Technical Standard:

TEST ITEMS

STANDARD

RESULTS

GB/T4100-2006

European standard

Water absorption

<0.5%

<0.5%

<0.3%

Breaking strength
Rupture modulus

>1300N
>35MPa

>27MPa

>1500N
>38MPa

Length

1.0mm

0.6%

0.2mm

Width

1.0mm

0.6%

0.2mm

Thickness

1.0mm

5%

3%

Surface smoothness

0.2%

0.5%

0.2%

Edge straightness

0.2%

0.5%

0.2%

Squareness

0.2%

0.6%

0.2%

Thermal vibratility

No crackle and crack after rapid cooling and rapid heating cycle for 10 times

Approve

No crackle and crack after rapid cooling and rapid heating cycle for 10 times

Frost resisting property

No crack or spilling after frost resistance test

EN176

Past

Radioactivity

iRa<1Ir<1.3

iRa<0.4Ir<0.8