Spring steel
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Spring steel is a low alloy, medium carbon steel or high carbon steel with a very high yield strength. This allows objects made of spring steel to return to their original shape despite significant bending or twisting.
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[edit] Grades
Silicon is the key component to most spring steel alloys. The most widely used spring steel is ASTM A228 (0.80–0.95% carbon), which is also known as music wire.[1]
| SAE grade (ASTM grade) | Composition | Yield strength | Typical hardness [HRC] | Maximum hardness [HRC] | Comments |
|---|---|---|---|---|---|
| 1074/1075[2] | 44–50[3] | 50 | Scaleless blue steel | ||
| 1095 (A684)[2] | 60–75 ksi (413-517 MPa) | 48–51[3] | 59 | Blue spring steel | |
| 5160 (A689)[4] | 97 ksi (669 MPa) | 63 | Chrome-silicon spring steel; fatigue-resistant | ||
| 9255 | 1.50-1.80% Si, 0.70-1.00% Mn and 0.52-0.60% C | ||||
| 301 Spring-tempered stainless steel (A666)[5] | 147 ksi (1014 MPa) | 42 |
[edit] Applications
Spring steel is also commonly used in the manufacture of metal swords used for stage combat due to its resistance to snapping or shattering. Spring steel is one of the most popular materials used in the fabrication of lockpicks due to its pliability and resilience. Applications include piano wire, spring clamps, and springs.
[edit] See also
[edit] References
- ^ Oberg et al. 2000, p. 286.
- ^ a b McMaster-Carr catalog (116th ed.), McMaster-Carr, p. 3630, http://www.mcmaster.com/#catalog/116/3630, retrieved 2010-09-03.
- ^ a b http://www.admiralsteel.com/pdf/catalog.pdf
- ^ McMaster-Carr catalog (116th ed.), McMaster-Carr, p. 3632, http://www.mcmaster.com/#catalog/116/3632, retrieved 2010-09-03.
- ^ McMaster-Carr catalog (116th ed.), McMaster-Carr, p. 3662, http://www.mcmaster.com/#catalog/116/3662, retrieved 2010-09-03.
[edit] Bibliography
- Oberg, Erik; Franklin D. Jones, Holbrook L. Horton, and Henry H. Ryffel (2000). Christopher J. McCauley, Riccardo Heald, and Muhammed Iqbal Hussain. ed. Machinery's Handbook (26th edition ed.). New York: Industrial Press Inc. ISBN 0-8311-2635-3.
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