1. Material Standards & Grades

Primary Standards:

• EN 10083-3 - Steels for quenching and tempering

• ASTM A29 - Steel Bars, Carbon and Alloy

• SAE J404 - Chemical Compositions

Grade Equivalents:

2. Chemical Composition (% by weight)

3. Mechanical Properties (Quenched & Tempered Condition)

4. Physical Properties

5. Product Specifications

Quenching & Tempering Process:

7. Machinability & Weldability

Machinability Rating:

• 34CrMo4: 65% (compared to 1.0% C steel)

• 42CrMo4: 60%

• 41CrMo4: 55%

• 51CrV4: 50%

Weldability:

• Preheating: 150-300°C

• Post-weld heat treatment: Required

• Welding methods: SMAW, GTAW, GMAW

8. Testing & Inspection

Mandatory Tests:

• Tensile test (EN ISO 6892-1)

• Impact test (EN ISO 148-1)

• Hardness test (EN ISO 6506-1)

• Chemical analysis (EN 10204 3.1)

• Ultrasonic testing (EN 10160)

• Macro examination

Optional Tests:

• Fracture toughness test

• Fatigue test

• Creep test

• Microstructure analysis

• Non-destructive testing

9. Applications

Primary Applications:

• Automotive: Crankshafts, axles, gears

• Aerospace: Landing gear components

• Oil & Gas: Drill collars, tool joints

• Machinery: High-strength shafts, spindles

• Tooling: Dies, molds, fixtures

• Construction: High-strength fasteners

Industry Applications:

• Power transmission components

• Heavy equipment manufacturing

• Defense industry

• Mining equipment

• Marine engineering

*All alloy steel plates are manufactured according to EN 10083-3 standards and can be customized to meet specific mechanical property requirements and application needs.*