BÖHLER FOX CN 17/4 PH is a basic coated electrode of the E Z 17 4 Cu B / E630-15 (mod.) type with high strength, for welding similar precipitation hardening rolled, forged and cast CrNiCu steels. It is popular for components in the paper industry, compressor rotors, fan blades, press plates in plastics processing and aerospace work.
The base grades are 1.4405 (GX4CrNiMo16-5-1), 1.4418 (X4CrNiMo16-5-1) and 1.4525 (GX5CrNiCu16-4). The arc is stable, the pool is easy to control, the slag detaches easily and the bead comes out clean. The deposit holds less than 5 ml of hydrogen per 100 g. Welding runs in all positions except vertical down, and with proper post weld heat treatment, that is solution annealing plus precipitation hardening, impact values down to minus 50 degrees C are achievable.
- Classification EN ISO 3581-A: E Z 17 4 Cu B 4 3 H5
- AWS classification A5.4 / SFA-5.4: E630-15 (mod.)
- Coating: basic
- Current: DC+
- Diameters: 3.2 / 4.0 mm
- Lengths: 350 mm
- Approvals: CE
The properties of this deposit are built by heat treatment, so agree it before welding: without solution annealing and ageing you will not reach the figures the maker gives. Dry the electrodes to the maker data sheet and work from a quiver. Weld on direct current with the electrode positive, straight beads, watching the interpass temperature. Leave a generous machining allowance, PH parts usually go to tolerance.
