Axles are made by heating rods of iron embedded in charcoal powder

CHEMISTRY · Single correct · GCSE · Chemistry · Bonding, Structure and the Properties of Matter · Bonding, Structure and the Properties of Matter

Problem

Axles are made by heating rods of iron embedded in charcoal powder. The process is known as: (1) Tempering (2) Annealing (3) Nitriding (4) Case hardening

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