
RoyAlloy is supplied in the prehardened condition at ~321 HB. RoyAlloy can be supplied at
higher or lower hardness values by request when it will still retain its free machining
characteristics. |
