15 years one-stop China custom CNC machining parts factory
VMT custom precision iron CNC-machined parts—get an instant quote today. Rapid prototyping of iron machined components within 3–5 days at competitive prices. ISO 9001 and IATF 16949 certified.
Precision iron parts with tolerances up to ±0.005 mm
40+ materials and surface finishing，with material testing reports provided.
24-hour prototyping support with 1-to-1 engineering assistance and fast DFM analysis
12-step quality inspection process with 100% inspection of critical dimensions
ISO 9001, IATF 16949, and RoHS certified
16 yearsMachining Experience
2 HoursQuick Quote
0 PcsMinimum Order Qualities
98%Yield
Home / Resources / Material / Iron CNC Machining /
Accelerate Product Development and Production with On-Demand Custom Iron CNC Machining Services
If you are looking for precision iron parts or rapid prototyping solutions, you’ve come to the right place. From structural components, housings, brackets, shafts, and machine parts to complex industrial assemblies, we deliver reliable prototype and production solutions tailored to your requirements.
VMT has extensive experience working with OEMs and aftermarket manufacturers, supporting new iron component development from concept to mass production. With advanced CNC milling, turning, sheet metal fabrication, and casting plus secondary machining, we ensure every part meets strict specifications. We also offer multiple iron and steel grades to achieve the required strength, durability, and cost efficiency for demanding applications.
Custom Prototypes and High-Volume Iron CNC Machining Parts Manufacturing
24/7 CNC Machining Facility with Samples Ready in 7-10 Days
We are a specialized team focused on custom prototype and batch iron CNC machining, combining engineering expertise, advanced equipment, and process discipline to deliver reliable, scalable parts—fast.
We provide end-to-end custom iron CNC machining services, from rapid prototyping to low- and mid-volume production. Our capabilities cover milling, turning, drilling, tapping, and secondary finishing, with strict quality control at every stage.
Whether you need a functional prototype, pilot run, or stable batch production, we help you reduce risk, control cost, and meet deadlines—delivering iron CNC machined parts that are ready to assemble and perform in real-world applications.
Custom Iron CNC Machined Parts Manufacturing Process
Advanced iron CNC manufacturing combines optimized tooling, precision milling and turning, strict process control, and in-process inspection to deliver consistent tolerances, high strength, and scalable quality from prototype to production.
CNC Turn-Mill Combination Machining
Electrical Discharge Machining
Sheet Metal Fabrication
Die Casting
Iron CNC Machined Parts Material
We machine a wide range of bronze alloys, including phosphor bronze, aluminum bronze, and tin bronze, offering excellent wear resistance, corrosion performance, and strength for precision CNC machined parts across industrial and mechanical applications.
Advantages: Excellent mechanical performance, high precision, and high repeatability.
Disadvantages: More limited geometric capabilities compared to 3D printing.
Available Iron at VMT: Gray Iron (e.g., GG20 / GG25), Ductile Iron / Nodular Iron (e.g., GGG40 / GGG50 / ASTM A536), Alloy Cast Iron, Carbon Steel (Low / Medium Carbon Steel), Alloy Steel (e.g., 4140, 4340), Free-Machining Steel (e.g., 12L14), etc.
Price: $$$
Delivery Time: < 10 days
Wall Thickness: 0.75 mm
Tolerance: ±0.005 in. (±0.125 mm)
Maximum Part Size: 200 x 80 x 100 cm
Iron Properties
| Materials |
Tensile Strength, Yield (MPa) |
Yield Strength (MPa) |
Fatigue Strength (MPa) |
Elongation at Break (%) |
Hardness (HB) | Density (g/cm³) |
Typical Applications |
| Gray Cast Iron (GG20 / GG25) | 200–260 | — (no clear yield) | 70–100 | <1 | 170–220 | ~7.2 | Machine bases, housings, brackets, pump bodies. |
| Ductile Iron / Nodular Iron (GGG40 / GGG50 / ASTM A536) | 400–550 | 250–380 | 140–200 | 7–18 | 160–230 | ~7.1 | Automotive parts, gears, hydraulic components, shafts. |
| Alloy Cast Iron | 300–600 | 200–400 | 150–250 | 2–10 | 200–300 | ~7.2 | Wear-resistant parts, high-temperature components. |
| Low Carbon Steel | 370–480 | 200–300 | 160–220 | 20–30 | 120–170 | ~7.85 | Structural parts, frames, brackets. |
| Medium Carbon Steel | 500–650 | 300–450 | 200–280 | 12–20 | 180–240 | ~7.85 | Shafts, flanges, mechanical components. |
| Alloy Steel (4140) | 850–1000 | 650–850 | 400–500 | 12–18 | 200–300 | ~7.85 | Gears, shafts, tooling parts. |
| Alloy Steel (4340) | 900–1100 | 700–900 |
450–600 |
10–15 |
220–320 |
~7.85 |
High-load shafts, aerospace and heavy-duty parts. |
| Free-Machining Steel (12L14) | 370–540 | 300–420 |
180–240 |
10–18 |
120–170 |
~7.85 |
Precision CNC parts, fittings, fasteners. |
Gray Cast Iron (GG20 / GG25)
Brittle yet machinable, excellent vibration damping, corrosion-resistant; commonly used for machine bases, housings, brackets, pump bodies, and structural components where dimensional stability is important.
Ductile/Nodular Iron (GGG40 / GGG50 / ASTM A536)
Strong, tough, fatigue-resistant, moderate machinability; ideal for automotive parts, gears, shafts, hydraulic components, and heavy-duty structural parts requiring high strength and ductility.
Alloy Cast Iron
Enhanced wear, heat, and corrosion resistance, moderate machinability; widely applied in high-temperature, wear-resistant components, industrial machinery parts, and heavy-duty tooling applications.
Low Carbon Steel
Soft, ductile, easy to machine and weld; used for structural frames, brackets, general mechanical components, and parts requiring moderate strength and cost efficiency.
Medium Carbon Steel
Stronger than low-carbon, good machinability, moderate ductility; suitable for shafts, flanges, gears, mechanical components, and medium-load parts requiring durability and dimensional accuracy.
Alloy Steel (4140 / 4340)
High strength, fatigue-resistant, heat-treatable; ideal for high-load shafts, gears, tooling, aerospace components, and applications demanding toughness, hardness, and wear resistance.
Free-Machining Steel (12L14)
Excellent machinability, good surface finish, moderate strength; commonly used for precision CNC parts, fittings, fasteners, threaded components, and high-volume production requiring efficiency and accuracy.
Custom Precision Iron CNC Machining Parts Gallery
Showcasing our precision custom iron CNC machined parts, crafted with tight tolerances, superior surface finish, and reliable durability—ideal for prototypes, pilot runs, and high-volume production across automotive, industrial, and mechanical applications.
Iron: National Standards and Equivalent Grades in Various Countries
We maintain a stock of over 40 types of certified materials, enabling us to quickly deliver precision prototypes and small-batch parts within 24 hours. Some of these materials are already IMDS certified.
| Material Type | ISO | ASTM | DIN |
JIS |
GB (China) |
Notes / Typical Use |
| Gray Cast Iron | EN-GJL-200 / EN-GJL-250 | GG20 / GG25 | GJL200 / GJL250 | FC200 / FC250 |
HT200 / HT250 |
Machine bases, housings, brackets. |
| Ductile/Nodular Iron | EN-GJS-400-15 / EN-GJS-500-7 | GGG40 / GGG50 / A536 400-15 / 500-7 | GJS-400-15 / GJS-500-7 |
FCD400 / FCD500 |
QT400-15 / QT500-7 |
Automotive parts, shafts, gears. |
| Alloy Cast Iron | EN-GJV-350 | — | GJV350 |
FCD350 |
ZG35CrMo |
Wear-resistant or high-temperature parts. |
| Low Carbon Steel | S235 / S275 | AISI 1010–1030 | St 37-2 / St 44-2 |
SS400 |
Q235 |
Structural parts, brackets, frames. |
| Medium Carbon Steel | S355 / S420 | AISI 1040–1050 | C45 / C60 |
SCM440 |
Q345 |
Shafts, flanges, mechanical components. |
| Alloy Steel | 42CrMo4 / 34CrNiMo6 | 4140 / 4340 | 42CrMo4 / 34CrNiMo6 |
SCM440 / SNCM439 |
42CrMo / 34CrNiMo6 |
High-load shafts, tooling, aerospace parts. |
| Free-Machining Steel |
— |
12L14 |
— |
SUM22L |
20B |
Precision CNC parts, fittings, fasteners. |
Iron CNC Machined Parts Quality Inspection: Inspection Equipment
Equipped with advanced inspection tools, including CMM, surface roughness testers, and hardness meters, we ensure every iron CNC machined part meets precise tolerances, consistent quality, and strict industry standards.
3D Detection
Roundness Meter
Ultrasonic Cleaning
Blu-Ray 3D Scanning
Electronic Height Gauge
Air Tightness Test
2D Detection
Hardness Testing
Surface Finish Inspection
IPQC Inspection
Microscope Surface Inspection
Salt Spray Tester
Iron CNC Machined Parts Surface Finishing Options
We offer versatile surface treatments for iron CNC machined parts, including powder coating, plating, anodizing, and heat treatment, enhancing corrosion resistance, wear performance, and aesthetic quality for diverse applications.
As Machined
Nickel Plating
Sand Blasting
Black Oxide / Blackening
Zinc Plating
Brushing / Brushed
Polishing
Electroless Nickel Plating
Chrome Plating
Passivation / Rust Prevention Oils
Powder Coating
Oil Spraying
Flexible Turnaround Time
We customize production schedules for various projects to ensure we meet your iron CNC machining needs.
Project Type
Urgent high-Precision Samples
CNC Prototype Manufacturing
Molding Requirements
High-Volume Production
Turnaround Time
24-Hour Delivery
Simple Parts: 1–3 days,Complex Parts: 3–7 days
Mold Production: Completed in 5 days, with samples delivered within 7 days.
Lead Times: Depend on part complexity, with typical delivery within 2–4 weeks, always meeting customer deadlines.
For projects with urgent deadlines, please contact us immediately for expedited processing.
Advantages and Disadvantages of Iron CNC Machining
Iron CNC machining offers a balanced combination of performance, precision, and cost efficiency, but it also has certain limitations. Below is a clear overview of the advantages and disadvantages of iron CNC machining:
Advantages of Iron CNC Machining
Disadvantages of Iron CNC Machining
Applications of CNC Machined Iron Parts
CNC machined iron parts are widely used wherever strength, durability, wear resistance, and precision are critical—from automotive and aerospace to heavy machinery, energy, and industrial tooling.
FAQs About Custom Iron CNC Machining Parts
Can Iron Be CNC Machined?
Yes. Iron, including gray iron, ductile iron, alloy cast iron, and steel, can be precisely machined using CNC milling, turning, and other subtractive processes.
What Precautions Should Be Taken When Machining Cast Iron?
Which Types of Iron Are Suitable For CNC Machining?
Gray iron (GG20/GG25), ductile/nodular iron (GGG40/GGG50/ASTM A536), alloy cast iron, low and medium carbon steel, alloy steel (4140/4340), and free-machining steel (12L14).
What Tolerances Can Be Achieved for Iron Parts?
Typical tolerances range from±0.01 mm to ±0.05 mm, depending on part size, geometry, and machining complexity.
What Challenges Might Be Encountered When Machining Iron Using CNC Machining?
Can Both Cast Iron and Heat-Treated Cast Iron Be Machined?
Yes. Regular cast iron is easier to machine, while heat-treated or hardened cast iron may require carbide tooling, EDM, or slower cutting parameters.
Can Iron Parts Be Heat-Treated or Quenched?
Yes. CNC machined iron parts can undergo annealing, tempering, normalizing, carburizing, nitriding, or quenching to achieve desired hardness, strength, or wear resistance.
What is the Cost of Custom CNC Machining of Iron Parts?
Cost depends on material type, part complexity, quantity, surface finish, and tolerance. Rapid prototypes may cost more per piece, while batch production reduces unit costs.
Is CNC Machining Cost-Effective for Small-Batch Production of CNC Iron Parts?
Yes. Especially for precision parts or prototypes, using free-machining steel or pre-cast iron blanks reduces machining time, material waste, and tooling costs.
CNC Machining Resources
Cast Iron Vs Steel: Differences Between These Metals and Pros and Cons
This article provides a comprehensive introduction to cast iron and steel, comparing their differences and respective advantages and disadvantages, aiming to assist readers in making the right material choices for their projects ...
Different Types of Iron: Definitions, Properties, and Uses
This article explains the definitions, properties, classifications, and applications of iron, and shows how each type serves specific industries. Helping you choose the right iron material for your iron CNC machined parts ...
Iron vs. Carbon Steel: Which is Better?
Read this article to learn the differences between iron and carbon steel, their properties, costs, and applications, and choose the best material for your CNC machined parts ...
2024-08-02
The manufacturer is strongly recommended. In the past few years of cooperation we have ordered several machined products from aluminum and stainless steel. These products are manufactured in compliance with tolerance requirements and require product finish. Now I have ordered another one. The service is excellent and any questions can be answered and resolved in time.
2021-05-13
The dimensions are all customized according to my drawings no tolerance issues and the parts are delivered on time. I am very satisfied with it.
2021-04-06
I pay much attention to the surface treatment aspect of this product. I was a little worried about the cooperation at the beginning. I am very satisfied with the product now and hope to cooperate for a long time.
2022-09-22
AN8 Straight PTFE Hose End Fitting for PTFE Fuel Line Fitting Adapter Black Blue Red
+86 15099911516
