55Si7 (Silicon Spring Steel) — EngMats Datasheet
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Engineering Materials Database
Spring Steels
55Si7 (Silicon Spring Steel)
Spring Steel
55Si7 -- standard Si spring steel. Rm 1200-1600 MPa in service. The classic flat spring steel for automotive leaf springs, disc springs and flat spring elements.
EngMats · Engineering Materials Database · All data for reference only — verify against standards
18.08.2026