Chapter I: I Izod Test

I

I

Symbol for the element iodine.

ID

Abbreviation for internal diameter.

ignition temperature

The minimum temperature required to initiate or cause self-sustained combustion independent of a heat source.

See also autoignition temperature.

ILMA

Abbreviation for Independent Lubrication Manufacturers Association.

Illium

Proprietary trade names of Stainless Foundry & Engineering, Inc for a corrosive-resistant stainless steel alloys.

IMA

Abbreviation for the International Magnesium Association.

impact resistance

The amount of force or energy required to fracture a standard-size sample in an impact test such as the Izod or Charpy test. The resistance is expressed in terms of the number of foot-pounds or meter-kilograms of force required to break the specimen with a single blow. Sometimes called impact energy or impact value.

impact test

Tests to determine the shock resistance or toughness of a metal when subjected to high rates of loading, usually in bending, tension, or torsion. The quantity measured is the energy absorbed in breaking the specimen by a single blow, as in the Charpy or Izod tests.

imperfect thread

See also incomplete thread.

imperial metal

Copper-nickel alloys nominally containing 80% copper and 20% nickel.

In

Symbol for the element indium.

inch

A unit of length 1 in = 1/12 ft = 1/36 yd = 1/63,360 mi = 2.54000 cm.

included angle

See thread angle

inclusion

A state of one substance being completely enclosed in or surrounded within the other, as suspended material in a crystal lattice, or a nonmetallic material either wholly or partly locked within...