ChinaAutoRegs\uff5cGB\/T 3398.2-2008 \u82f1\u6587\u7248\/English\/\u7ffb\u8bd1\/\u5851\u6599 \u786c\u5ea6\u6d4b\u5b9a \u7b2c2\u90e8\u5206\uff1a\u6d1b\u6c0f\u786c\u5ea6
\nPlastics – Determination of Hardness – Part 2: Rockwell Hardness<\/p>\n
\n1 SCOPE<\/p>\n
1.1 This part of GB\/T 3398 specifies a method for determining the indentation hardness of plastics by means of the Rockwell hardness tester using the Rockwell M, L and R hardness scales.
\n1.2 A Rockwell hardness number is directly related to the indentation hardness of a plastic material; the higher the Rockwell hardness number, the harder the material. Due to a short overlap of Rockwell hardness scales by this procedure, two different Rockwell hardness numbers of different scales may be obtained on the same material, both of which may be technically correct.
\n1.3 For materials having high creep and recovery, the time factors involved in application of the major and minor loads have a considerable effect on the results of the measurements.
\n1.4 An alternative method of using the apparatus to give hardness on the Rockwell-\uf061 hardness scale is specified in Annex A which shows how this scale may be related to the hardness measurement of GB\/T 3398.1.<\/p>\n
2 NORMATIVE REFERENCES<\/p>\n
The following standards contain provisions which through reference in this text, constitute provisions of this Standard. For dated references, subsequent amendments (corrigenda excluded) to, or revisions of, any of these publications do not apply. However, parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the Standards indicated below. For undated references, the latest edition of the applicable Standards referred to apply.
\nGB\/T 2411-2008 Plastics and ebonite – Determination of indentation hardness by means of a durometer (shore hardness) (ISO 868:2003, IDT)
\nGB\/T 2918-1998 Plastics – Standard atmospheres for conditioning and testing (ISO 291:1997, IDT)
\nGB\/T 3398.1-2008 Plastics – Determination of hardness – Part 1: Ball indentation method (ISO 2039-1:2001, IDT)
\nGB\/T 6031-1998 Rubber, vulcanized or thermoplastic-Determination of hardness (hardness between 10 IRHD and 100 IRHD) (ISO 48:1994, IDT)<\/p>\n
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\n\u4e13\u4e1a\u6e90\u4e8e\u4e13\u6ce8|ChinaAutoRegs \u59cb\u7ec8\u4e13\u6ce8\u4e8e\u673a\u52a8\u8f66\u6807\u51c6\u7ffb\u8bd1\uff01\u8fc4\u4eca\u4e3a\u6b62\u5df2\u7ffb\u8bd1\u4e0a\u5343\u4e2a\u56fd\u5185\u5916\u6c7d\u8f66\u6cd5\u89c4\u6807\u51c6\uff01\u72ec\u5bb6\u6253\u9020\u5343\u4e07\u7ea7\u6c7d\u8f66\u4e13\u4e1a\u672f\u8bed\u5e93\u548c\u8bb0\u5fc6\u5e93\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
ChinaAutoRegs\uff5cGB\/T 3398.2-2008 \u82f1\u6587\u7248\/Engli … \u7ee7\u7eed\u9605\u8bfb