Comparison centre

Metal Finishing and Material Comparisons

Choose materials, processes, colours and test criteria from the decisions engineering, purchasing and QC teams make in real work.

Choose the decision you need to make

Each guide covers selection criteria, limits and links to the relevant tool or service.

hardening

How Hard Can SCM440, SCM435 and S45C Get? Choosing a Steel Grade

A practical comparison of common hardening steels—S45C, SCM435, SCM440, SK5, SUP9—showing the hardness each can reach and which fasteners they suit.

Read article

coloring

Zinc Plating Colour Chart: White, Blue, Yellow, Rainbow, Black, Green

The colour of zinc plating comes from the chromate passivation layer on top—it is not just looks; it also signals corrosion resistance. Here is the chart.

Read article

plating

Zinc Plating vs Hot-Dip Galvanizing vs Chrome: Which to Choose

Compare electroplated zinc (Cr3+), hot-dip galvanizing and chrome plating on corrosion protection, thickness, cost and fit — with a buyer’s guide for screws, nuts and bolts.

Read article

plating