Lingang New Area, China (Shanghai) Pilot Free Trade Zone

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42CRMO alloy steel plate

Durable 42CRMO alloy steel plate with superior corrosion resistance for industrial and marine use.

1. Basic Information

  • Material Name: 42CrMo Alloy Steel
  • Standard Equivalent:
    • China: GB/T 3077 – 42CrMo
    • Germany: DIN 1.7225
    • USA: AISI 4140 (similar)
  • Steel Type: Low-alloy, high-strength structural steel
  • Heat Treatment: Usually supplied in quenched and tempered condition (Q+T)

42CRMO alloy steel plate

2. Chemical Composition (Typical)

Element Content (%)
C 0.38 – 0.45
Si 0.17 – 0.37
Mn 0.50 – 0.80
Cr 0.90 – 1.20
Mo 0.15 – 0.30
P, S ≤ 0.035 (each)

3. Common Specifications

Thickness Width Length Delivery Condition
6 mm – 300 mm 1000 mm – 2500 mm 2000 mm – 12000 mm Hot rolled, Q+T (quenched & tempered)

 

4. Key Mechanical Properties (Q+T Condition)

Property Typical Value
Tensile Strength 850 – 1100 MPa
Yield Strength ≥ 680 MPa
Elongation ≥ 12%
Impact Toughness ≥ 47 J (at -20°C)
Hardness (HB) 197 – 235 HB

5. Key Features

Feature Description
High Strength & Toughness Excellent mechanical strength after heat treatment.
Good Hardenability Suitable for large-section components.
Wear & Fatigue Resistance Great for stressed mechanical parts.
Machinability Easy to machine in a tempered condition.
Moderate Corrosion Resistance It can be improved with coating or plating.

6. Typical Applications

  • Gears and shafts
  • Automotive parts (e.g., crankshafts, axles)
  • Pressure vessels
  • Forged components
  • High-load fasteners
  • Oilfield equipment

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