S.129 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of S.129

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B.S. S.129

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This page is mainly introduced the S.129 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of S.129,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Specification for 18/9 chromium-nickel corrosion-resisting steel (titanium stabilized) billets, bars, forgings and parts (540 MPa: limiting ruling section 150 mm)
  • Steel Garde:S.129
  • Type:Stainless Steels
  • Country:UK
  • Standard:B.S.
  • Standard Number:
    ITEM Standard Number Descriptions
    1 BS 2S 129 Specification for 18/9 chromium-nickel corrosion-resisting steel (titanium stabilized) billets, bars, forgings and parts (540 MPa: limiting ruling section 150 mm)
  • Application:Specification for 18/9 chromium-nickel corrosion-resisting steel (titanium stabilized) billets, bars, forgings and parts (540 MPa: limiting ruling section 150 mm)

Cross Reference Table(Equivalent Materials):

Material Standard Country
2S.129 B.S. UK

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C   0.12
Si 0.20  1.00
Mn 0.50  2.00
P   0.035
S   0.025
Cr 17.00  19.00
Ni 8.00  11.00
Mo  
Ti   5×C

Mechanical Properties

Tensile strength 069~237 σb/MPa
Yield Strength 512 σ 0.2 ≥/MPa
Elongation 10 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 670~742 -
HRC 30 -

Physical Properties

Thermal expansion 22-96 e-6/K
Thermal conductivity 22-75 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 8898-9676 째C
Density 5773-7848 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.129 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