Custom Precision CNC Steel 1045 Parts in China
We manufacture custom CNC machining steel 1045 parts in China to your exact drawings, delivering tight-tolerance components with consistent quality, competitive pricing, and reliable lead times. From prototype runs to high-volume production, our CNC facilities turn AISI 1045 medium carbon steel into precision shafts, bushings, gears, fasteners, and structural components for global industrial markets.
Whether you need turned, milled, ground, or heat-treated 1045 steel components, our engineering team supports you from drawing review through final inspection, ensuring every part meets your dimensional and material specifications.
About AISI 1045 Steel for Custom CNC Parts
AISI 1045 is a widely used medium carbon steel offering an excellent balance of strength, toughness, wear resistance, and machinability — making it one of the most cost-effective choices for custom CNC machined mechanical components.
Material Characteristics
With a nominal carbon content of 0.45%, 1045 steel responds well to quenching and tempering, allowing hardness levels up to approximately HRC 55–60 in small sections. In the normalized or as-rolled condition it typically exhibits a tensile strength of 570–700 MPa and a yield strength of 310–415 MPa, providing reliable structural performance for moderately loaded components.
The material machines cleanly on modern CNC equipment, producing excellent surface finishes and holding tight dimensional tolerances. It can be welded with appropriate preheating, and it accepts a wide range of surface treatments including black oxide, zinc plating, chrome plating, nitriding, and induction hardening.
Why Customers Choose 1045
- Balanced strength and toughness for general mechanical use
- Excellent machinability on CNC lathes and machining centers
- Responsive to heat treatment for improved hardness and wear
- Readily available in bar, tube, plate, and forged billet forms
- Cost-effective compared to alloy steels for many applications
- Versatile across automotive, agricultural, and industrial sectors
Typical Mechanical Properties of 1045 Steel
The following values represent typical as-rolled / normalized conditions. Actual properties vary with section size, heat treatment, and processing route — we work to your specified hardness and mechanical property requirements.
Tensile Strength
570 – 700 MPa in the normalized condition. After quenching and tempering, values can reach 900 – 1200 MPa depending on tempering temperature and section thickness.
Yield Strength
310 – 415 MPa as-rolled or normalized. Heat-treated components typically achieve 600 – 900 MPa, providing robust resistance to plastic deformation under working loads.
Elongation
12 – 16% in normalized condition, indicating reasonable ductility. Properly tempered 1045 retains sufficient toughness for dynamic loading while delivering enhanced hardness.
Hardness
Approximately 170 – 210 HB as-rolled. Through-hardened small sections can reach HRC 55 – 60; induction-hardened surfaces commonly achieve HRC 50 – 58 for wear resistance.
Density
7.85 g/cm³, consistent with standard carbon steels. This allows straightforward weight estimation from part volume for both design optimization and shipping cost planning.
Machined Surface Finish
As-machined surfaces typically achieve Ra 1.6 – 3.2 μm. Precision grinding can improve this to Ra 0.2 – 0.8 μm, and polishing or honing can reach Ra 0.05 – 0.1 μm for high-precision sealing surfaces.
1045 Steel Equivalent Grades by National Standard
AISI 1045 is known by different designations under various national and international standards. While the chemical composition and mechanical properties are broadly similar, minor differences exist. We source material certified to the grade matching your drawing and can provide mill test reports upon request.
| Country / Region | Standard | Grade Designation | Material Number (W-Nr.) | Notes |
|---|---|---|---|---|
| United States | AISI / SAE | 1045 | — | Base reference grade; widely used globally |
| United States | ASTM A29 | 1045 | — | Standard specification for steel bars |
| International | ISO 683-1 | C45E, C45R | — | Heat-treatable steels for general engineering |
| European Union | EN 10083-2 | C45E | 1.1191 | Most common European equivalent |
| Germany | DIN 17200 | Ck45 | 1.1191 | Classic German grade; still widely referenced |
| China | GB/T 699 | 45# (45 steel) | — | Dominant domestic grade in Chinese manufacturing |
| Japan | JIS G4051 | S45C | — | Common in Japanese machinery and tooling drawings |
| France | AFNOR NF A35-552 | XC45, C45 | — | French national equivalent |
| United Kingdom | BS 970-1 | 080M46, 080A47 | — | British engineering steel designations |
| Russia | GOST 1050 | 45 (Ст45) | — | Common in CIS-region technical drawings |
| Italy | UNI 7845 | C45 | — | Italian standard equivalent |
| Sweden | SS 1672 | SS 1672 | — | Swedish standard grade |
Note: Equivalent grades may have slight differences in sulfur content, hardenability, or guaranteed mechanical properties. Always confirm the exact grade requirement on your drawing or specification sheet before production. We can cross-reference and substitute grades with your written approval.
CNC Machining Capabilities for 1045 Steel Parts
Our shop floor is equipped with multi-axis CNC lathes, vertical and horizontal machining centers, cylindrical and surface grinders, and secondary operation equipment — all configured to produce custom CNC machining steel 1045 parts in China with repeatable precision.
CNC Turning
Multi-axis CNC lathes with live tooling produce shafts, bushings, sleeves, pins, and threaded components up to 500 mm diameter and 1500 mm length. We hold diameter tolerances down to ±0.005 mm on critical features.
CNC Milling
3-axis, 4-axis, and 5-axis machining centers handle complex prismatic geometries, pockets, slots, keyways, and contoured surfaces. Travels up to 1500 × 800 × 700 mm accommodate medium to large 1045 steel components.
Precision Grinding
Cylindrical, surface, and centerless grinding deliver fine finishes and tight dimensional control. We achieve Ra 0.2 – 0.8 μm surface finishes and roundness below 0.003 mm on bearing journals, sealing surfaces, and precision pins.
Threading & Tapping
We produce external and internal threads to ISO metric, UNC/UNF, BSP, BSW, ACME, trapezoidal, and custom thread profiles. Thread milling and rigid tapping ensure consistent pitch and thread quality across production batches.
Spline & Gear Machining
Broaching, hobbing, shaping, and wire EDM produce internal and external splines, serrations, and gear teeth per ANSI, DIN, JIS, or custom specifications. We manufacture splined shafts, hubs, and geared components from 1045 steel.
Heat Treatment & Finishing
We coordinate quenching, tempering, normalizing, induction hardening, case hardening, and stress relieving through trusted partners. Surface treatments include black oxide, zinc plating, nickel plating, chrome plating, phosphating, and painting.
Tolerances and Dimensional Capabilities
We machine 1045 steel parts to the tolerances defined on your drawings. The following ranges represent our standard achievable capabilities across CNC turning, milling, and grinding processes.
Linear Tolerance
Standard: ±0.05 mm
Precision: ±0.01 mm
Ultra-precision grinding: ±0.005 mm
Diameter Tolerance
Turning: IT7 – IT9
Grinding: IT5 – IT6
Honing: IT4 – IT5 on precision bores
Geometric Tolerance
Concentricity: 0.005 – 0.02 mm
Roundness: 0.002 – 0.01 mm
Flatness: 0.005 – 0.02 mm
Part Size Range
Turning diameter: 5 – 500 mm
Turning length: up to 1500 mm
Milling envelope: up to 1500 × 800 × 700 mm
Applications and Industries Served
Custom CNC machining steel 1045 parts in China are used across a broad spectrum of industries where moderate strength, good machinability, and cost efficiency are required. Below are the primary sectors we supply.
Automotive & Transportation
Transmission shafts, axle components, gear blanks, rocker arms, connecting rod bolts, steering knuckles, and differential parts. 1045 steel provides the strength and wear resistance needed for powertrain and chassis components.
Agricultural Machinery
PTO shafts, gearbox components, cultivator tines, harrow discs, sprocket hubs, and implement linkage pins. 1045 steel withstands the shock and abrasive conditions common in farming equipment.
Construction & Heavy Equipment
Hydraulic cylinder rods, pinion shafts, bucket pins, track components, conveyor rollers, and structural fasteners. The material's toughness and heat-treatability suit demanding construction environments.
Industrial Machinery
Machine tool spindles, gear shafts, cam followers, roller chains, coupling hubs, and linear motion components. 1045 steel is a workhorse material for general-purpose mechanical drives and power transmission systems.
Oil, Gas & Energy
Valve stems, pump shafts, connector bodies, wellhead components, and turbine fasteners. Heat-treated 1045 delivers reliable mechanical performance in moderate-pressure and medium-temperature service conditions.
Mining & Material Handling
Conveyor drum shafts, crusher components, pulley hubs, idler rollers, and screening equipment parts. The combination of strength, toughness, and wear resistance makes 1045 suitable for heavy-duty material handling applications.
Custom 1045 Steel Products We Manufacture
The following products represent common custom CNC machining steel 1045 parts in China that we produce for customers worldwide. Each part is manufactured to customer drawings with specified tolerances, heat treatment, and surface finish requirements.
Our Production Workflow for Custom 1045 Parts
Every order of custom CNC machining steel 1045 parts in China follows a structured production workflow designed to ensure dimensional accuracy, material traceability, and on-time delivery from prototype through full production.
Drawing Review & DFM
Our engineers review your 2D drawings, 3D models, and specifications. We provide design-for-manufacturability feedback, identify critical tolerances, and confirm material grade, heat treatment, and surface finish requirements before production begins.
Material Sourcing & Inspection
We source 1045 / 45# steel bar, tube, plate, or forged billet from qualified mills. Incoming material undergoes dimensional inspection and hardness verification. Mill test reports are retained and can be provided with each shipment for full material traceability.
CNC Programming & Setup
Our CAM programmers generate optimized toolpaths for CNC lathes and machining centers. Fixtures and cutting tools are prepared, first-article setup is verified, and process parameters are locked to ensure repeatability across the production batch.
Machining & In-Process Inspection
Parts are machined using CNC turning, milling, drilling, tapping, and secondary operations. Operators perform in-process dimensional checks at defined intervals using calipers, micrometers, bore gauges, and CMM to maintain tolerance compliance throughout the run.
Heat Treatment & Finishing
If specified, parts undergo quenching, tempering, induction hardening, or stress relieving. Hardness is verified per specification. Surface treatments such as black oxide, zinc plating, or grinding are applied to achieve the required corrosion resistance and surface finish.
Final Inspection & Packaging
Finished parts receive a final dimensional and visual inspection against the drawing. Critical dimensions are recorded in inspection reports. Parts are cleaned, protected with rust-preventive oil or VCI packaging, and packed in wooden crates or cartons suitable for international shipping.
Advantages of Sourcing Custom 1045 CNC Parts from China
Partnering with a Chinese CNC machining supplier for your 1045 steel components offers compelling advantages in cost, capacity, and supply chain flexibility — without compromising on precision or quality.
Competitive Manufacturing Cost
China's mature steel supply chain and efficient manufacturing infrastructure allow us to produce custom CNC machining steel 1045 parts in China at significantly lower cost than equivalent production in North America or Western Europe. Savings typically range from 30% to 60% on machined component costs, even after international shipping and duties are factored in.
Large Production Capacity
Our facilities handle both low-volume prototype runs (1 – 50 pieces) and high-volume production (thousands to tens of thousands of pieces per month). With multiple CNC lathes and machining centers operating in parallel, we can scale production to match your demand fluctuations and ramp-up schedules without long lead-time extensions.
Integrated Supply Chain
We manage the complete manufacturing chain in-house or through established local partners: raw material sourcing, forging, CNC machining, heat treatment, surface finishing, and packaging. This single-point coordination reduces communication overhead, shortens overall lead times, and ensures consistent quality accountability across every process step.
Engineering Support & Flexibility
Our engineering team provides DFM analysis, tolerance optimization, material substitution advice, and cost-reduction suggestions. We work with your design changes throughout the product lifecycle, support rapid prototyping for new part development, and maintain flexible minimum order quantities to accommodate both custom one-off components and recurring production orders.
Frequently Asked Questions
Common questions customers ask when ordering custom CNC machining steel 1045 parts in China.
What is the minimum order quantity for custom 1045 steel parts?
We accept orders starting from a single piece for prototype or one-off custom components. For production orders, there is no strict minimum — we quote based on your actual quantity. Unit pricing decreases significantly at higher volumes due to reduced setup and tooling amortization per part.
What file formats do you accept for drawings and models?
We accept 2D drawings in PDF, DWG, DXF, and TIFF formats, and 3D models in STEP, IGES, STL, Parasolid, and SolidWorks native formats. A detailed 2D drawing with dimensional tolerances, material specification, heat treatment, and surface finish requirements is preferred for production quoting.
What are typical lead times for custom 1045 CNC machined parts?
Prototype quantities (1 – 10 pieces) typically ship within 7 – 15 working days. Production batches (50 – 500 pieces) generally require 15 – 25 working days. Larger orders or parts requiring heat treatment, special surface finishing, or complex fixturing may require additional time. We provide confirmed lead times with every quotation.
Can you provide material traceability and inspection reports?
Yes. We retain mill test reports (MTR) for all raw material and can provide copies with your shipment. Finished parts are accompanied by dimensional inspection reports covering critical dimensions measured with calibrated instruments including micrometers, bore gauges, and coordinate measuring machines (CMM). Hardness test reports are available for heat-treated components.
Your Trusted Partner for Custom 1045 Steel CNC Parts
From single prototypes to volume production, we deliver custom precision CNC steel 1045 parts in China with the accuracy, consistency, and cost efficiency your projects demand. Our engineering team, modern CNC equipment, and integrated supply chain ensure that every component — whether a simple turned shaft or a complex multi-feature machined assembly — meets your specifications and arrives ready for assembly.
We work with AISI 1045, SAE 1045, ASTM A29 1045, EN C45E (1.1191), DIN Ck45, GB 45#, JIS S45C, and equivalent grades worldwide. Send us your drawings and let us provide a competitive quotation for your next custom CNC machining steel 1045 parts in China project.