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M1.7 M2 M2.3 M2.6 M3 M4 Stainless Steel 304 Round Head Self-tapping Screws with Washers

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双圣五金旗舰店

最少5个字符
PWA
对公差特别在意者慎拍,实物为准单位:mm
螺纹规格M1.4M1.7M2M2.3M2.6M3M4
螺纹直径d1.41.722.32.634
头部直径dk 3.563.83.994.055.086.67
垫圈直径dc455.06.06 .56.958.51
头部厚度k 1.031.301.411.792.533.17

 

 

 

最少5个字符

化学成分,%,max
组别CSiMnPSCrMoNiCu特性
304-A20.1120.050.0315-20 8-194

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-A40.08120.0450.0316-18.52-310-151

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%,则锰的含量必须为5%
2)镍含量大于8%时,对铜的含量不予限制
3)如铬含量低于17%时,则镍的含量为12%
4)对于含碳量0.03%的奥氏体不锈钢,氮含量可达到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,A450

≤ 39

5002100.6d
70

≤ 24

7004500.4d
80

≤ 24

8006000.3d

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。304药水小标-1
②支持化学成分分析光谱分析。激光药水小标-1
③支持烟雾测试,模拟实际使用环境。

问题3

3.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。

Parameter information
Brand DOUBLE SHENG
Color Options M1.7*4(50 pcs) M1.7*5(50 pcs) M1.7*6(50 pcs) M1.7*8(50 pcs) M1.7*10(50 pcs) M2*4(50 pcs) M2*5(50 pcs) M2*6(50 pcs) M2*8(50 pcs) M2*10(50 pcs) M2.3*5(50 pcs) M2.3*6(50 pcs) M2.3*8(50 pcs) M2.3*10(50 pcs) M2.3*12(50 pcs) M2.6*6(50 pcs) M2.6*8(50 pcs) M2.6*10(50 pcs) M2.6*12(50 pcs) M3*6(50 pcs) M3*8(50 pcs) M3*10(50 pcs) M3*12(50 pcs) M3*14(50 pcs) M3*16(50 pcs) M3*20(50 pcs) M4*8(50 pcs) M4*10(50 pcs) M4*12(50 pcs) M4*16(50 pcs) M4*20(50 pcs) M4*25(50 pcs) M4*30(50 pcs)
Model 304 Stainless Steel Self-tapping Screws with Washer
Material 304 Stainless Steel
Standard Type National Standard
Head Type Round Pan Cross Head with Washer
Category Self-tapping Screws
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