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Sourcing flat steel circles in the exact diameter and thickness you need — without ordering custom blanks or cutting down sheet stock yourself — is a frustrating bottleneck for fabricators, welders, artists, and DIY builders. Whether you're making end caps, base plates, decorative medallions, or structural flanges, you need Q235/A3 mild steel round discs that arrive flat, clean-edged, and ready to work with.
These laser cut mild steel discs are produced from Q235/A3 low-carbon structural steel — a widely used grade equivalent to ASTM A36 in mechanical properties. Each disc is laser cut for a clean, burr-minimized edge profile. Diameters range from 50 mm (~1.97 in) to 350 mm (~13.78 in), and thickness options span 0.6 mm (~0.024 in) through 20 mm (~0.787 in), covering thin sheet blanks through solid plate circles. Pack quantities are scaled to diameter and thickness to keep orders practical.
Common applications include welded base plates and column end caps for structural steel projects, circular backing plates for pipe flanges and pressure vessel covers, decorative steel circles for garden art, signage, and metalwork crafts, and laser-cut blanks for CNC plasma or further machining into gears, pulleys, and custom round parts. The Q235 mild steel disc format is also widely used for DIY fire pit rings, table bases, and furniture legs in maker and workshop settings.
| Material | Q235/A3 Low-Carbon Mild Steel (equivalent to ASTM A36) |
|---|---|
| Cut Method | CNC Laser Cut |
| Diameter Range | 50 mm – 350 mm (1.97 in – 13.78 in) |
| Thickness Range | 0.6 mm – 20 mm (0.024 in – 0.787 in) |
| Surface Finish | Mill scale, flat |
| Tensile Strength | Typically 370–500 MPa |
| Yield Strength | Typically ≥235 MPa |
| Elongation | Typically ≥26% (thin gauge) to ≥22% (thick plate) |
| Carbon Content | Typically ≤0.22% |
| Weldability | Excellent — suitable for MIG, TIG, and stick welding |
| Corrosion Resistance | Low — rust protection recommended for outdoor use |
| Pack Quantity | See variant options |
| Tolerance | See variant options |
Match the diameter to your required circle size — common uses include 50–100 mm for small hardware blanks and end caps, 150–200 mm for table bases and pipe flanges, and 250–350 mm for large structural base plates or decorative panels. For thickness, 0.6–2 mm suits decorative and sheet-metal work; 3–6 mm covers medium structural brackets and flanges; 8–20 mm is appropriate for load-bearing bases, heavy flanges, and thick plate applications.
Yes. Q235/A3 is a structural-grade low-carbon steel with a yield strength of ≥235 MPa and tensile strength of 370–500 MPa, making it suitable for general structural fabrication, base plates, brackets, and support frames. For high-stress or load-critical applications, consult an engineer to confirm the appropriate thickness and grade for your specific load requirements.
Q235 mild steel will oxidize when exposed to moisture or outdoor conditions. For indoor dry use, the mill-scale surface provides some short-term protection. For outdoor, humid, or marine environments, apply a rust-inhibiting primer followed by a topcoat, or use powder coating, galvanizing, or a clear lacquer depending on your application. Applying protection promptly after any cutting or grinding is recommended.
Yes. Q235/A3 mild steel has excellent weldability and is compatible with MIG, TIG, and stick (SMAW) welding processes using standard mild steel filler wire or electrodes. For best results, clean the weld area of mill scale, oil, or surface oxidation before welding. No preheat is typically required for thicknesses under 25 mm in normal ambient conditions.
Laser cutting produces a cleaner edge than shearing or plasma cutting, with minimal burr. However, cut metal edges can still be sharp, especially on thinner gauges. We recommend wearing gloves when handling, and lightly deburring or chamfering edges with a file or angle grinder if the application requires a smooth or safe-to-touch finish.
Absolutely. The consistent circular profile and flat surface make these discs well-suited for decorative applications such as garden art, wall hangings, fire pit rings, table bases, and custom signage. Thinner gauges (0.6–2 mm) are easier to cut, bend, or drill for decorative work, while thicker discs (3 mm+) provide a more substantial, industrial aesthetic for furniture and structural art pieces.
Q235 is the current Chinese national standard designation for this low-carbon structural steel grade, while A3 is the older designation used under a previous standard. They refer to the same material family with essentially equivalent mechanical properties and chemical composition. Both terms are commonly used interchangeably in the market, and this product meets the Q235/A3 specification.
