51Si7 (France / AFNOR NF) Material Properties

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

Data updates

Latest Update: 2019-05
Total number of updates: 1
Update History:

Mechanical Properties

Temperature

0 - 30°C
PROPERTY / VALUE
Yield Strength, Rp0.2 val1
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MPa view details
Tensile Strength 1450 — 1750 MPa view details
Elongation, A 6 % view details
Impact Energy val1
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J view details
Brinell Hardness (HB) ≤ 293 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 210.3 — 253.8 ksi view details
Elongation, A 6 % view details
Impact Energy val1
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ft·lb view details
Brinell Hardness (HB) ≤ 293 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 — 8 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 — 0.289 lb/in³ view details
Poisson Coefficient 0.27 — 0.3 view details

Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.48 – 0.54
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Mn
VALUE
0.50 – 0.80
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
P
VALUE
≤ 0.025
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 35-590: 1992 / Iron and steel - Tool steels

Heat Treatments

  • <b>Water quenched </b> at 880°C ± 10°C and <b> tempered </b> 450°C ± 10°C;<br> The Jominy hardenability test, quenched: 880°C.
  • Heat treated: 880°C, quenched in water; Tempered at 180°C for 1 hour.