Injection Molding: Hardness of Mold Material

 

To create perfect molds, it is important to select suitable material, molds are constructed by materials which are impact resistance, abrasion resistance, with high strength and nice mechanical behavior, and they are not easy to crack or out of shape.

Depends on mold structure, injection molding process, and requirement of finished plastic article, we should select different material with different hardness. 

Below please see conversion table of mold material hardness, for mobile phone user, please swipe to the right to view the whole information:

 

Vickers
Hardness(HV)
Brinell Hardness(HB)
10m/m 3000kg
Rockwell Hardness (HR)Shore
Hardness
(HS)
Tensile Strength
(kg/mm2)
Grade AGrade BGrade C
940-85.6-68.097-
920-85.3-67.596-
900-85.0-67.095-
880-84.7-66.493-
860-84.4-65.992-
840-84.1-65.391-
820-83.8-64.790-
800-83.4-64.088-
780-83.0-63.387-
760-82.6-62.586-
740-82.2-61.884-
720-81.8-61.083-
700-81.3-60.181-
690-81.1-59.7--
680-80.8-59.280231
670-80.6-58.8-228
660-80.3-58.379224
650-80.0-57.8-221
640-79.8-57.377217
630-79.5-56.8-214
620-79.2-56.375210
610-78.9-55.7-207
600-78.6-55.274203
590-78.4-54.7-200
580-78.0-54.172196
570-77.8-53.6-193
560-77.4-53.071189
55050577.0-52.3-186
54049676.7-51.769183
53048876.4-51.1-179
52048076.1-50.567176
51047375.7-49.8-173
50046575.3-49.166169
49045674.9-48.4-165
48044874.5-47.764162
47044174.1-46.9-157
46043373.6-46.162155
45042573.3-45.3-150
44041572.8-44.559148
43040572.3-43.6-143
42039771.8-42.757141
41038871.4-41.8-137
40037970.8-40.855134
39036970.3-39.8-130
38036069.8-38.852127
37035069.2(110.0)37.7-123
36034168.7(109.0)36.650120
35033168.1-35.5-117
34032267.6(108.0)34.447113
33031367.0-33.3-110
32030366.4(107.0)32.245106
31029465.8-31.0-103
30028465.2(105.5)29.84299
29528064.8-29.2-98
29027564.5(104.5)28.54196
28527064.2-27.8-94
28026563.8(103.5)27.14092
27526163.5-26.4-91
27025663.1(102.0)25.63889
26525262.7-24.8-87
26024762.4(101.0)24.03785
25524362.0-23.1-84
25023861.699.522.23682
24523361.2-21.3-80
24022860.798.120.33478
230219-96.7(18.0)3375
220209-95.0(15.7)3271
210200-93.4(13.4)3068
200190-91.5(11.0)2965
190181-89.5(8.5)2862
180171-87.1(6.0)2659
170162-85.0(3.0)2556
160152-81.7(0.0)2453
150143-78.7-2250
140133-75.0-2146
130124-71.2-2044
120114-66.7--40
110105-62.3---
10095-56.2---
9590-52.0---
9085-48.0---
8581-41.0---

 

Remarks: 1. Sources from JIS Hardness Conversion Table    2. The values stated in parentheses are for information only, which are beyond normal range of use.

 

**Ji-Horng Plastic is a leading plastic injection molding manufacturer since 1986, for more information, please contact us!**

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