X-Ray

A form of radiant energy with extremely short wave length which has the ability to penetrate materials that absorb or reflect ordinary light. X-Rays provide a form of Non-Destructive testing.

Yield

Comparison of finished casting weight verses total weight of metal poured in a mold. A value expressed as a percentage indicating the relationship of the weight of a casting to the total composite of the casting and its gating system.

Yield Ratio

The ratio of yield strength to ultimate tensile strength.

Yield Strength

A measure of the amount of mechanical stress a material can withstand before it permanently deforms.

Young's Modulus (E)

See Modulus of Elasticity.

Zinc

A chemical element having symbol Zn, formula weigh 65.38, specific gravity 7.140, and melting point 419.4°C.

Zircon

Natural zirconium silicate, ZrSiO₄ containing 67.23% zirconium oxide, ZrO₄, and 32.77% silica, SiO₂, is used as a molding medium in steel foundries.

Zirconia

ZrO₂ an acid refractory up to 2,500°C (4,532°F) having good thermal shock resistance and low electrical resistively.

Zirconium

Silvery-white, metallic element, mp 1,860°C (3,380°F), a powerful deoxidizer when added to molten steel.