EN 10083‑3 defines a family of quench‑and‑tempered alloy steels—including 34CrMo4, 42CrMo4 (4140), and 51CrV4 (6150)—engineered for maximum strength (900–1,300 MPa tensile) and toughness. Ideal for heavy-duty components like shafts, crankshafts, hydraulic rams, and springs.
Key Grades & Parameters
| Grade | C % | Cr % | Mo % | V % | Tensile (MPa) | Yield (MPa) | Surface Hardness (HRC) |
|---|---|---|---|---|---|---|---|
| 34CrMo4 | 0.30–0.37 | 0.9–1.2 | 0.15–0.30 | – | 900–1,300 | ≥500–750 | 58–62 (8–20 mm) |
| 42CrMo4 | 0.38–0.45 | 0.9–1.2 | 0.15–0.30 | – | 750–1,200 | ≥500–750 | 58–62 (8–20 mm) |
| 51CrV4 | 0.47–0.55 | 0.9–1.2 | – | 0.1–0.25 | Comparable high | Comparable | 60–64 (quenched) |
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Hardenability: Excellent Jominy depths (~14 mm) comparable to premium steels
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Fatigue resistance: Up to 650 MPa endurance limit seen in grades like 34CrMo4/42CrMo4
Core Advantages
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Exceptional Strength + Toughness – High tensile/yield and surface hardness (up to 62 HRC) post-quenching
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Deep Hardenability for Large Parts – >14 mm hardenability enables reliable properties in thick forgings
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Wear & Fatigue Resistance – Superior cyclic life (~650 MPa endurance) for powertrain and rotating parts
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Machinable & Weldable – Designed for aftermarket machining, with preheat requirements and proven weldability
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Global Interchangeability – Recognized equivalents like SAE 4140, SCM440 (42CrMo4), AISI 6150 (51CrV4)
Typical Applications
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Power Transmission & Heavy Machinery: Forged shafts, hydraulic rams, axle spindles
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Automotive & Racing: Crankshafts (42CrMo4 up to 62 HRC), axles, leaf springs
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Spring Manufacturing: 51CrV4/6150 steel coils meeting ISO 6020/2 standards
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Hydraulics & Construction: Cylinder rods, excavator pins, ram pistons—built to handle high loading cycles
Specifications & Supply
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Sizes: Widths up to 3,200 mm, lengths up to 16 m, thickness per needs (3–160 mm)
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Heat Treatments: Normalized or quenched & tempered; post-weld tempering (>30 mm) standard
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Quality Controls:
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Ultrasonic testing (EN 10160 Class S2E)
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Hardness, impact (<–40 °C), hardness tests, hydrogen ≤1.5 ppm
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Certified per ISO 10204 3.1 (TÜV Nord)
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Convenient Packaging: VCI wrap + desiccant ensures 24-month storage integrity
Why Choose Our EN 10083‑3 Plates?
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Optimized for High-Performance Needs – best-in-class strength and fatigue endurance
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Consistent Quality – certified delivery with mill-test data and rigorous NDT
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Flexible Stock & Sizes – from small parts to large forgings, ready to ship
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Proven Global Support – use-grade equivalents worldwide for seamless applications
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Eco-conscious Production – ~85% recycled steel and low CO₂ footprint
Ready to Specify?
Tell us your application—part type, required thickness, performance needs—and we’ll propose the best grade (34/42/51CrV4), heat treatment schedule, and precise quote. Contact us now for samples, datasheets, or pricing tailored to your engineering challenges!