Lucien SALLEI

High yield strength steels

Weight reduction

The yield point of extra and ultra high yield strength steels is higher than that of conventional steels

Thanks to their higher elastic limits, extra and ultra high yield strength steels can replace thicker steels while retaining the same strength levels

Generally speaking, we can say that doubling the elasticity allows the thickness of the steel to be reduced by one third

Mathematically, the reduction in thickness is inversely proportional to the quotient of the root of the ultimate tensile strength

To make the best use of the advantages of high yield strength steels it is generally recommended to do the design studies using a high strength steel, rather than simply modifying an existing design

High yield strength steels

High yield strength steels are characterised by high

ductility, controlled internal purity, a fine grain structure and a low carbon content

Advantages

High yield strength steels combine :

Excellent mechanical characteristics

Resistance to fatigue

Thanks to their high strength, these steels are particularly

suitable when weight saving is the aim

They are often used in the construction industry

Applications

High yield strength steels are used in sectors as diverse as transport (site vehicles, trailers, agricultural machines, etc.) and construction (cranes, safety barriers, lighting columns, etc.)

High yield strength steels make it possible to envisage significant weight reduction especially in cranes and trailers for heavy vehicles (increased payload)