EDM Finish & EDM Surface Technology
Mastering VDI 3400 Surface Comparison & NDT Reference Standards
EDM Surface Roughness Conversion Chart
For precision engineering and EDM surface evaluation, understanding the correlation between VDI 3400, Ra (Roughness Average), and Rmax is essential.
| VDI 3400 Grade | Ra (µm) | Ra (µinch) | Rmax (µm) | EDM Surface Class |
|---|---|---|---|---|
| VDI 12 | 0.40 | 16 | 1.5 | Fine Finish |
| VDI 18 | 0.80 | 32 | 3.1 | Medium Fine |
| VDI 24 | 1.60 | 63 | 6.3 | Medium Texture |
| VDI 30 | 3.15 | 125 | 12.5 | Standard EDM |
| VDI 36 | 6.30 | 250 | 24.0 | Rough Texture |
| VDI 45 | 18.0 | 710 | 70.0 | Extra Rough |
Expert EDM Surface Solutions
EDM Finish (Electrical Discharge Machining) is critical for creating NDT (Non-Destructive Testing) reference standards and test blocks. The importance of EDM surface finish lies in its ability to produce consistent, high-precision cavities and blind holes in hardened tool steel.
NDT & Quality Control Applications
Precise EDM surface texture is vital for ultrasonic and eddy current testing. Our standards ensure that your reference blocks have the exact edm finish required for calibrated NDT inspections.
Standard Compliance:
- VDI 3400 Reference: From VDI 12 to VDI 45 (12-45 grain).
- SPI Finish Standards: Grades A1, A2, A3 (Mirror) to D1, D2, D3 (Textured).
- Global Approval: Trusted for A B C D (VDI) and E F (SPI) plaques.
Precision EDM processing for complex mold surfaces.
CONTACT EDM EXPERTS
Tel: +86 – 769-82566780
Fax: +86 – 769-82566781
Address: Dongguan, China
EMAIL INQUIRY
support@moldtexture.net
sunnykissyou@hotmail.com