65MN Spring Steel Plate Speciality Metals Quality Flat Sheet Thickness：0.1mm-2mm

For shim stock and fine gap-filling applications, thicknesses of 0.1mm–0.3mm are typical. For light flat springs and wear strips, 0.4mm–0.7mm works well. For heavier leaf spring blanks or structural spring elements, 0.8mm–2mm is the appropriate range. If you are unsure, start with a thinner gauge — it is easier to stack shims than to thin a sheet.

No. 65Mn is a high-carbon manganese spring steel, not a stainless steel. It does not contain significant chromium content and will develop surface oxidation if left unprotected in humid environments. For outdoor or corrosive applications, apply a protective coating, oil film, or consider a stainless alternative. For indoor mechanical and fabrication use, 65Mn is an excellent choice for its spring properties.

Thinner gauges (0.1mm–0.5mm) can be cut with quality tin snips or bench shears. Thicker gauges (0.6mm–2mm) are best cut with an angle grinder fitted with a thin cutting disc, a cold saw, or CNC laser/waterjet equipment for precision edges. Avoid using heat cutting methods that could alter the temper of the steel near the cut line.

65Mn spring steel is susceptible to surface rust if exposed to moisture without protection. For storage and use, keep sheets lightly oiled or apply a rust-inhibiting coating. For applications requiring corrosion resistance, a zinc plating, powder coat, or clear lacquer finish can be applied after cutting to shape.

Yes. 65Mn spring steel responds well to hardening and tempering. Typical heat treatment involves heating to approximately 800–830°C, quenching in oil, then tempering at 400–500°C to achieve the desired balance of hardness and toughness. Always consult a materials reference or metallurgist for specific heat treatment parameters for your application.

Both options ship the same sheet dimensions — the only difference is quantity. The 1Pcs option is ideal for prototyping or single-use applications. The 2Pcs option provides a spare or allows you to cut two different profiles from the same size sheet, and is priced at a slight saving per piece compared to buying two 1Pcs orders separately.

The thinnest variants (0.1mm–0.2mm) are suitable for light clock spring and mainspring applications in hobby clockmaking and mechanical projects. For precision horological work, verify the exact thickness tolerance required by your design, as spring performance is sensitive to dimensional variation at these gauges.