Description

The 5% Nital Etch is a specialized metallographic etchant designed for etching mild steel, carbon steel, low alloy steel, cast iron, and select tool steel. It provides a high etching rate and is safe to store. This version of Nital is strong enough to be used for the weld penetration test and temper inspection (Nital etch test) of low alloy carbon steels. This product is made with reagent-grade chemicals using formula number 74, “Nital,” from ASTM Standard E407.

User Instructions:

Immerse or swab the polished surface for a few seconds to a minute. Keep the lid tightly closed after each use to avoid alcohol evaporation. Discard the solution if the color or appearance changes.

Product Applications:

Darken martensite.
Attack ferrite and outline ferrite boundaries.
Enhance the carbide/matrix interfaces.
Show grain size, grain flow, and alloy segregation banding.
Reveal hardened case, white layer, and decarburization layer.
Create replicas for Non-Destructive Examination (NDE) on boilers, pressure vessels, heat exchanger piping, and other components.

Packaging:

Nalgene® Leakproof Bottle, HDPE.