A 803 Grade 25-4-4 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of A 803 Grade 25-4-4

SAE A 803 Grade 25-4-4

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This page is mainly introduced the A 803 Grade 25-4-4 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of A 803 Grade 25-4-4,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Welded Ferritic Stainless Steel Feedwater Heater Tubes

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C   0.025
Si   0.75
Mn   1.00
P   0.04
S   0.04
Ni 3.35  4.50
Cr 24.50  26.00
Al  
Cu   0.50
Ti  
Fe  
N   0.035
Mo 3.50  4.50

Mechanical Properties

Tensile strength 978~455 σb/MPa
Yield Strength 454 σ 0.2 ≥/MPa
Elongation 74 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 851~705 -
HRC 30 -

Physical Properties

Thermal expansion 07-07 e-6/K
Thermal conductivity 95-15 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 6163-6061 째C
Density 0143-0722 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)
A 803 Grade 25-4-4 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