C55 (France / AFNOR NF) Material Properties

Other designations:
Material group: Ferrous Alloys / Structural and constructional steels
Country/Standard: France / AFNOR NF

Data updates

Latest Update: 2019-06
Total number of updates: 2
Update History:
2018-10

Mechanical Properties

Temperature

0 - 30°C
PROPERTY / VALUE
Yield Strength, Rp0.2 val1
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MPa view details
Tensile Strength 490 — 1100 MPa view details
Elongation, A 5 % view details
Reduction of Area val1
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% view details
Brinell Hardness (HB) 181 — 269 view details
Yield Strength, Rp0.2 val1
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ksi view details
Tensile Strength 71.1 — 159.5 ksi view details
Elongation, A 5 % view details
Reduction of Area val1
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% view details
Brinell Hardness (HB) 181 — 269 view details

Physical Properties

Temperature

0 - 30°C
PROPERTY / VALUE
Modulus of Elasticity 190 — 210 GPa view details
Density 7.67 — 7.86 kg/dm³ view details
Poisson Coefficient 0.27 — 0.3 view details
Modulus of Elasticity 27.6 E+03 — 30.5 E+03 ksi view details
Density 0.277 — 0.284 lb/in³ view details
Poisson Coefficient 0.27 — 0.3 view details

Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.52 – 0.60
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
≤ 0.40
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Cr+Mo+Ni
VALUE
≤ 0.63
UNIT
%
CAS NUMBER
CRITERIA
Mn
VALUE
val1
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UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Mo
VALUE
val1
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UNIT
%
CAS NUMBER
7439-98-7
CRITERIA
Ni
VALUE
val1
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UNIT
%
CAS NUMBER
7440-02-0
CRITERIA
P
VALUE
val1
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UNIT
%
CAS NUMBER
7723-14-0
CRITERIA
S
VALUE
val1
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UNIT
%
CAS NUMBER
7704-34-9
CRITERIA
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3

EN 10083-2: 2006 / Steels for quenching and tempering - Part 2: Technical delivery conditions for non alloy steels

Heat Treatments

  • <b> Hardening: </b> 805-845°C (Temperatures at the lower end of the range are generally used for water, and those at the upper end for oil quenching. Time for austenitizing as a guide: at least 30 min.); <br> <b>Quenching agent: </b> Oil or water (Other quenching agents such as synthetic quenchants may also be used.); <br> <b>Tempering: </b> 550-660°C (Time for tempering as a guide: at least 1h.); <br> <b>Normalizing:</b> 825-865°C.
  • Austenitizing (at least 30 min), quenching in oil or water: 810-850°C (the temperatures at the lower end of the range are generally applicable to quenching in water and those at the upper end for quenching in oil), other quenching agents such as synthetic quenchants may also be used; Tempering: 550-660°C (at least 60 min); Normalizing: 825-885°C, austenitizing (at least 30 min).