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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.（≤）
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	194～144	σb/MPa
Yield Strength	767	σ 0.2 ≥/MPa
Elongation	50	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	354～338	-
HRC	30	-

Physical Properties

Thermal expansion	94-65	e-6/K
Thermal conductivity	70-37	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	8730-6975	째C
Density	3940-5064	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