AISI 9310 alloy steel is a low carbon nickel-chromium-molybdenum case-hardening steel with excellent strength, toughness, and fatigue resistance. It exhibits high hardenability, allowing for a hard, wear-resistant surface combined with a tough, ductile core, making it well-suited for applications subjected to repeated stress and contact loading.
Due to its case-hardening characteristics, 9310 is commonly used in components requiring high surface durability and long service life, particularly in applications involving rolling or sliding contact. It performs well in gears, pinions, shafts, and other power transmission components where resistance to wear, fatigue, and impact is critical. Its ability to maintain core strength while providing a hardened exterior makes it a reliable choice for demanding mechanical applications requiring both durability and performance.
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AISI 9310 Chemical Composition
Chemical Composition (wt%) limits of AISI 9310*
| Carbon | 0.08-0.13 | Nickel | 3.0-3.5 |
| Manganese | 0.45-0.65 | Molybdenum | 0.08-0.15 |
| Silicon | 0.20-0.35 | Phosphorus | 0.025 |
| Chromium | 1.0-1.4 | Sulfur | 0.025 |
*Maximum, unless range is indicated
AISI 9310 Physical Properties
| Density, lb/in3 | 0.284 |
| Modulus of Elasticity, psi | 29 x 106 |
| Coefficient of Thermal Expansion, 68-212˚F, /˚F | 6.83 x 10-6 |
| Thermal Conductivity, Btu/ft hr ˚F | 30.0 |
| Specific Heat, Btu/lb ˚F | 0.114 |
| Electrical Resistivity, Microhm-in | 6.42 |
AISI 9310 Standards
| AMS 6265 |
| AMS 6267 |
Your Source for AISI 9310 Alloy Steel
At Double Eagle Alloys, we supply 9310 alloy steel in long bar and header plugs engineered for these demanding services. Contact our team to learn how 9310 alloy steel can support long-term performance and reliability.
Questions? We’d love to help. Contact us today to discuss your needs or to check current availability.
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Data shown are typical and provided for informational purposes only. Values should not be considered minimums or maximums for specification or final design. Actual product data may vary, and information may be revised without notice.