Hot dip galvanizing is to make molten metal and iron matrix reaction and produce alloy layer, so as to combine the matrix and coating. Hot dip galvanizing is the first steel parts pickling, in order to remove iron oxide on the surface of steel parts, pickling, through ammonium chloride or zinc chlo

First of all, stainless steel screws have strong corrosion resistance, high temperature resistance, and good anti-rust performance. However, they are not completely immune to external environmental erosion, and they will still rust in some harsh environments.1. The surface of stainless steel has dus

A special type of nut used to weld nuts on thin plates with a spot welder. It is mainly used for sealing plate, panel and other structural parts of welding nut required by electronic panel cabinet of locomotive. Its advantages are high production efficiency, good performance, low energy consumption,

304 stainless steel is one of the most widely used chromium - nickel stainless steel, as a widely used steel, has good corrosion resistance, heat resistance, low temperature strength and mechanical properties; Stamping, bending and other thermal processing, no heat treatment hardening phenomenon (u

3.1 The full name of the certificate shall be "Fastener test Report F3.1", which is derived from ISO16228 "Types of Fastener Test Documents". The standard mainly provides the content required for fastener product test report, that is, the requirements for product test report, rather than the so-call

Reasons for bolt breakage:1.the quality of the bolts2.the strength of the bolt3.pretightening torque of bolts4.Fatigue strength of boltsUnqualified materials, unqualified heat treatment, unqualified product manufacturing, unreasonable bolt selection, harsh use environment, etc. all have a direct imp