Hardfacing Electrodes
SUPERLINK-650LH
A basic-coated (low-hydrogen) extremely hard hardfacing electrode depositing very hard, sound, non-machinable weld metal. The hardness depends on parent metal dilution and number of layers applied. Particularly suitable for resistance to extreme abrasion. Low-hydrogen coating reduces risk of underbead cracking on higher-carbon base metals.
Technical specifications
| C | Cr | Mn | Si | Fe |
|---|---|---|---|---|
| 4.0–6.0% | 26–38% | 0.30–0.80% | 0.80–1.5% | balance |
| Hardness | 58–64 HRC (as deposited, 2 layers) |
|---|---|
| Notes | Non-machinable | Check-cracking normal |
Welding procedure & parameters
DC+ (DCEP). Flat position preferred. Preheat 200°C–350°C. Re-dry 250°C–300°C/1 hr before use. Apply buffer layer on manganese steels.
Typical applications
Severe abrasion applications on alloy or carbon steels: bucket teeth, excavator components, conveyor worm screws, cement mill hammers, clinker handling, crusher mantles. Preferred over rutile-coated grades when welding on higher-carbon or heat-treated base metals.
Storage & handling notes
Re-dry at 250°C–300°C for 1 hr. Low-hydrogen type provides advantage on carbon-sensitive base metals. Diffusible H: typically ≤10 ml/100g.
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