Seamless carbon steel pipe hardness test method

Inner diameter of seamless steel pipe is more than 6.0mm and wall thickness is less than 13mm annealed seamless steel pipe material, which can be used W-B75 Webster Hardness test with very fast, easy, suitable for rapid non-destructive of the seamless steel pipe material qualified inspection. Inner diameter of seamless steel pipe is greater than 30mm and wall thickness greater than 1.2mm seamless steel tubes, using a Rockwell hardness test HRB, HRC hardness.

无缝钢管的内径大于30mm，壁厚小于1.2mm的无缝钢管，罗克韦尔浅表硬度测试硬度或HRN。直径小于0mm，无缝钢管的48毫米以上，管道专用罗克韦尔硬度测试HR15T硬度。当无缝钢管内径大于26mm时，您还可以使用罗克韦尔或罗克韦尔浅表硬度试验硬度的管壁。

拉伸试验采用由样品制成的碳钢管，拉伸试验机中的样品将拉到裂缝，然后测定一个或多个机械性能，通常只测定拉伸强度，屈服强度，伸长率伸长率，伸长率，伸长率百分比伸长率和截面收缩。拉伸试验金属材料的机械性能，基本试验方法，几乎​​所有金属材料，只要提供拉伸试验所需的机械性能。特别是那些塑造的那些不易材料硬度测试，拉伸试验只成为机械性能测试的手段。硬度试验是硬质压痕规定条件缓慢压入样品的表面，然后测试压痕深度或尺寸，以便确定材料硬度的尺寸。硬度测试是机械性能测试，最简单，最快，最容易实现。硬度测试是非破坏性的，硬度与拉伸强度值之间的近似转换关系。材料的硬度值可以转化为拉伸强度值，它具有很大的实际意义。

Tensile test is not easy to test the strength is very convenient, so people are increasingly test hardness and less test its strength, and hardness conversion. Hardness manufacturing technology continues to progress and innovation, the original can not directly test the hardness of materials, such as seamless steel pipe, stainless steel plate and stainless steel bands, now may directly test the hardness of the Therefore, there is a hardness test is gradually replaced by the trend of the tensile test. The hardness test of the stainless steel to take into account its mechanical properties, performance and quality of this is related to the deformation of stainless steel as raw materials, stamping, cutting and other processing. Therefore, all seamless steel tubes for mechanical properties testing. Mechanical properties of the test method is mainly divided into two categories, a tensile test, hardness test.

其中大部分是不锈钢国家标准也提供了拉伸试验和硬度测试。对于那些不容易进行材料的硬度测试，例如无缝钢管只需要拉伸试验。不锈钢标准，一般规定布，罗，维多利亚三硬度试验方法，测定Hb，HRB（HRC）和HV硬度值，仅为三个硬度值的规定可以。特别是新开发的便携式岩石硬度测试仪，管道罗克韦尔硬度测试仪可以像0.05mm不锈钢板，不锈钢带薄到4.8mm的无缝钢管，用于快速，精确的硬度测试，使得难以解决国内问题解决。