MOLD–MOR™

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Cadi MOLD MOR Physical and Mechanical Properties Return to Products & Services

MOLD–MOR™ Physical and Mechanical Property Comparison

Table I Mold Alloy Thermal Conductivity (Btu/Hr/Ft2/°F) MOLD-MOR 1 135 MOLD-MOR 2 135 MOLD-MOR 3 75 MOLD-MOR 4 60 P-20 17 H-13 15 420 SS 13 ALUM QC7 93 Mold materials with high thermal conductivity provide maximum cooling benefits and faster molding cycles. Also, the higher the thermal conductivity numbers the faster the mold surface temperature will reach equilibrium, important for reducing stresses in the molded part. See table I for properties. Table II Mold Alloy Tensile Strength (ksi) MOLD-MOR 1 100 MOLD-MOR 2 115 MOLD-MOR 3 170 MOLD-MOR 4 185 P-20 140 H-13 210 420 SS 255 ALUM QC7 80 Tensile strength is extremely important in mold material selection. The Cadi copper alloys offer an exceptional combination of thermal conductivity and tensile strength. Tensile strengths are listed in Table II. Table III Mold Alloy Hardness MOLD-MOR 1 95 Rb MOLD-MOR 2 98 Rb MOLD-MOR 3 30 Rc MOLD-MOR 4 40 Rc P-20 30 Rc H-13 45 Rc 420 SS 50 Rc ALUM QC7 91 Rb Cadi copper alloys have adequate hardness levels for applications when applied properly in mold designs. Toughness of a mold alloy is a combination of properties and not hardness alone. Hardness levels are listed in both the Rockwell B and C scale. See hardness comparisons listed in Table III. Table IV Mold Alloy Elongation (%) MOLD-MOR 1 14 MOLD-MOR 2 14 MOLD-MOR 3 15 MOLD-MOR 4 7 P-20 20 H-13 15 420 SS 10 ALUM QC7 7 A good combination of physical properties is important in selecting the proper mold alloy. An extremely hard material, with a low elongation value may crack or break easily. The combination of high ductility and excellent tensile strength make the Cadi copper alloys the ideal material choice for long core pins. Elongation values are listed in Table IV. Table V Mold Alloy Compressive Yield (ksi) MOLD-MOR 1 80 MOLD-MOR 2 90 MOLD-MOR 3 140 MOLD-MOR 4 155 P-20 110 H-13 185 420 SS 215 ALUM QC7 75 Another property important in the selection of the proper mold material is compressive yield strength. These values are given in Table V. Table VI Mold Alloy Coefficient of Thermal Expansion (10-6/F) MOLD-MOR 1 9.7 MOLD-MOR 2 9.8 MOLD-MOR 3 9.7 MOLD-MOR 4 9.7 P-20 7.1 H-13 7.1 420 SS 6.1 ALUM QC7 12.8 Copper alloys have a higher coefficient of thermal expansion than traditional steel mold alloys. On molds or components with long dimension, the rate of thermal expansion must be calculated to ensure proper fit, interference or clearance. Thermal expansion data is listed in Table VI.

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