We've assembled a list of terms and acronyms used and a simple description. If you need any further information or assistance, please don't hesitate to Contact Us
Annealing: is a heat treatment that alters a material to increase its ductility and to make it more workable. It involves heating material to above its critical temperature, maintaining a suitable temperature, and then cooling. Annealing can induce ductility, soften material, relieve internal stresses, refine the structure by making it homogeneous, and improve cold working properties.
BDMS: Bright-drawn mild steel. This is hot-rolled steel that is drawn through a die to create a highly-dimensionally-accurate and scale-free surface.
BRM: Bright Round Metric
Chamfering: creating an angled edge on the end of a cylindrical section.
Cold-Drawn Steel: see BDMS.
Free-Cutting Steel: also known as free machining steels are carbon steels that have sulphur, lead, bismuth, selenium, tellurium, or phosphorus added. Sulfur forms the compound manganese sulfide, which is soft and acts as a chip-breaking discontinuity. It also acts as a dry lubricant to prevent a built up edge on the cutting tool. Lead works in a similar way to sulphur. Bismuth achieves a free machining steel by melting into a thin film of liquid for a fraction of a microsecond to lubricate the cut. Other advantages to bismuth include: more uniformly distributed because of its similar density to iron; more environmentally friendly, as compared to lead; still weldable.
Ground Steel: bright steel that has been ground with abrasives to achieve exceptional dimensional tolerances and accuracy.
Mild steel: is the most common form of steel because its price is relatively low while it provides material properties that are acceptable for many applications, more so than iron. Low-carbon steel contains approximately 0.05–0.3% carbon and mild steel contains 0.3–0.6% carbon; making it malleable and ductile. Mild steel has a relatively low tensile strength, but it is cheap and malleable; surface hardness can be increased through carburising.
Pickling: a chemical treatment that removes any oxidisation from the surface of the hot-rolled steel prior to being cold drawn.