首先要看的是铁或不锈钢的组合。铁的组合螺丝也就是我们常说的碳钢组合螺丝。碳钢组合螺丝一般采用1006、1010A、1018、10B21等螺丝生产。4.8级组合螺钉一般采用1006、1010A螺丝生产。1006螺杆丝与1010A相比较。1010A螺丝线材的质量要好得多。1006丝制组合螺丝的硬度比1010A丝制组合螺丝的硬度要高。但是，用1006丝制作的螺丝会变得更硬，而且硬度都是原来的。1010A螺丝丝制作的螺丝可以进行硬化处理。经过硬化后，一般比未硬化时要硬。 But in fact, we do 8.8-level combination screws, we generally use 1018 or better screw wire 10B21. After producing the natural color combination screw, it needs to be hardened in the heat treatment plant. After the hardening is completed, it is necessary to remove hydrogen in the electroplating factory first. In addition to hydrogen in the deplating, this first dehydrogenation is to prevent the screw from hydrogen embrittlement and prevent the spring pad in the combination stainless steel screw from breaking.
