1, surface hardness
Surface hardness is an important aspect to distinguish the quality of the 42Crmo4 chrome bar. Because the surface hardness of the product is not up to standard, it will directly shorten the service life of the product. So if you want to choose a good chrome bar, you must check its surface hardness.
2, surface roughness
The surface roughness of the chrome bar is not good, which will not only affect the service life of the product. In serious cases, it will also affect the plating quality, causing premature flaking or rusting of the plating layer. The chrome bar manufacturer will cause the product to lose its surface. Protective effect. Therefore, the surface roughness is also an aspect of distinguishing the chrome bar. In general, the proper range of the surface roughness of the chrome bar should be between Ra 0.2 and 0.4.
3, surface corrosion test
Because the chrome bar has only high corrosion resistance, it can be used in places where oxidation is easy (such as water, chemicals, steam, sea water, etc.) to ensure its high performance. Therefore, generally good chrome bar need to pass the surface corrosion test, and the test generally reaches the salt spray test for 72 hours to reach level 9.
Datong Hydraulic specialize in hard chrome bar ,hollow chrome bar with 20 years history, Besides chrome plated rods, Datong also produce and supply induction hardened chrome plated cylinder rods.honed tube,hydraulic cylinder barrel ,want to know about our products ,Please contact us through below methods.
Email: andy@datong-hydraulic.com
TEL: +86-13681801718