羊眼拉爆螺丝 吊灯钩 秋千钩螺丝 带圈膨胀钩 M6 M8 M10 M12 M16

品牌	亿品/EPEAN	材质	304不锈钢
名称	304羊眼内拉爆螺丝	表面处理	未经过处理
标准	公制	包装说明	塑料袋/纸盒
尺寸	说明：参考规格由D*L组成，存在正负公差特别在意者甚拍。

	化学成分，%,max 组别 C Si Mn P S Cr Mo Ni Cu 特性 304-A2 0.1 1 2 0.05 0.03 15-20   8-19 4 加工硬化率适中，适于一般的冷间加工以及伸抽，冷加工性能较好，普遍用于外六角螺钉、螺母以及垫圈产品. 316-A4 0.08 1 2 0.045 0.03 16-18.5 2-3 10-15 1 加钼，耐腐蚀能力较304强，特别适用于海水及化学介质，更加的耐腐蚀性及耐孔蚀性。  注：  1)如镍含量低于8%,则锰的最小含量必须为5%        2)镍含量大于8%时，对铜的最小含量不予限制        3)如铬含量低于17%时，则镍的最小含量为12%        4)对于最大含碳量0.03%的奥氏体不锈钢，氮含量最高可达到0.22        5)对较大直径的产品，为达到规定的机械性能，在制造者说明书中，可能有较高的含碳量，          但对马氏体钢不应超过0.12%   机械性能 类别 组别 性能等级 螺丝直径 抗拉强度mpa/mm2 规定非比列伸长应为mpa/mm2 断后伸长量mpa/mm2 奥氏体 A2，A4 50 ≤ 39 500 210 0.6d 70 ≤ 24 700 450 0.4d 80 ≤ 24 800 600 0.3d

 

问题1 1.不锈钢为什么也会带磁性？ 304不锈钢属于奥氏体不锈钢，奥氏体在冷加工过程中有部分或少量转化为马氏体 ，马氏体是带磁性的，所以304不锈钢为无磁性或者微磁性。具体可以百度查询304不锈钢为什么含磁性。 问题2 2.如何识别正宗304不锈钢产品？ ①支持304不锈钢专用检测药水检测，如果不变色为正宗304不锈钢。 ②支持化学成分分析光谱分析。 ③支持烟雾测试，模拟实际使用环境。 问题3 3.最常用不锈钢有那几种？ ①.201不锈钢，适合在干燥环境中使用，遇水很容易水生锈。 ②304不锈钢，室外或潮湿环境，耐腐蚀耐酸性强。 ③316不锈钢，加钼，更加的耐腐蚀性及耐孔蚀性，特别适用于海水及化学介质。 2003年起，全世界不锈钢原料上涨，国内市场出现一类"低镍"的廉价经济型不锈钢（含镍Ni1.5-4.5%）的奥氏体不锈钢，价格比304不锈钢低约15%-40%，防腐蚀防锈能力相对较低，翰德威产品则全为奥氏体304或316不锈钢制品。

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		304	尼龙	铜	316	12.9	8.8	201	碳钢
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