Explosives for special purposes, boosters
The SEMTEX® family of industrial explosives are designed to be used for boostering, secondary blasting, destructions and special blasting works.
The plastic explosives SEMTEX® are marked for detection according to the requirements of Montreal Convention ( ICAO ).
SEMTEX® 1A, SEMTEX® 10
The above-mentioned explosives are based on crystalline PETN and non-explosive plasticizer. SEMTEX® 1A and SEMTEX® 10 are designed to be used for destruction of concrete, metal constructions or underwater blasting operations.
They also may be used for construction of special cumulative and oriented charges.
Transportation classification: UN 0084, Explosive, Blasting, Type D , 1. 1 D, ADR
SEMTEX® 1H
The plastic explosive SEMTEX® 1H is based on crystalline RDX or mixture of RDX / PETN and none explosive plasticizer. The technical specification permits variations in the RDX / PETN ratio in a wide range.
Transportation classification: UN 0084, Explosive, Blasting, Type D , 1. 1 D, ADR
Parameter |
Unit |
SEMTEX® 1A |
SEMTEX® 1H |
SEMTEX® 10 |
| Type | plastic |
plastic |
plastic |
Colour | red |
yellow |
black |
| Explosion heat | kJ/kg |
4,980 |
4,982 |
5,030 |
| Swath volume | dm3/kg |
950 |
950 |
790 |
| Oxygen balance | %O2 |
-66.0 |
-61.7 |
-45 |
| Detonation velocity | m/s |
7,200 |
7,400 |
7,300 |
| Trauzl test | ml |
330 |
330 |
330 |
| Brisance by Hess | mm |
21 |
22 |
22 |
| RWS (blasting gelatine) | % |
80 |
85 |
80 |
| Temperature of explosion | °C |
3,800 |
3,800 |
3,800 |
| Transmission of detonation | cm |
3 |
5 |
5 |
| Density | kg/m3 |
1,420 |
1,430 |
1,470 |
| Initiation sensitivity | - |
cap No. 8 |
cap No. 8 |
cap No. 8 |
| Water resistance | - |
excellent |
excellent |
excellent |
| Smallest permitted diameter | mm |
3 |
5 |
3.5 |
Standard packaging
All explosives are packed in outer UN approved cardboard boxes.
| SEMTEX® 1 A | |
| - bricks ( 1000 , 2500 , 3000 g ) wrapped in a paraffin coated paper or polyethylene | |
| - rods 21 mm in diameter / 300 g | |
| - boosters - diameter 50 or 60 mm (weight 250, 500, 1000) | |
| SEMTEX® 1H | |
| - bricks 2500 g | |
SEMTEX® C-4 a PW 4
Parameter |
Unit of Measure |
SEMTEX® C-4 |
SEMTEX® PW 4 |
| Explosion heat | kJ/kg |
3 780 |
3 470 |
| Gas volume | dm3/kg |
1 090 |
1 140 |
| Temperature of explosion | °C |
2 800 |
2 550 |
| Oxygen balance | % O2 |
-47,8 |
-54,5 |
| Velocity of detonation | m/s |
min. 7 600 |
min. 7 500 |
| Brisance according to Hess | mm |
21 |
20 |
| Relative working ability | % |
77 |
75 |
| Trauzl test | cm3 |
350 |
330 |
| Density | kg/m3 |
1 500 |
1 500 |
| Firing | - |
Detonator No.8 |
Detonator No.8 |
| Shelf life | year |
10 |
10 |
Packaging
These explosives are packed in waxed paper. It is supplied in a form of bricks with a mass from 250 g to 3 000 g according to the customer´s requirements. There are usually 25 kg of explosives in one box.