65Mn Spring Steel Sheet Plate 0.5mm–5mm Flat Metal Stock for Shims, Springs & Tooling

For light-duty shims and spacers, 0.5mm–1mm is generally sufficient. For spring clips, flexible blades, or parts that need to hold a set shape under load, 1.5mm–3mm is typically the right range. For structural tooling inserts or wear plates, 4mm–5mm is commonly used. When in doubt, go one step thicker — you can always grind down, but you can't add material back.

65Mn is a high-carbon manganese spring steel alloy known for its excellent elasticity, hardness, and fatigue resistance. Unlike stainless steel, 65Mn is not corrosion-resistant on its own, but it offers superior spring-back properties and toughness under repeated flexing. It is generally used where stainless steel would be too soft or too brittle for the application.

65Mn spring steel will oxidize if left unprotected in humid or wet conditions. For outdoor use, it is generally recommended to apply a rust-inhibiting coating, oil film, or paint after cutting and fitting. If corrosion resistance is a primary requirement, a stainless steel shim stock may be a better fit for your application.

Yes. Thinner gauges (0.5mm–1mm) can typically be cut with heavy-duty metal shears or a rotary tool. Thicker gauges (2mm–5mm) generally require an angle grinder, metal-cutting bandsaw, or waterjet. Drilling is possible with HSS or cobalt drill bits and cutting fluid. Bending is feasible, but 65Mn work-hardens quickly — tight-radius bends may require annealing first to avoid cracking.

Width is 100mm (≈3.94") across all variants. Length is either 100mm (≈3.94") or 200mm (≈7.87") depending on the variant selected. Thickness ranges from 0.5mm to 5mm. Please select your preferred combination from the variant options above before adding to cart.

The piece count per order varies by thickness and length combination — ranging from 1 piece (for thicker or longer cuts) up to 10 pieces (for the thinnest 100mm option). The exact quantity is shown in the "Length & Amount" variant selector above before you add to cart.

Yes. 65Mn spring steel sheet is commonly used for shim stock and precision spacer applications in machine shops and repair work. The consistent thickness and flat surface make it well-suited for shimming bearings, aligning machinery, and filling gaps in mechanical assemblies. For very tight tolerances, verify the actual thickness with a micrometer upon receipt.