IK Impact Resistance of Glass | Steel-Ball Drop Test
When talk about tempered cover glass , we often mention IK rating to judge the effect of tempering, so what does this IK rating mean?
The IK test (impact resistance test) of glass is evaluated by dropping a steel ball naturally and hitting the glass cover. The test will be repeated 3 times to test the impact resistance of the glass.) According to different shocking energy,the shocking/impact resistance of glass is different, ranging from IK00-IK10.( the higher the number, the higher the impact resistance of the glass )
The impact energy ( J ) depends on two factors:
●The drop height
●The weight of the steel ball.
Next, let's take a look at the impact tests represented by different IK ratings.
| IK00 | No any protection |
| IK01 | 0.25kg steel ball falls from 56 mm height |
| IK02 | 0.25kg steel ball falls from 80 mm height |
| IK03 | 0.25kg steel ball falls from 140 mm height |
| IK04 | 0.25kg steel ball falls from 200 mm height |
| IK05 | 0.25kg steel ball falls from 280 mm height |
| IK06 | 0.25kg steel ball falls from 400 mm height |
| IK07 | 0.50kg steel ball falls from 400 mm height |
| IK08 | 1.70kg steel ball falls from 300 mm height |
| IK09 | 5.00kg steel ball falls from 200 mm height |
| IK10 | 5.00kg steel ball falls from 400 mm height |
In 1995, the IK Rating became a specific rating for the impact resistance of a product. Today it is associated with the European standard IEC EN 62-262. The IK rating does not assess the service life, but the ability of the glass to resist impact in the face of the external environment. It is decisive for us today to assess the impact resistance of glass.
So, after glass doing tempering, glass will be 5-8 times more shock-resistance than before, we can use IK to judge the shock resistance. If you don’t know what is temper glass , you can read our previous article: How many Types of Temper Glass ?
Tibbo Glass is a professional tempered/toughened glass manufacture, customising different grades of toughened glass from IK06-10 for you.