17CrNiMo6 Alloy Steel Bars / 17CrNiMo6 Rods / 17CrNiMo6 Round Bar / 17CrNiMo6 Rings

Product Description

17CrNiMo6 (Material Number 1.6587) is a high-grade, case-hardening (carburizing) alloy steel widely used in European heavy engineering. It is known for its excellent core toughness and high surface hardness after heat treatment, making it the "gold standard" for high-load gear manufacturing.

1. Technical Specifications

This steel is often referred to by its DIN designation or the modern EN equivalent:

• Standard: EN 10084

• Material Number: 1.6587

• Equivalent Grades: * DIN: 17CrNiMo6

  • ISO: 18CrNiMo7-6

  • AISI/SAE: 4820 (Approximate only; 17CrNiMo6 has higher Chromium and Molybdenum)

2. Chemical Composition (%)

The combination of Chromium, Nickel, and Molybdenum provides a deep-hardening capacity and excellent fatigue strength.

3. Mechanical & Performance Profiles

The primary advantage of 17CrNiMo6 is its performance after carburizing (case hardening):

• Surface Hardness: Typically 58“62 HRC.

• Core Strength: High tensile strength (up to 1200 MPa depending on section size) while maintaining high impact energy.

• Wear Resistance: Exceptional, specifically designed for metal-on-metal rolling contact.

• Hardenability: Excellent through-hardenability in large sections (rods and rings up to 500mm+).

4. Available Forms & Processing

• Round Bars / Rods: Usually supplied in the Annealed (+A) or Treated for Shearability (+S) condition to allow for CNC machining before final hardening.

• Forged Rings: Often used for large industrial gear rims and bearing races. These are typically hot-forged and then normalized to ensure a uniform grain structure.

• Surface Finish: Can be supplied as Black (hot rolled/forged), Peeled, or Ground for precision applications.

5. Key Applications

Because of its ability to withstand extreme torque and shock loads, you will find 17CrNiMo6 in:

• Heavy-Duty Gearing: Wind turbine gearboxes, mining equipment, and locomotive gears.

• Automotive: Crankshafts, steering components, and high-stress transmission shafts.

• Aerospace: High-load structural pins and actuator components.

• Mechanical Engineering: Highly stressed bolts and bushings.