Alloy Steel 17Cr3 Round Bar 17Cr3 Bars 17Cr3 Rods

Product Description

17Cr3 (Material Number: 1.7016) is a classic European case-hardening (carburizing) alloy steel designed for light-to-medium stressed components that require a highly wear-resistant surface combined with a ductile, shock-absorbing core.

Compared to the 20MnCr5 grade we previously looked at, 17Cr3 features lower manganese and slightly lower carbon, making it highly economical and exceptionally easy to forge and machine, though it is typically used for parts with smaller cross-sections.

Here is the complete technical profile for 17Cr3 alloy bars, round bars, and rods:

⚙️ Chemical Composition (%)

The chemistry of 17Cr3 relies on a modest, precise addition of chromium to improve hardenability and grain refinement during the case-hardening process.

* Note: For optimized high-speed machining on CNC lines, a controlled sulfur variant (17CrS3 / 1.7014) is often supplied with a sulfur content between 0.020% and 0.040%.

🌍 International Equivalents & Cross-References

• Werkstoff Number: 1.7016 (Standard) / 1.7014 (Free-machining S variant)

• EN / DIN Standard: 17Cr3 / 17CrS3 (EN 10084)

• SAE / AISI (USA): AISI 5015 (Closest chemical match)

• AFNOR (France): 18C3

• JIS (Japan): ~SCr415

💪 Mechanical Properties (Typical Core Values after Heat Treatment)

After the component is machined, carburized (surface infused with carbon), quenched, and low-temperature tempered, it yields the following core properties:

• Core Tensile Strength ($R_m$): $700 - 1000 \text{ MPa}$ (depending on bar diameter)

• Core Yield Strength ($R_e$): $\ge 490 - 540 \text{ MPa}$

• Elongation ($A_5$): $\ge 11\%$

• Typical Surface Hardness: 58–62 HRC (Rockwell C), providing great resistance to abrasive wear and adhesive scuffing.

🛠️ Typical Applications

Because 17Cr3 provides a tough core and an extremely hard skin at a cost-effective price point, it is favored for smaller components, light vehicle parts, and standard mechanical hardware:

• Automotive & Consumer Goods: Small gears, steering knuckles, selector shafts, pins, bushings, and universal joints.

• General Engineering: Light-duty drive shafts, dowel pins, guide pillars, and link pins.

• Fasteners & Hardware: Specialized clamping rods, pivoting pins, and high-wear levers.

📐 Processing & Delivery States

• Supply Profiles: Available as hot-rolled, centerless ground, cold-drawn, or turned bright round bars.

• Machinability: In its soft-annealed (+A) or treated for shearability (+S) conditions, 17Cr3 displays excellent machinability with low tool wear, cleaner chip formation, and a high-quality surface finish prior to case hardening.

• Heat Treatment Tip: Carburizing is typically carried out at $880^\circ\text{C} - 980^\circ\text{C}$, followed by a direct or delayed quench in oil or polymer, and a mandatory temper at $150^\circ\text{C} - 200^\circ\text{C}$ to relieve internal stresses without sacrificing surface hardness.