Blog

I. Basic Understanding of Shear Strength

Shear strength can be regarded as the material’s critical toughness threshold, defining the maximum load silicon steel sheets can withstand under shear force. This indicator directly governs the yield rate of stamping forming and cutting processes:

• Grain orientation: The smaller the angle between grain alignment and the direction of shear force, the higher the shear strength.
• Carbon content: Every 0.1% rise in carbon content increases shear strength by approximately 15–20 MPa.
• Temperature effect: When ambient temperature exceeds 150°C, shear strength drops by roughly 3% per 10°C temperature increment.

II. Guide to Key Selection Parameters

Selecting silicon steel sheets is analogous to choosing armor, which needs both protective capacity and workability:

• Thickness matching: Sheets of 0.5 mm thickness deliver 30–40% lower shear resistance per unit area than 1.0 mm sheets.
• Grade comparison: Non-oriented silicon steel (e.g. 50W600) boasts an average shear strength 12% higher than grain-oriented silicon steel (e.g. 30Q130).
• Surface treatment: Sheets coated with insulating film exhibit a 5–8% reduction in shear strength compared to uncoated blanks.

III. Lesser-Known Tips for Application and Maintenance

These details help silicon steel sheets maintain stable performance long-term:

• Storage restriction: Stack heights over 1 meter degrade the shear performance of bottom sheets.
• Processing tip: Laser cutting retains 15% more shear strength than mechanical blanking and shearing.
• Performance warning sign: Minor edge microcracks indicate shear strength has fallen below 70% of the original value.