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42CRMO alloy steel plate

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

42CRMO alloy steel plate

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)

2. Chemical Composition (Typical)

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

3. Common Specifications

السُمك	العرض	الطول	حالة التوصيل
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)

الممتلكات	Typical Value
قوة الشد	850 – 1100 MPa
قوة المردود	≥ 680 MPa
الاستطالة	≥ 12%
Impact Toughness	≥ 47 J (at -20°C)
Hardness (HB)	197 – 235 HB

5. Key Features

الميزة	الوصف
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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