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FATT |
Transition temperature at which the inter-granular failure area is 50% of the original area after failure of various Charpy V-notch specimens. |
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Various temperatures may be used from – 180° C (liquid nitrogen) up to + 150°C and above |
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E / G |
E = Modulus of elasticity longitudinal G = Modulus of elasticity tangential |
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Em |
Failure energy with pendulum hammers test for impact strength, types: Kv - KCU - DVM - Mesnager - KW |
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N |
Force: Newton |
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J |
Energy: Joule |
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Ksi |
Stretch: thousands of pounds– force per square inch |
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lbf |
Force - pound |
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Rm – R - TS |
Tensile strength calculated with proportional tensile specimens, expressed in N/mm˛ |
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Rp 0.2 YS 0.2 |
Yield strength normally taken at 0.2% and in some cases at 0.02%. Value obtained from tensile test, expressed in N/mm˛ / Mpa |
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Re - ReH |
Total strength, read directly on the gauge of the tensile testing equipment as it corresponds to a stop in the increase in load |
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E% - A% |
Percentage elongation after fracture. Value obtained from tensile test |
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A% = [ (Lu – Lo) : Lo ] x 100 |
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Lu = final gauge length after fracture |
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Lo = original gauge length |
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Z% - C% |
Reduction of area after failure. Value obtained from tensile test |
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C% - Z% = [ (So – Su) : So ] x 100 |
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So = original cross-sectional area of the parallel length |
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Su = minimum cross-sectional area after fracture |
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Kcu |
Impact strength with U notch, proportional specimens tested with pendulum hammers with energy measurement expressed in J |
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Kv |
Impact strength with V notch |
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HB
10/3000 |
Brinell hardness EN 10003, calculated on the surface of the material. It is useful for knowing the approximate tensile strength of the material |
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HB 10/3000 |
10 = ball dia. in mm, 3000 = pressure in kg |
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HRC
Scale 150 |
Rockwell hardness “C” EN 10109, normally used on materials with a tensile strength of from 760 N/mm˛ to 2420 N/mm˛ |
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HV |
Vickers hardness, normally used on materials with a tensile strength of from 1320 N/mm˛ to above 2500 N/mm˛ |
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Most commonly used terms |
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USA - UK |
Germany |
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Italy |
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France |
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R - TS |
Tensile strength |
Zugfestigkeit |
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Rottura |
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Resistance |
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Rp - YS |
Yield strength |
Streckgrenze |
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Snervamento |
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Limite d’elasticité |
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A% |
Elongation |
Dehnung |
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Allungamento |
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Allongement |
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C% |
Reduction |
Einschnurung |
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Contrazione |
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Striction |
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Kv, Kcu
etc |
Impact strength |
Kerbschlagzahigkeit |
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Resilienza |
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Resilience |
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HB HV HRC |
Hardness test |
Härte |
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Durezza
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Dureté |
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