Main chemical composition

XGG1800：C:4-5%, Cr:30-40%, Mn:1-1.5% Fe and others: balance

XGG2000：C:3-4%, Cr:25-35%, Mn:1-1.5% ,Nb:3-5%,Fe and others: balance

XGG3000：C:3-4%, Cr:25-35%, Mn:1-1.5% ,W:4-6%,Fe and others: balance

Please note: Actual chemistry will vary with overlay thickness.

Microstructure

It is an austenitic matrix with 40-45% hexagonal primary carbides. The hardness of XGG chromium carbide particle is 1300HV.

Macro-hardness

The hardness is a composite of the hard chromium carbides and the tough austenitic matrix. The hardness can normally vary from 52 to 62HRC depending on the thickness of the overlay.

Abrasion Resistance

For the different grades of the plates and different thickness of the over layer, the wearness is ranging from 20-30 to 1 over mild steel , 4-8 to 1 over QT400 steel from ASTM G65 RWAT test result.

Characteristics

The overlay surface of XGG consists of a series of beads with numerous hairline cracks. These properly spaced crosscheck cracks are a natural stress relief phenomenon and are beneficial to the material. These cracks propagate through the overlay and end at the fusion line.

Flatness Tolerance and dilution

±3-4mm/1m of the length of the plate. Dilution of coated layer and substrate is about 1-2mm.

Impact Resistance

XGG plates can withstand continuous moderate impact. Thin over layer can withstand higher impact.

Temperature Range

For the different grades of the plates, XGG plates can keep the abrasion resistance when it works under 593℃.

Thickness Tolerance

±5% tolerance of the whole thickness.

A quality certificate is issued for every plate by XGG.