Rapidsheetfab | Dongguan, China
Mild / Carbon Steel for Sheet Metal Fabrication
Rapidsheetfab manufactures custom mild / carbon steel sheet metal parts and welded assemblies for industrial OEMs—supporting everything from one-piece prototypes and NPI builds to low-volume repeat and regular production. We focus on engineering-responsive service, controlled quality, and export-ready communication.
If your project needs more than cutting and bending—such as welding, PEM hardware, tapping, finishing, and assembly—we help consolidate processes to reduce supplier count and improve consistency.
Why Mild / Carbon Steel?
Mild (low-carbon) and carbon steel are widely used for industrial equipment because they offer a practical balance of:
Material Advantages
- Strength and rigidity for enclosures, frames, brackets, and bases
- Good weldability for TIG/MIG/MAG and spot welded assemblies
- Cost-effectiveness for prototype-to-production programs
- Broad finishing options such as powder coating, plating, and painting systems (via qualified partners)
Common Steel Types We Process
- SPCC/CRS — cold rolled steel
- Q235 / Q355 — structural carbon steel
- SGCC / SECC — galvanized steel options (application dependent)
Typical Mild/Carbon Steel Parts We Make
We support industrial OEM sheet metal applications such as:
Enclosures, cabinets, and electrical control boxes
Chassis, panels, covers, and doors
Brackets, mounting plates, and structural reinforcements
Frames, bases, and welded sub-assemblies
Multi-part assemblies requiring hardware insertion and tapping
Best-fit programs often start with a prototype build and continue into repeat production.
Mild / Carbon Steel Fabrication Capabilities
Our in-house fabrication processes include:
Cutting & Punching
- Fiber laser cutting — sheet capacity up to 2000 × 4000 mm
- CNC punching — precision holes, louvers, and formed features
- Carbon steel up to 25 mm (material/process dependent)
Forming
- CNC press brakes — up to 230T / 3000 mm
- Common industrial bends, flanges, hems, and formed panels
Welding & Assembly
- MIG/MAG, TIG, laser welding, and spot welding
- Riveting and mechanical assembly support
Hardware & Threads
- PEM hardware insertion
- Tapping M2–M12
Deburr & Cosmetic Prep
- Deburring, grinding, brushing, basic polishing
- Assembly support
Surface Finishing
Arranged through qualified partners:
- Powder coating
- Plating
- Passivation (when applicable)
- Sandblasting
- Screen printing and laser marking
Tolerance & Quality Control
Typical capabilities (part geometry and drawing controls apply):
±0.10 mm
Laser Cutting
±0.20–0.30 mm
Bending
±0.10–0.20 mm
Holes
Quality System & Inspection
- ISO 9001:2015 certified quality management system
- Process flow: IQC → FAI → IPQC → FQC → OQC
- Inspection resources: CMM, 2.5D vision system, height gauges, and standard tools
Available Documentation
- First Article Inspection (FAI)
- Dimensional inspection reports
- Material certificates
- RoHS / REACH documentation (as required)
- Coating/finishing reports (when applicable)
Lead Times & MOQ
- MOQ: 1 piece for prototypes
- Prototype lead time: 3–12 working days (process dependent)
- Small batches: 10–15 days
- Regular production: 15–25 days
We support direct overseas export service and responsive English communication for OEM programs.
Who This Service Fits Best
This mild/carbon steel sheet metal fabrication service is designed for:
Ideal Industries
- Industrial OEMs and equipment manufacturers
- Automation, robotics, and machinery builders
- Electronics/instrument and lab/medical equipment makers
- Energy equipment manufacturers
Key Value Drivers
- Fast RFQ response with engineering review
- DFM feedback before cutting metal
- Stable quality from prototype to production
- Inspection reports and export-ready documentation
- One supplier for cutting + forming + welding + hardware + finishing coordination
Notes on Fit
Lower-priority inquiries include:
- • Price-only requests without drawings
- • Decorative one-off projects with no repeat potential
- • Work dominated by machining or heavy structural steel
If you're unsure, share your files—we'll quickly confirm manufacturability and best process routes.
How to Request a Quote
For the fastest and most accurate quotation, please send:
- 1.Drawings: PDF + DXF, or STEP/SolidWorks
- 2.Material grade and thickness (e.g., SPCC, Q235/Q355, SGCC/SECC)
- 3.Quantity: prototype + planned production volumes
- 4.Finish requirements (powder coat color/texture, plating spec, etc.)
- 5.Welding notes, cosmetic requirements, and critical dimensions
- 6.Hardware details (PEM type, thread sizes, tapping notes)
- 7.Inspection/documentation needs (FAI, dimensional report, certificates)
- 8.Target delivery date and shipping destination
Get Started
Send your drawings and requirements, and we'll respond with:
- DFM feedback (if needed)
- A clear quote with lead time
- Quality and documentation options aligned to your program