| Chemical Analysis | |
|---|---|
| C% | Carbon 0.56 – 0.64 |
| Mn% | Manganese 0.75 – 1.00 |
| P% | Phosphorus 0.035 max |
| S% | Sulfur 0.040 max |
| Si% | Silicon 1.8 – 2.2 |
General characteristics of Alloy Steel 9260
Alloy steel 9260 is a high-silicon grade especially designed for its spring properties.
Applications
Leaf and truncated conical springs for automotive and general engineering
Forging
A recommendation for general applications is 1925 – 1560ºF (1050-850ºC) and for springs 1650 – 1560ºF (900 – 850ºC.) Parts should be slow cooled after forging or transferred to an equalization treatment.
Heat treatment
Annealing: To produce a structure of coarse to fine spheroidite, parts should be austenitized at 1400ºF (760ºC) and cooled to 1300ºF (705º) at a rate of 10ºF/hr., or alternately cooled to 1225ºF (660ºC) and held for 10 hours as an iso-anneal.
Normalizing: 1650ºF (900ºC) and air cool. This will be an important treatment for this grade.
Hardening: Austenitize at 1525-1580ºF (830-860ºC) and water quench.
Tempering: 880-970ºF (470-520ºC)
Machinability: Parts could be machined following a spheroidize anneal
Weldability: The grade would not normally be welded.
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