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Variety of steel From Wikipedia, the free encyclopedia
Spring steel is a name given to a wide range of steels[1] used in the manufacture of different products, including swords, saw blades, springs and many more. These steels are generally low-alloy manganese, 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 deflection or twisting.
Many grades of steel can be hardened and tempered to increase elasticity and resist deformation; however, some steels are inherently more elastic than others:
SAE grade (ASTM grade) |
Composition | Yield strength | Hardness (HRC) | Comments | |
---|---|---|---|---|---|
Typical | Maximum | ||||
1070 | 0.65-0.75% C, 0.60-0.90% Mn, max .050% S, max .040% P | Normally supplied annealed | 165vpn | 180vpn | CS70, CK67, C70E |
1074/1075[2] | 0.70–0.80% C, 0.50–0.80% Mn, max. 0.030% P, max. 0.035% S[3] | 62–78 ksi (430–540 MPa)[4] | 44–50[5] | 50 | Scaleless blue, or Polished Bright |
1080 (A228) | 0.7–1.0% C, 0.2–0.6% Mn, 0.1–0.3% Si[6] | Piano wire, music wire, springs, clutch discs | |||
1095 (A684)[2] | 0.90–1.03% C, 0.30–0.50% Mn, max. 0.030% P, max. 0.035% S[7] | 60–75 ksi (410–520 MPa), annealed | 48–51[5] | 59 | Blue, or polished bright spring steel |
5160 (A689)[8] | 0.55–0.65% C, 0.75–1.00% Mn, 0.70–0.90% Cr[9] | 97 ksi (670 MPa) | 63 | Chrome-silicon spring steel; fatigue-resistant | |
50CrV4 (EN 10277) | 0.47–0.55% C, max. 1.10% Mn, 0.90–1.20% Cr, 0.10–0.20% V, max. 0.40% Si | 170 ksi (1,200 MPa) | Old British 735 H1steel, SAE 6150, 735A51 | ||
9255 | 0.50–0.60% C, 0.70–0.95% Mn, 1.80–2.20% Si[9] | ||||
301 spring-tempered stainless steel[10] |
0.08–0.15% C, max. 2.00% Mn, 16.00–18.00% Cr, 6.00–8.00% Ni[9] | 147 ksi (1,010 MPa) | 42 | Equivalents EN 10088-2 1.4310, X10CrNi18-8 |
This section needs additional citations for verification. (March 2009) |
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