B.S. S 124 Stainless steels

Material group: Ferrous Alloys / Stainless steels
Country / Standard: United Kingdom / B.S.

Data updates

Latest Update: 2021-07
Total number of updates: 1
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This material has 29 properties — only a subset is shown here.

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B.S. S 124 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.15 – 0.25
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
12.0 – 14.0
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
≤ 1.5
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Mo
VALUE
val1
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UNIT
%
CAS NUMBER
7439-98-7
CRITERIA
Mo+Zr
VALUE
val1
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UNIT
%
CAS NUMBER
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
CRITERIA
Zr
VALUE
val1
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UNIT
%
CAS NUMBER
7440-67-7

BS 2S 124: 1964 / Specification for aircraft material. 12 per cent chromium corrosion-resisting steel (free machining) (45/55 tonf/sq in: limiting ruling section 6 in)

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B.S. S 124 Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 215 GPa
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Electrical Resistivity
0.588 Ω∙mm²/m
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Density
val1
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kg/dm³
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Electrical Conductivity
val1
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S/m
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Poisson Coefficient
val1
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This material has 29 properties — only a subset is shown here.

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B.S. S 124 Heat Treatments

  • Hardened in oil or air from a temperature between 950°C and 10200°C (1740°F and 1870°F). Temper at a suitable temperature between 650°C and 750°C (1200°F and 1380°F). Hardened and tempered bars which have been subjected to a cold straightening or cold rolling operation shall be given a stress relieving treatment which shall be sufficient to restore the proof stress.

B.S. S 124 Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
696 — 853 MPa
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Brinell Hardness (HB)
201 — 255
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Elongation, A
≥ 11 %
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Impact Energy
val1
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J
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Vickers Hardness (HV)
val1
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Yield Strength, Rp0.2
val1
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MPa
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  • -Cross References
  • 10Composition
  • 6Mechanical Properties
  • 11Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability
  • 1Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
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