BULLET RESISTANT GLASS LEVELS

from web site

The European standard EN 1063 regulates the testing procedure for bullet-resistant glass in 9 different ballistic classes. The lowest ballistic class is BR1, the highest BR7. The classes SG1 and SG2 represent hunting shotguns.

The 4 lower ballistic classes (BR1 to BR4) represent weapons ranging from sporting rifles to pistols or revolvers. The ballistic classes above represents long weapons, such as the American M16 rifle or the NATO G36 and G3 rifles. These are weapons that are effective and precise at long distance.

The following table shows the weapons and ammunition types used for testing of bullet-resistant glass in accordance with EN 1063. Incidentally: the fastest projectile speed is 950 m/s. That's at least 3,400 km/h.

Resis tance class	Type	Calibre	Bullet			Test condition
Resis tance class	Type	Calibre	Type	Mass [g] +/-1	Energy [Joule]	Shot distance [m] +/-0.5	Impact speed [m/s] +/-10
BR1	Gun	.22 LR	L/RN	2.6	168	10	360
BR2	Handgun	9 mm Luger	FJ¹⁾/RN/SC	8.0	640	5	400
BR3	Handgun	.357 Magnum	FJ¹⁾/CB/SC	10.2	943	5	430
BR4	Handgun	.44 Rem. Magnum	FJ²)/FN/SC	15.6	1,510	5	440
BR5	Gun	5.56 x 45³⁾	FJ²⁾/PB/SCP1	4.0	1,805	10	950
BR6	Gun	7.62 x 51	FJ¹⁾/PB/SC	9.5	3,272	10	830
BR7	Gun	7.62 x 51⁴⁾	FJ²⁾/PB/HC1	9.8	3,295	10	820
SG1*	Shotgun	Shotgun 12/70	Lead shotgun shot⁵⁾	31	2,734	10	420
SG2**	Shotgun	Shotgun 12/70	Lead shotgun shot⁵⁾	31	2,734	10	420
* one shot, +/- 0.5 g, +/- 20 m/s ** three shots, +/- 0.5 g, +/- 20 m/s 1) Steel full metal jacket shot, plated 2) Tombac full metal jacket shot 3) Spin length 178 mm +/- 10 mm 4) Spin length 254 mm +/- 10 mm 5) Brenneke			L Lead CB Conical bullet shot FJ Full metal jacket shot FN Flat-nosed bullet HC1 Steel hard core, mass 3.7 g +/-0.1 g, Hardness larger than 63 HCR			PB Pointed bullet RN Round-nose bullet SC Soft-centre (lead) SCP1 Soft-centre (lead) with steel penetrator (type SS109)
Ballistic classes for bullet resistant Glass in accordance with EN 1063

Firing tests:
In the firing tests in accordance with EN 1063, the bullet-resistant glass (500 x 500 mm) to be tested is fastened in a frame.

The panes receive 3 hits in the centre, each hit forming an equilateral triangle at a distance of 12 cm. The angle of impact is 90° and the firing distance is 5m or 10m, depending on the resistance class.

The shot may not penetrate the bullet-resistant glass.

If no glass splinters emerge on the protective side, the ballistic class additionally receives the rating "no splinters" (NS= no splinters). If glass splinters emerge on the protected side of the impact-resistant glass, "Splinters" is added to the test result.

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on Aug 29, 20