The material cast iron

The material used for Düker cast iron sewage pipes and fittings corresponds to the regulations of DIN EN 877 with the following characteristics:

Density:	Approx. 7.2 kg/dm³ (71.5 KN/m³)
Minimum tensile strength:	150 MPa for fittings, 200 MPa for pipes
Compressive strength:	Approx. 3 to 4 times the value of the minimum tensile strength
Shearing strength:	1.1 to 1.6 times the value of the minimum tensile strength
Crushing strength:	350 MPa (for DN < 250) or 332 MPa (for DN = 250 or more)
Poisson’s number:	0,3
Coefficient of length expansion:	0.0105 mm/mK (between 0º and 100 ºC)
Thermal conduction coefficient:	50 - 60 W/mK (at 20 ºC)
Modulus of elasticity:	8 x 104 to 12 x 104 N/mm²

Coating technologies:

Coatings protect and finish cast iron sewage pipes and fittings. Coating technologies distinguish a manufacturer for his know-how and experience.