"Ortz" System

Characteristics of the materials

Spheres:
Carbon steel F-1140 in accordance with UNE-36011 (similar to AISI 1040 or 1045 and to steel CK-40 in accordance with DIN norms.

Tube:
Normally, tubes made in threes with longitudinal welding are used.  They are easy to weld tubes which fulfil the specifications described in the Spanish regulation MV-108-1976.

The qualities usually used are A-37 and A-42 and to a lesser extent, A-52, in accordance with UNE - 36080.  These are approximately equivalent, in terms of other regulations, to the qualities ST 3373-2. RST 42.2 AND ST 52-3, in accordance with DIN 17100.

Conical caps:
Normally, these are obtained by forging weldable steel F-1120, in accordance with UNE 36011 (Approximate equivalences:  AISI 1035 or CK s/DIN)

Occasionally, they can be obtained by bar mechanization, using the same material.  In any case, the welding drill and the bevel are mechanized to achieve the precise dimensional tolerance points.

Screws:
These are obtained from steel F-1250, in accordance with UNE  36012 (equivalent to 34 Cr Mo 4 in accordance with DIN 17200, or to AISI  4340).  In order to guarantee greater endurance of the material, and without affecting its capacity, tempering toughens the screws.