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DIN 8555:
E 7 – UM – 250 – K
EN 14700: E Fe 9
Recovery: 120%
Current: = (+) / ~
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| C: 0,8 – 1,2
Mn: 12,0 – 14,0
Ni: 2,5 – 3,5
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Basic coated electrode for overlays on maganese hard steel like dredger teeth, crusher jaws etc. that is parts mainly subject to impact load.
Hardness of the welding deposits 200 – 250 HB, which increases to 450 – 550 HB by strian hardening, leading to much better wear-resistance.
If possible, welding should be without great head input. It is recommended to interrupt the welding process from time to time in order to cool the overlayed welding deposit with water.
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| H: 200 – 250 HB
Strainhardened:
450 -550 HB
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