Q345q E chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Q345q E

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Q345q E

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This page is mainly introduced the Q345q E chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Q345q E,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.

Mechanics performance 


Steel thickness/mm: more than 16
The yield point | σ s frequency/MPa: 235
Tensile depth | σ b frequency/MPa: 390
Elongation | δ frequency / (%) 5:26
Impact absorption power AKV/J | testing temperature / ℃ :-20
Impact absorption power AKV/J | longitudinal frequency/J | : 27
Impact absorption power AKV/J | time frequency/J | : 27
180 ° of cold bending test | d-apex diameter, a-the following steel thickness thickness when/mm | than 16: d = 1.5 a
180 ° of cold bending test | d-apex diameter, a-the following steel thickness thickness when/mm | > 16: d = 2.5 a
  • Steel Garde:Q345q E
  • Type:Special Alloy
  • Country:China
  • Application:Bridge structure with steel

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength 365~439 σb/MPa
Yield Strength 340 σ 0.2 ≥/MPa
Elongation 63 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 213~348 -
HRC 30 -

Physical Properties

Thermal expansion 90-42 e-6/K
Thermal conductivity 02-23 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 7643-3057 째C
Density 9734-2583 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)
Q345q E 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