How to judge the 10.9 grade wheel studs
To judge mechanical property of wheel studs, we should from 3 parts that is hardness, tensile, and torque. These 3 items are indispensable. And the parameter of 10.9 grade wheel studs should have these parts: Rockwell hardness is HRC32-39, tension load≥73100N/㎜², tensile strength≥1040N/㎜².
Some factories say that their wheel studs are 10.9 grade just according to hardness test. It’s not rigorous and scientific. If they use wrong material and the hardness is too high, the products will be fragile and easy to break down. Wheel studs bear the weight of whole car, which is the safety part of car. The quality is very important.
“HONISHEN” wheel studs firstly choose good material. Then we will test hardness, tensile, and torque regularly everyday, and send samples to third-party test center to finish anti-fatigue testing to ensure every parameter is qualified then send to customs.