AISI 688 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of AISI 688

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AISI AISI 688

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This page is mainly introduced the AISI 688 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of AISI 688,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
AISI 688
  • Steel Garde:AISI 688
  • Type:Special Alloy
  • Country:USA
  • Standard:AISI
  • Application:precipitation hardening

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength 047~285 σb/MPa
Yield Strength 480 σ 0.2 ≥/MPa
Elongation 37 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 784~139 -
HRC 30 -

Physical Properties

Thermal expansion 50-28 e-6/K
Thermal conductivity 91-38 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 5409-0291 째C
Density 4721-6090 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)
AISI 688 Special Alloy 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