EN 10083-3 4135/4140/4142/6150 Alloy Structural Steel Plate

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.
We offer EN 10083-3 4135/4140/4142/6150 Alloy Structural Steel Plate and related grades with 100% factory direct pricing and free quotes available within 6 hours.

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Product Introduction

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)
  • Hardenability: Excellent Jominy depths (~14 mm) comparable to premium steels

  • Fatigue resistance: Up to 650 MPa endurance limit seen in grades like 34CrMo4/42CrMo4


Core Advantages

  1. Exceptional Strength + Toughness – High tensile/yield and surface hardness (up to 62 HRC) post-quenching

  2. Deep Hardenability for Large Parts – >14 mm hardenability enables reliable properties in thick forgings

  3. Wear & Fatigue Resistance – Superior cyclic life (~650 MPa endurance) for powertrain and rotating parts

  4. Machinable & Weldable – Designed for aftermarket machining, with preheat requirements and proven weldability

  5. Global Interchangeability – Recognized equivalents like SAE 4140, SCM440 (42CrMo4), AISI 6150 (51CrV4)


Typical Applications

  • Power Transmission & Heavy Machinery: Forged shafts, hydraulic rams, axle spindles

  • Automotive & Racing: Crankshafts (42CrMo4 up to 62 HRC), axles, leaf springs

  • Spring Manufacturing: 51CrV4/6150 steel coils meeting ISO 6020/2 standards

  • Hydraulics & Construction: Cylinder rods, excavator pins, ram pistons—built to handle high loading cycles


Specifications & Supply

  • Sizes: Widths up to 3,200 mm, lengths up to 16 m, thickness per needs (3–160 mm)

  • Heat Treatments: Normalized or quenched & tempered; post-weld tempering (>30 mm) standard

  • Quality Controls:

    • Ultrasonic testing (EN 10160 Class S2E)

    • Hardness, impact (<–40 °C), hardness tests, hydrogen ≤1.5 ppm

    • Certified per ISO 10204 3.1 (TÜV Nord)

  • Convenient Packaging: VCI wrap + desiccant ensures 24-month storage integrity


Why Choose Our EN 10083‑3 Plates?

  • Optimized for High-Performance Needs – best-in-class strength and fatigue endurance

  • Consistent Quality – certified delivery with mill-test data and rigorous NDT

  • Flexible Stock & Sizes – from small parts to large forgings, ready to ship

  • Proven Global Support – use-grade equivalents worldwide for seamless applications

  • 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!

Luo Kaiwei Steel Company is a multi-ISO certified steel manufacturer specializing in carbon steel plates, pipes and galvanized coils since 2010. Competitive prices and ASTM/JIS compliant. Get instant quotes for bulk orders and global shipping support.

Tel: +86 15635685959

E-mail: [email protected]  

WhatsApp: +86 18912200505

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