9310
Alloy Steel9310
(AISI/SAE). Nominal values—confirm mill certificate.
Chemical Composition (%)
| C | 0.08 |
|---|---|
| MN | 0.45 |
| SI | 0.15 |
| NI | 3 |
| CR | 1 |
| MO | 0.08 |
| P | 0.025 |
| S | 0.025 |
Mechanical Properties
Tensile(case):≥1080 MPa;Core Hardness:30-45 HRC;Case Hardness:≥60 HRC
Equivalent Grades
SAE 9310
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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