
ENDURA Cr (CHROMIUM CARBIDE OVERLAY)
Chrome Carbide Overlay with ENDURA (550 BHN) Backing Plate
ENDURA Cr has been developed for unique and severe wear and impact applications. The chromium carbide overlay (CCO) has a surface hardness of 700-850 BHN depending on the number of passes. As the “overlay” surface is worn away, the ENDURA backer plate “Work Hardens” to 540-560, providing extra service life.
Key Benefits of ENDURA Cr (Chromium Carbide Overlay)
- ENDURA backing plate with 550 BHN, leads to extra service life
- ENDURA Cr withstands deformation better than regular chromium carbide overlay (CCO) plate due to ENDURA’s homogeneous micro structure and TRIP effect (transformation induced by plasticity)
- ENDURA’s high yield (195 ksi) and tensile strength (240 ksi) leads to less cracking
- Outstanding performance at elevated temperatures of 350°C (660°F)
- Can be formed, welded and machined
Microstructure of ENDURA Cr (Chromium Carbide Overlay)
The microstructure of ENDURA Cr contains primary chromium-rich carbides and refined multiple-alloy complex carbides with a typical hardness of 2500 to 3000 HK4) dispersed evenly in a ductile eutectic austenite matrix. The typical volume fraction of primary chromium-rich carbides is maintained between 30 to 40% with 7 to 10% of multi-alloy complex carbides.
Typical Applications for ENDURA Cr (Chromium Carbide Overlay)
ENDURA Cr is widely used in many industries including mining, cement, and power generation. Some specific applications include:
Dimensions
Overlay Thickness
Metric Unit | Imperial Unit |
6 mm on 6 mm | 1/4″ on 1/4″ |
10 mm on 10 mm | 3/8″ on 3/8″ |
6 mm on 20 mm | 1/4″ on 3/4″ |
6 mm on 25 mm | 1/4″ on 1″ |
6 mm on 32 mm | 1/4″ on 1-1/4″ |
Plate Sizes
Metric Unit | Imperial Unit |
1.2 m x 2.4 m | 4′ x 8′ |
1.5 m x 3.0 m | 5′ x 10′ |
1.8 m x 3.0 m | 6′ x 10′ |
Mechanical Properties
Tolerances
Installing ENDURA Cr
No special equipment is needed to install ENDURA Cr products. Welding and bolting are the common methods for installing ENDURA Cr chromium carbide overlay plate or wear parts onto your equipment.
When joining base metal, use 480 MPa (70 ksi) or 560 MPa (80 ksi) consumables. Any surface exposed to severe wear should be protected with hard-surfacing consumables.
Welding and Bolting to Your Substrate
Cutting
ENDURA Cr can be cut by plasma, laser, water jet, arc gouge, and abrasive saw cutting. It cannot be cut by oxy-fuel flame cutting. ENDURA Cr should be cut from the base metal side only to avoid carbon contamination.
When beveling, ENDURA Cr overlay plate can be burned from the hard side. Cutting speeds need to be reduced when cutting carbides.
Forming
ENDURA Cr is typically formed with overlay to the inside but can be roll formed with overlay to the outside. Avoid bending plate parallel to the welding bead direction.
The staggered cracking pattern on the overlay surface ensures good formability when bending. For bending radius recommendations, see chart below.
Machining
Machining ENDURA Cr with conventional methods is not recommended. It can be finished by grinding.
Countersunk holes can be precisely produced by EDM (Electrical Discharge Machining). Pre-machined mild steel inserts can be used if extra machining is required.
Recommended Cutting Speed at Different Plasma Currents and Thickness
Plate thickness | Carbon steel | ||||
---|---|---|---|---|---|
130 amps | 200 amps | 260 amps | 400 amps | 360 amps | |
6 mm on 3 mm 1/8″ on 1/4″ |
1920 mm/min 75 inches/min |
2655 mm/min 105 inches/min |
3080 mm/min 120 inches/min |
3540 mm/min 140 inches/min |
4200 mm/min 165 inches/min |
6 mm on 6 mm 1/4″ on 1/4″ |
1920 mm/min 75 inches/min |
2655 mm/min 105 inches/min |
3080 mm/min 120 inches/min |
3540 mm/min 140 inches/min |
4200 mm/min 165 inches/min |
10 mm on 10 mm 3/8″ on 3/8″ |
1010 mm/min 40 inches/min |
1265 mm/min 50 inches/min |
1735 mm/min 65 inches/min |
2440 mm/min 95 inches/min |
4200 mm/min 165 inches/min |
12 mm on 12 mm 1/2″ on 1/2″ |
552 mm/min 20 inches/min |
1225 mm/min 45 inches/min |
1465 mm/min 55 inches/min |
1800 mm/min 70 inches/min |
4200 mm/min 165 inches/min |
Contact Us Today to Explore Applications for ENDURA Cr (Chromium Carbide Overlay)
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