Knowledge and terminology required for hardware stamping

When we need to buy hardware stamping parts, under the same sales negotiation experience, those with professional knowledge are lower than those without professional knowledge to get the quotation. This is certain. Then when purchasing hardware stamping parts such as precision terminals, What expertise and terminology should we know?

Residual stress(yield strength, conditional yield strength): symbol: σ R; Unit: MPa(or N/mm2), referring to the stress of the metal material after removing the pull call, the residual part of the gauge, and the elongation to a specified value; When the specified value is 0.2 %, the symbol is σ r0.2.

Strength limit: symbol: σ; Unit: MPa(or N/mm2), which refers to the maximum ability of the metal material to resist external force damage.

The strength is divided into:

Compressive strength: symbol σ BC, refers to the strength limit when external force is pressure

Bending strength: Symbol σ BB, refers to the strength limit when an external force is perpendicular to the axis of the material and the material is bent after action.

Shear strength: Symbol σ C, refers to the strength limit when the external force is perpendicular to the axis of the material and the material is sheared.

Tensile strength: symbol: σ B, refers to the strength limit when the external force is pulling force

Yield point(physical yield strength): symbol: σ S; Unit: MPa(or N/mm2) means that when a metal material is subjected to a certain degree of tensile force, its deformation(elongation) suddenly increases greatly the material's ability to resist external forces.

Elastic limit: refers to the metal material by external forces(pull) to a certain limit, if the external force is removed, its deformation(elongation) will disappear and restore the original state. The elastic limit refers to the metal material's ability to resist this limit of external forces.