S.124 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of S.124

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B.S. S.124

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This page is mainly introduced the S.124 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of S.124,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Specification for aircraft material. 12 per cent chromium corrosion-resisting steel (free machining) (45/55 tonf/sq in: limiting ruling section 6 in)
  • Steel Garde:S.124
  • Type:Stainless Steels
  • Country:UK
  • Standard:B.S.
  • Standard Number:
    ITEM Standard Number Descriptions
    1 BS 2S 124 Specification for aircraft material. 12 per cent chromium corrosion-resisting steel (free machining) (45/55 tonf/sq in: limiting ruling section 6 in)
  • Application:Specification for aircraft material. 12 per cent chromium corrosion-resisting steel (free machining) (45/55 tonf/sq in: limiting ruling section 6 in)

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.15  0.25
Si   1.00
Mn   1.50
P   0.045
S 0.15  0.40
Cr 12.00  14.00
Ni   1.00
Mo   0.60
Nb/Ti  
Zr   0.60

Mechanical Properties

Tensile strength 969~455 σb/MPa
Yield Strength 612 σ 0.2 ≥/MPa
Elongation 50 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 885~424 -
HRC 30 -

Physical Properties

Thermal expansion 13-60 e-6/K
Thermal conductivity 66-63 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 0469-5051 째C
Density 1881-5105 kg/m3
Resistivity 0.50-0.60 Ohm.mm2/m
     

Heat Treatment Regime

Annealing

Quenching

Tempering

Normalizing

Q & T

Size Availability

Steel Grade Specification Processing range(mm)
S.124 Stainless Steels Round Bar and Hollow Bar Φ1 to Φ2000
Square and Flat Steel Φ10 to Φ100
Plate and Sheet 0.08-800(Thickness)*10-1500(Width)*Length
Tube or Pipe OD:Φ4-410; WT:1-35 mm; Lenght:10-12000
Coil and Strip Steel THK:0.1mm Width:1500mm
Forged Ring/Cylindrical/Disk

Technical specification/standard for download

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