Custom Precision CNC Machining Steel 1020 Parts in China
We manufacture custom CNC machining steel 1020 parts in China for global buyers who demand tight tolerances, consistent material traceability, and competitive lead times. From single prototypes to high-volume production runs, every component is machined to your drawing and inspected before shipment.
Understanding AISI 1020 Steel
AISI 1020 is a low-carbon, plain-carbon steel widely selected for machined components that require good ductility, weldability, and case-hardening response.
Why 1020 Steel Is a Common Choice
With a nominal carbon content of 0.18% to 0.23%, 1020 steel sits in the low-carbon range that balances machinability and mechanical performance. It cuts cleanly on CNC lathes and machining centers, produces minimal tool wear, and accepts carburizing to create a hard, wear-resistant surface while retaining a tough core.
For custom CNC machining steel 1020 parts in China, this material is especially suitable for shafts, pins, gears, spindles, bolts, studs, fixtures, and general-purpose structural components. It is also frequently used as a base material that receives secondary operations such as grinding, threading, and surface treatment.
Our workshop processes 1020 steel bar stock, tube, and plate in diameters and thicknesses covering most industrial drawings, and we can source certified raw material from domestic mills when your project requires it.
Typical Chemical & Mechanical Properties
| Carbon (C) | 0.18% – 0.23% |
| Manganese (Mn) | 0.30% – 0.60% |
| Silicon (Si) | 0.10% – 0.35% |
| Phosphorus (P) | Max 0.040% |
| Sulfur (S) | Max 0.050% |
| Tensile Strength (annealed) | Approx. 420 MPa |
| Yield Strength (annealed) | Approx. 295 MPa |
| Elongation | Approx. 25% |
| Hardness (annealed) | Approx. 121 HB |
| Density | 7.85 g/cm³ |
Key Characteristics of 1020 Steel
These properties define how 1020 steel behaves during machining, heat treatment, and end-use service.
Excellent Machinability
Low carbon content produces short, manageable chips and low cutting forces, allowing higher feed rates and longer tool life on both turning and milling operations.
Good Weldability
1020 can be welded by most conventional methods without preheating in typical section sizes, making it suitable for fabricated assemblies and welded sub-components.
Case Hardening Response
Through carburizing or carbonitriding, the surface can reach high hardness for wear resistance while the core remains ductile and impact-tough.
High Ductility & Formability
In the annealed condition, 1020 offers good elongation and cold-forming behavior, supporting bending, drawing, and stamping operations before final machining.
Cost-Effective Raw Material
As a standard plain-carbon grade, 1020 is widely available in bar, tube, and plate form at favorable pricing, which helps control overall part cost.
Versatile Surface Finishing
It accepts black oxide, zinc plating, nickel plating, phosphating, powder coating, and polishing, giving designers broad options for corrosion protection and appearance.
International Grade Equivalents
AISI 1020 is known by different commercial designations under national and international standards. The table below lists the most commonly referenced equivalents for sourcing and drawing cross-reference.
Note: Equivalent grades may have slight differences in chemical analysis or mechanical properties. Always confirm the exact specification against your drawing requirements before production.
CNC Machining Capabilities for 1020 Steel
Our shop floor combines multi-axis CNC equipment with experienced machinists to produce custom CNC machining steel 1020 parts in China across a wide range of geometries and complexities.
CNC Turning
Horizontal and slant-bed lathes produce shafts, sleeves, bushings, and rotational parts with concentric features and fine surface finishes.
CNC Milling
3-axis, 4-axis, and 5-axis machining centers handle prismatic parts, pockets, contours, and complex 3D surfaces in a single setup.
Drilling & Tapping
Precision drilling, reaming, countersinking, and tapping produce holes and threads with accurate position and consistent pitch.
Cylindrical & Surface Grinding
Secondary grinding achieves tight dimensional tolerances and low surface roughness on diameters, faces, and flat surfaces.
Wire EDM
Wire electrical discharge machining cuts intricate profiles, sharp internal corners, and hard-to-reach features with minimal cutting force.
Boring & Internal Machining
Fine boring operations deliver accurate bore diameters, cylindricity, and surface finish for bushings, housings, and valve bodies.
Threading & Knurling
Single-point and whirling threading produce external and internal threads to standard or custom specifications, including knurled grip surfaces.
Broaching & Keyseating
Internal and external broaching creates keyways, splines, and polygonal profiles efficiently in medium- to high-volume production.
Surface Treatment & Heat Treatment Options
Beyond machining, we coordinate a full range of secondary processes to deliver 1020 steel parts ready for assembly.
Carburizing & Quenching
Case hardening raises surface hardness for wear resistance while keeping the core tough, ideal for gears, pins, and shafts.
Black Oxide / Alkaline Blackening
A decorative black finish with mild corrosion protection, commonly used on tooling, fasteners, and mechanical components.
Zinc Plating
Electro-galvanized coating provides effective corrosion protection for fasteners, brackets, and general industrial parts.
Nickel Plating
Electroless or electrolytic nickel improves wear resistance, corrosion protection, and surface appearance for precision components.
Phosphating
Manganese or zinc phosphate coating serves as a paint base and lubricant carrier for parts that undergo subsequent coating or cold working.
Powder Coating & Painting
Custom color powder coating or wet painting delivers a durable, decorative finish for exposed structural and housing components.
Tolerances & Surface Finish
Consistent precision is built into every production run. Below are the typical capability ranges we hold for custom CNC machining steel 1020 parts in China.
Dimensional Tolerance Capability
| CNC Turning (diameter) | ±0.01 mm |
| CNC Milling (linear) | ±0.02 mm |
| Cylindrical Grinding | ±0.005 mm |
| Surface Grinding (flatness) | ±0.003 mm / 100 mm |
| Hole Position (drilling) | ±0.02 mm |
| Fine Boring (diameter) | ±0.005 mm |
| Thread Pitch (standard) | 6H / 6g |
Surface Finish Reference
| As-Machined (turning / milling) | Ra 1.6 – Ra 3.2 µm |
| Fine Machining | Ra 0.8 µm |
| Ground Surface | Ra 0.4 µm |
| Polished Surface | Ra 0.1 – Ra 0.2 µm |
| Bead Blasted | Ra 1.6 – Ra 3.2 µm |
| Black Oxide | Matte black, Ra unchanged |
| Zinc / Nickel Plated | Smooth, Ra 0.8 – Ra 1.6 µm |
Typical Applications of Machined 1020 Steel Parts
The balance of machinability, cost, and mechanical performance makes 1020 steel suitable for components across many industries.
Shafts & Spindles
Drive shafts, transmission shafts, and rotating spindles requiring good surface hardness after carburizing.
Gears & Sprockets
Light- to medium-duty gears, pinions, and sprockets that benefit from case hardening for tooth wear resistance.
Pins, Bolts & Studs
Fasteners and locating pins where moderate strength and good formability are required.
Bushings & Sleeves
Cylindrical bearing surfaces and spacer sleeves machined to close diametral tolerances.
Fixtures & Jigs
Workholding fixtures, locating blocks, and jig components for manufacturing and assembly lines.
Housings & Brackets
Structural housings, mounting brackets, and support components for industrial equipment.
Valve & Pump Components
Valve bodies, stems, and pump parts requiring precision machining and good surface finish.
Automotive & Agricultural Parts
Linkages, levers, and mechanical components used in vehicles, farm machinery, and off-highway equipment.
Related Machined Products
A selection of components we regularly produce in 1020 steel and similar carbon steel grades.
Why Buyers Choose Us for 1020 Steel Machining
We focus on delivering consistent quality, transparent communication, and reliable lead times for every order of custom CNC machining steel 1020 parts in China.
In-Process Quality Control
First-article inspection, in-process dimensional checks, and final inspection with calibrated measuring equipment ensure every batch meets drawing specifications.
Flexible Production Volumes
From one-off prototypes and small batches to serial production of thousands of pieces, we scale production to match your project stage.
Reliable Lead Times
Standard orders typically ship within 15 to 25 working days, with expedited options available for urgent prototype requirements.
Material Traceability
Raw material is sourced from established domestic mills, and mill test reports can be provided when specified in your purchase order.
Engineering Support
Our engineering team reviews drawings for manufacturability, suggests cost-saving changes, and confirms tolerances before cutting metal.
Competitive Pricing
Efficient production planning and local material sourcing allow us to offer competitive unit prices without compromising machining quality.
Our Production Workflow
A structured process keeps your order on track from drawing review to final shipment.
Drawing Review & Quotation
We analyze your 2D drawings and 3D models, confirm material, tolerances, and quantity, then return a detailed quotation.
Material Preparation
Bar stock, tube, or plate is cut to size and verified against the required grade before entering the machining queue.
CNC Machining
Parts are machined on turning and milling equipment according to approved process sheets, with in-process inspection at key operations.
Secondary Operations
Grinding, heat treatment, surface treatment, and marking are completed by qualified partner processes under our coordination.
Final Inspection
Finished parts undergo dimensional and visual inspection, and measurement records are prepared for shipment when required.
Packing & Shipment
Parts are cleaned, protected against corrosion, and packed in export-ready cartons or crates before dispatch by your chosen freight method.
Start Your 1020 Steel Machining Project
Whether you need a single prototype or a recurring production program, we are equipped to manufacture custom CNC machining steel 1020 parts in China to your exact specifications. Send us your drawings and requirements, and our engineering team will review them and provide a quotation tailored to your project.