Steel shot testing items

　　Fatigue life testing, particle size testing, hardness testing, third-party testing, content analysis, oil content testing, chemical element testing, harmful substance testing, hollowness testing, explosion-proof testing, torsion testing, accumulation specific gravity testing, Rockwell hardness, Brinell hardness , Vickers hardness, microhardness, Knuds hardness, Leeb hardness and nano-hardness, etc.

　　Detection range of steel shot:

　　1. Steel shot on cast iron parts, steel castings and non-ferrous metal accessories.

　　2. Steel shot on ordinary steel weldments, castings and steel accessories.

　　Metal steel shot, steel sand shot, stainless steel shot, sandblasting steel shot, low shell steel shot, etc.

　　Steel shot testing standards:

　　GB/T 18838.3-2008 Surface treatment of steel before application of paint - Technical requirements for metal abrasives for blast cleaning - Part 3: High carbon cast steel shot and sand

　　GB/T 18838.4-2008 Surface treatment of steel before application of paint - Technical requirements for metal abrasives for blast cleaning - Part 4: Low carbon cast steel shot

　　JB/T 8354.2-2015 Metal abrasives for shot blasting and strengthening Part 2: High carbon cast steel shot

　　JB/T 8354.4-2015 Metal abrasives for shot blasting and strengthening Part 4: Low carbon cast steel shot

　　JB/T 8354.5-2015 Metal abrasives for shot blasting and strengthening Part 5: Stainless steel shot

　　YB/T 5149-1993 Cast steel shot

　　Steel shot hardness testing method:

　　1. This is to use a hardened steel shot of a certain diameter, under a certain load (p), to press into the surface of the specimen, stay there for a period of time, then remove the load, and measure the area of the indentation. The smaller the indentation, the smaller the indentation indicates resistance to plasticity. The deformation ability is the greater the hardness. The greater the hardness, the smaller the hardness. It is represented by "HB".

　　2. Under the specified external load, press the steel shot or diamond indenter vertically into the surface of the specimen to produce an indentation, test the indentation depth, and then use the Rockwell hardness calculation formula HR=(K-H)/C The Rockwell hardness can be calculated. Simply put, the shallower the indentation, the greater the HR value, and the higher the hardness of the material; it is represented by "HRC"; it represents the pressure of the specimen when a diamond cone indenter with a vertex angle of 120 degrees is used under a test load of 150kg. The depth of the mark is 0.08mm.

　　Steel shot hardness testing standards:

　　1. Usually the standards implemented for steel shot are: SAE, VDFI8001, AMS2431.

　　2. The hardness range of steel shot: HRC40-50 HRC42-50 HRC56-60 HRC 63-66 (the maximum deviation range is ±3.0HR).

　　3. Density of steel shot: minimum density 7.4g/m³ (can be measured by alcohol replacement method).