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UTP HydroCav anti-wear & anti-corrosion
Classifications basic-coated stick electrode against cavitation wear, stainless
DIN 8555 EN 14700
E 5-UM-250-CKZT EZ Fe9
Characteristics and field of use
UTP HydroCav is suitable for wear-resistant surfacings on weldments where high resistance
to cavitation pitting, corrosion, pressure and impact is required, as for example in water
turbine construction and pump construction. Due to the strong ability of work-hardening
the weld deposit hardness under impact stress can be doubled. The main application field
are surfacing on soft martensitic 13/4 CrNi-steels on Kaplan turbine blades.
UTP HydroCav has good welding properties and is weldable in all positions, except verticaldown.
It has a stable arc, even weld build-up, and good slag removability.
Hardness of the pure weld deposit
as-welding condition approx. 21 HRC
After cold hardening approx. 50 HRC
Typical analysis in %
C Si Mn Cr Ni Co Fe
0,2 0,7 10,0 20,0 0,15 13,0 balance
Welding instruction
Clean welding area thoroughly to metallic bright. The interpass temperature should not
exceed 250 °C. Preheating of solid work pieces to 80 – 100 °C is advantageous. Weld stick
electrode with short arc and steep guidance. Re-drying: 2 hours at 300 °C
Welding positions
Current type DC (+) / AC
Form of delivery and recommended welding parameters
Electrodes Ø mm x L 2,5 x 350 3,2 x 350 4,0 x 350
Amperage 70 – 90 90 – 120 120 – 150
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