38 B 3 (France / AFNOR NF) Material Properties

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

Data updates

Latest Update: 2020-07
Total number of updates: 2
Update History:
2019-05

Mechanical Properties

Temperature

≤ 0°C
0 - 30°C
PROPERTY / VALUE
Yield Strength, Rp0.2 val1
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MPa view details
Tensile Strength 540 MPa view details
Elongation, A 11 % view details
Impact Strength val1
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kJ/m² view details
Impact Strength val1
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kJ/m² view details
Brinell Hardness (HB) 156 view details
Rockwell Hardness (HR) val1
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view details
Yield Strength, Rp0.2 val1
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ksi view details
Tensile Strength 78.3 ksi view details
Elongation, A 11 % view details
Impact Strength val1
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ft·lb/in² view details
Impact Strength val1
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ft·lb/in² view details
Brinell Hardness (HB) 156 view details
Rockwell Hardness (HR) val1
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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
B
VALUE
0.0008 – 0.0050
UNIT
%
CAS NUMBER
7440-42-8
CRITERIA
C
VALUE
0.34 – 0.40
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Mn
VALUE
0.60 – 0.90
UNIT
%
CAS NUMBER
7439-96-5
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

NF A 35-556: 1984 / Iron and steel. Heat treatable steels for externally threaded fasteners for structural purposes

Heat Treatments

  • <b> Heated </b> in the range at 835-865°C, cooled in oil or water for d ≤ 40mm and in water for d > 40 mm and: <br> <b>Tempered I</b> at 500-600°C <br> <b>Tempered II</b> at 450-550°C <br> <b>Jominy test</b> at 850 ± 5°C<br>
  • <b>Hardened</b> at 835-865°C, quenched in oil <br /> <b>Tempered</b> at 500-600°C