Understanding D608 Chromium-Molybdenum Hardfacing Electrode

D608 (Core Definition: Cr-Mo Cast Iron Hardfacing Electrode, Most Common Use Case)

English Full Name: D608 Chromium-Molybdenum Cast Iron Hardfacing Electrode

Product Category: Wear-Resistant Hardfacing Welding Electrode (Conforms to GB/T 984 EDZ-A1-08 Standard)

Core Purpose: For depositing wear-resistant Cr-Mo carbide-rich cast iron layers on components subject to abrasive wear (sand, ore) and light impact.

Key Technical Details (English)

Electrode Type: Graphite – coated flux, AC/DC applicable (DC reverse polarity preferred).
Deposited Metal Chemistry (Guaranteed, %):ElementContent RangeTypical ValueCarbon (C)2.50–4.503.40Chromium (Cr)3.00–5.003.56Molybdenum (Mo)3.00–5.004.00
Hardness: Deposited layer ≥ 55 HRC (Rockwell C).
Specifications & Reference Current (DC+):Electrode Diameter (mm)Recommended Current (A)φ3.290–120φ4.0130–160φ5.0170–210
Welding Notes:
- Bake at 250°C for 1 hour before welding.
- Preheat workpiece to 400–500°C; post – weld slow cooling to prevent cracking.
- Deposit can only be ground (not machined by cutting).
Typical Applications: Agricultural machinery parts, mining equipment, dredge components, sand – handling machinery, and other parts under abrasive wear and light impact loads.