VT machining offers CNC Milling for SGCC Steel (JIS G3302 hot-dip galvanised), typically supplied cold-rolled, HDG coated. Thicker hot-dip zinc than SECC for outdoor corrosion protection.
CNC Milling Notes for SGCC Steel
SGCC Steel mills well with conventional strategies; finishing passes are planned to meet flatness and finish callouts.
For estimating, a 100 × 100 × 10 mm block of SGCC Steel weighs about 0.79 kg.
Starting Parameters for CNC Milling SGCC Steel
| Cutting speed (carbide) | 135-235 m/min |
|---|---|
| Feed per tooth | 0.035-0.123 mm |
| Spindle speed, Ø10 mm end mill | 4300-7480 rpm |
| Insert / tool class | ISO P — CVD-coated carbide |
| Coolant | Emulsion (5-8%); dry is possible for interrupted cuts |
| Thermal growth, 100 mm part, +10 °C | 11.7 µm (CTE 11.7 µm/m·K) |
Starting values for SGCC Steel, Cold-rolled, HDG coated; optimised on the first article.
SGCC Steel Data Relevant to CNC Milling
| Equivalent designations | JIS G3302 hot-dip galvanised |
|---|---|
| Key composition | Low-carbon base + hot-dip zinc |
| Typical supply condition | Cold-rolled, HDG coated |
| Hardness (typical) | ~50-65 HRB |
| Machinability rating | 55% (AISI B1112 = 100%) |
Typical values; we work to your drawing and mill certificate.
How SGCC Steel Differs
Thicker hot-dip zinc than SECC for outdoor corrosion protection.
Typical applications: Outdoor cabinets, HVAC, roofing parts.
SGCC Steel vs Similar Grades
| SGCC Steel | SECC Steel | SPCC Steel | Q345 Steel | |
|---|---|---|---|---|
| Key composition | Low-carbon base + hot-dip zinc | SPCC base + electro-zinc | C ≤0.15% | C ≤0.20%, Mn ≤1.7% |
| Hardness | ~50-65 HRB | ~50-65 HRB | ~50-65 HRB | ~150 HB |
| Tensile (MPa) | ≥270 | ≥270 | ≥270 | 470-630 |
| Machinability % | 55 | 55 | 55 | 65 |
| Typical use | Outdoor cabinets, HVAC, roofing parts | Computer chassis, electrical cabinets | Sheet-metal enclosures, brackets, panels | Bridges, machine bases, pressure parts |
More on CNC Milling Steel
Finishing options, quality documentation and general cnc milling guidance for all steel grades are on our CNC Milling Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Milling SGCC Steel
Send a STEP/IGES model or PDF drawing, confirm SGCC Steel and its condition (we usually see it supplied cold-rolled, HDG coated), the quantity, critical tolerances and any finish or certificate requirements.
SGCC Steel in Other Processes
Related
Send the drawing, the SGCC Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
What is CNC Milling SGCC Steel and how is it done?
CNC Milling SGCC Steel refers to multi-axis milling cutters remove material to produce prismatic features, pockets, slots and contoured 3D surfaces. Applied to SGCC Steel — strong, economical and widely available — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.
Which industries use CNC Milling SGCC Steel parts?
CNC Milling SGCC Steel parts are used across aerospace, medical, automotive, electronics, semiconductor and general industrial sectors — anywhere precise SGCC Steel components are required.
Does CNC Milling SGCC Steel require dedicated tooling?
Most SGCC Steel machining work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
What is the typical lead time and minimum order for CNC Milling SGCC Steel?
CNC Milling prototypes for SGCC Steel can be produced quickly and scaled to series production. Send your drawing and quantity and we will advise lead time and any minimum order.