304 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 304

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UNS 304

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This page is mainly introduced the 304 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 304,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.

Steel, Corrosion Resistant, Bars, Wire, Shapes, and Forgings

  • Steel Garde:304
  • Type:Stainless Steels
  • Country:USA
  • Standard:UNS
  • Standard Number:
    ITEM Standard Number Descriptions
    1 SAE AMS-QQ-S-763B (1998) Steel, Corrosion Resistant, Bars, Wire, Shapes, and Forgings
    2 SAE AMS-T-6845A (1999) Tubing, Steel, Corrosion-Resistant (S30400), Aerospace Vehicle Hydraulic System 1/8 Hard Condition
    3 SAE AMS-T-8506B (1999) Tubing, Steel, Corrosion-Resistant, (304), Annealed, Seamless and Welded
    4 SAE J 2515 (1999) High temperature materials for exhaust manifolds
    5 SAE J 405 (1998) Chemical compositions of SAE wrought stainless steels
    6 SAE J 467 (1968) Special Purpose Alloys ("Superalloys")
    7 SAE J 452 Chemical compositions, mechanical and physical properties of SAE aluminum casting alloys
  • Metallographic Structure:Austenite
  • Application:Steel, Corrosion Resistant, Bars, Wire, Shapes, and Forgings

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C   0.08
Si   1.00
Mn   2.00
P   0.045
S   0.03
Cr 18.0  20.0
Ni 8.00  10.5
N   0.10

Mechanical Properties

Tensile strength 393~006 σb/MPa
Yield Strength 528 σ 0.2 ≥/MPa
Elongation 78 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 722~059 -
HRC 30 -

Physical Properties

Thermal expansion 80-72 e-6/K
Thermal conductivity 78-28 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 2185-4371 째C
Density 7871-3230 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)
304 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