Tape, strip, sheet 55s2a - 55Si7 - 1.5026
Structural steel spring-spring. To achieve higher performance characteristics, steels alloyed with silicon, chromium and vanadium are used. A characteristic feature of such steels is the presence of carbon in them from 0.5% to 0.8%. These steels have a high yield strength, which provides high elastic properties. This is achieved by quenching, followed by an average vacation.
Percent composition, EN 10132−4-2000
|0.52 — 0.6||1.6 — 2||0.6 — 0.9||≤0.4||≤0.025||≤0.025||≤0.4||≤0.1|
The limit of short-term strength, MPa (temperature 20 ° C)
- Rm (+ A) = 740 Nominal thickness 0.3 — 3 mm:
- Rm (+ QT) = 1200−1700. Nominal thickness 0.3 — 3 mm:
Limit of proportionality (yield strength for permanent deformation)
- Rp0.2 0.2% (+ A) = 600. Nominal thickness 0.3 — 3 mm:
- HV (+ A) = 230
- HV (+ QT) = 370−520
- HB: (+ S) = 280
- HB: (+ A) = 240
- HB (+ AC) = 230
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