N/A。
铝制行业使用四位数索引系统来指定其锻炼铝合金。 如下所述,第一个数字根据主要合金元素表示合金组。
1xxx系列
在这组中,最低铝含量为99%,没有主要合金元素。第二个数字表示杂质限制的修改。如果第二位数为零,则没有对单个杂质的特殊控制。数字1至9,根据需要连续分配,表明对一种或多种杂质的特殊控制。最后两个数字表示特定的最小铝含量。尽管该组中的绝对最小铝含量为99%,但某些等级的最小值高于99%,而最后两个数字的最低含量为99%的百分之一的百分之一的百分之一。因此,1030表示最小铝的最低含量为99.30%。没有对个人杂质的特殊控制。名称1130、1230、1330等。表明对一种或多种杂质进行特殊控制的纯度。同样,1100表示最低铝含量为99.00%,并具有个人杂质控制。
2xxx through 9xxx Series
主要的合金元素由第一个数字表示,如下:
2xxx铜 3xxx锰 4xxx硅 5xxx镁 6xxx镁和硅 7xxx锌 8xxx其他元素 9xxx未使用的系列
The second digit indicates alloy modification. If the second digit is zero. it indicates the original alloy: digits 1 through 9, which are assigned consecutively, indicate alloy modifications. The last two digits have no special significance, serving only to identify the different alloys in the group.
Experimental Alloys
Experimental alloys are designated according to the four digit system, but they are prefixed by the letter X. The prefix is dropped when the alloy becomes standard. During development, and before they are designated as experimental, new alloys are identified by serial numbers assigned by their originators. Use of the serial number is discontinued when the X number is assigned. |