20CrV
Alloy Steel20CrV
(GB/T 3077). Nominal values—confirm mill certificate.
Chemical Composition (%)
| C | 0.17 |
|---|---|
| SI | 0.17 |
| MN | 0.5 |
| CR | 0.8 |
| V | 0.1 |
| P | 0.035 |
| S | 0.035 |
Mechanical Properties
Tensile:≥835 MPa;Yield:≥640 MPa;Elong:≥12%;RA:≥45%
Chinese Standard
T 3077 20CrV
Available Forms
Bar,Plate
Uses
Carburizing (case-hardening) steel with low carbon core for toughness and a hard, wear-resistant surface after carburizing. Used for gears, camshafts, pinions, spline shafts, bushings and transmission parts subjected to fatigue and surface wear.
Heat Treatment
Typically normalized (880–920 °C, air cool) or carburized (900–930 °C) for case-hardening grades, then quenched and tempered at 150–200 °C. Carburize 900–930 °C, direct/intake quench, temper 150–200 °C; useful case depth 0.5–1.5 mm.
Precautions
Weldable with standard procedures; preheat may be needed for thick sections or higher-carbon/ alloy grades. Protect from decarburization during heating (controlled atmosphere or protective coating). Machine the core stock before surface hardening; leave grinding allowance for the hardened case.
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