1.4550 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 1.4550

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B.S. 1.4550

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This page is mainly introduced the 1.4550 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 1.4550,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel
  • Steel Garde:1.4550
  • Type:Stainless Steels
  • Country:UK
  • Standard:B.S.
  • Standard Number:
    ITEM Standard Number Descriptions
    1 BS EN 10028-7 Flat products made of steels for pressure purposes - Part 7: Stainless steels
    2 BS EN 10088-1 Stainless steels - Part 1: List of stainless steels
    3 BS EN 10088-2 Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes
    4 BS EN 10088-3 Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes
    5 BS EN 10088-5 Stainless steels - Part 5: Technical delivery conditions for bars, rods, wire, sections and bright products of corrosion resisting steels for construction purposes
    6 BS EN 10216-5 (2004) Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 5: Stainless steel tubes
    7 BS EN 10217-7 Welded steel tubes for pressure purposes - Technical delivery conditions - Part 7: Stainless steel tubes
    8 BS EN 10222-5 Steel forgings for pressure purposes - Part 5: Martensitic, austenitic and austenitic-ferritic stainless steels
    9 BS EN 10250-4 Open die steel forgings for general engineering purposes - Part 4: Stainless steels
    10 BS EN 10253-3 Butt-welding pipe fittings - Part 3: Wrought austenitic and austenitic-ferritic (duplex) stainless steels without specific inspection requirements
    11 BS EN 10253-4 Butt-welding pipe fittings - Part 4: Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements
    12 BS EN 10272 Stainless steel bars for pressure purposes
    13 BS EN 10296-2 (2005) Welded circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel
    14 BS EN 10297-2 (2005) Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel
  • Metallographic Structure:Austenite
  • Application:Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C   0.08
Si   1.00
Mn   2.00
P   0.045
S   0.015
Cr 17.00  19.00
Ni 9.00  12.00
Mo  
Nb+Ta   1.00

Mechanical Properties

Tensile strength 126~998 σb/MPa
Yield Strength 103 σ 0.2 ≥/MPa
Elongation 00 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 697~790 -
HRC 30 -

Physical Properties

Thermal expansion 05-90 e-6/K
Thermal conductivity 00-23 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 2978-1868 째C
Density 7320-6807 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)
1.4550 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