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Kilogram-force per square centimetre

Unit of pressure

Unit of pressure

FieldValue
namekilogram-force per square centimetre
imageDa Lat locomotive dials.JPG
captionSoviet-made pressure gauges using kgf/cm2
quantityPressure
symbolkgf/cm2
symbol2at
units1SI units
inunits11 kgf/cm2
units2FPS units
inunits21 kgf/cm2

A kilogram-force per square centimetre (kgf/cm2), often just kilogram per square centimetre (kg/cm2), or kilopond per square centimetre (kp/cm2) is a deprecated unit of pressure using metric units. It is not a part of the International System of Units (SI), the modern metric system. 1 kgf/cm2 equals 98.0665 kPa (kilopascals) or 0.980665 bar—2% less than a bar. It is also known as a technical atmosphere (symbol: at).

Use of the kilogram-force per square centimetre continues primarily due to older pressure measurement devices still in use.

This use of the unit of pressure provides an intuitive understanding for how a body's mass, in contexts with roughly standard gravity, can apply force to a scale's surface area, i.e. kilogram-force per square (centi-)metre.

In SI units, the unit is converted to the SI derived unit pascal (Pa), which is defined as one newton per square metre (N/m2). A newton is equal to 1 kg⋅m/s2, and a kilogram-force is , meaning that 1 kgf/cm2 equals 98.0665 kilopascals (kPa).

In some older publications, kilogram-force per square centimetre is abbreviated ksc instead of kgf/cm2.

: {
-
≈ standard atmospheres
}

Ambiguity of at

The symbol "at" clashes with that of the katal (symbol: "kat"), the SI unit of catalytic activity; a kilotechnical atmosphere would have the symbol "kat", indistinguishable from the symbol for the katal. It also clashes with that of the non-SI unit, the attotonne, but that unit would more likely be rendered as the equivalent SI unit, the picogram.

References

References

  1. Dorf, Richard C.. (2003-11-24). "CRC Handbook of Engineering Tables". CRC Press.
  2. Suplee, Curt. (2009-07-02). "Special Publication 811".
  3. [http://physics.nist.gov/Pubs/SP811/appenB9.html#PRESSURE The NIST Guide for the use of the International System of Units], ''National Institute of Standards and Technology'', 18 Oct 2011
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