Custom precision
CNC machining
1045 steel from China
High-strength medium-carbon steel components machined to tight tolerances with advanced multi-axis CNC technology — tailored for demanding industrial applications. As a trusted source for custom CNC machining steel parts China, we combine precision engineering with deep material expertise.
1045 steel · material properties
A versatile medium‑carbon steel offering an excellent balance of strength, toughness, and machinability — widely specified for structural and mechanical components. Our custom CNC machining steel parts China facility works with 1045 to deliver consistent, high‑quality results.
Chemical composition
- C 0.42 – 0.50 %
- Si 0.15 – 0.35 %
- Mn 0.60 – 0.90 %
- P ≤ 0.035 %
- S ≤ 0.040 %
Consistent chemistry ensures predictable hardening response and weldability.
Mechanical properties
- Tensile ≥ 570 MPa
- Yield ≥ 355 MPa
- Elongation ≥ 16 %
- Hardness (HB) 170 – 210
- Impact (Charpy) ≥ 27 J
Delivers reliable performance under cyclic and impact loads.
Physical characteristics
- Density 7.85 g/cm³
- Thermal conductivity 49.8 W/(m·K)
- Specific heat 486 J/(kg·K)
- Electrical resistivity 0.15 μΩ·m
- Modulus of elasticity 205 GPa
Stable physical properties across operating temperature ranges.
Heat treatment response
- Normalizing 850 °C
- Hardening 840 °C · oil
- Tempering 550 – 650 °C
- Hardness range HB 200 – 300
- Case hardening optional
Tailored thermal cycles achieve specified hardness and strength profiles.
Global steel grade equivalents
Quick reference for 1045 medium‑carbon steel under major international standards. This facilitates accurate material selection for custom CNC machining steel parts China, ensuring seamless substitution and global compliance.
China GB
- Standard GB/T 699
- Grade 45# (45)
- Carbon range 0.42 – 0.50 %
- Equivalent Fully equivalent
Widely used for shafts, gears, and structural components in general machinery.
USA AISI / SAE
- Standard ASTM A29 / SAE J403
- Grade 1045
- Carbon range 0.43 – 0.50 %
- Equivalent Primary reference
The most common medium‑carbon steel in the US, offering good hardenability and machinability.
Japan JIS
- Standard JIS G4051
- Grade S45C
- Carbon range 0.42 – 0.48 %
- Equivalent Fully equivalent
Widely specified for machine structural use in automotive and industrial equipment.
Germany DIN
- Standard DIN EN 10083
- Grade C45 (1.0503)
- Carbon range 0.42 – 0.50 %
- Equivalent Fully equivalent
European standard equivalent with excellent cold‑forming properties and consistent response to heat treatment.
Precision CNC machining capabilities
From simple shafts to complex contoured parts — our machining center is equipped to handle a wide spectrum of 1045 steel components with repeatable accuracy. We deliver custom CNC machining steel parts China for industries that demand precision and reliability.
CNC turning
- Diameter range 5 – 800 mm
- Length capacity up to 1 500 mm
- Tolerance ±0.005 mm
- Live tooling available
- Sub‑spindle for complex parts
Ideal for shafts, pins, bushings, and rotational symmetric geometries.
CNC milling
- Table size 1 200 × 600 mm
- Axis 4‑axis / 5‑axis
- Spindle speed 12 000 rpm
- Positioning ±0.004 mm
- Surface finish Ra 0.8 – 1.6
Complex 3D contours, pockets, flanges, and precision hole patterns.
Drilling & tapping
- Drill depth up to 500 mm
- Diameter 1 – 80 mm
- Hole tolerance H7
- Thread range M2 – M30
- Deep‑hole drilling optional
Precise hole positioning and thread quality for assembly- ready components.
Grinding & finishing
- Cylindrical ±0.002 mm
- Surface grinding ±0.003 mm
- Surface roughness Ra 0.4
- Flatness 0.005 / 300 mm
- Superfinishing available
Achieves critical dimensional and surface quality for high‑performance applications.
Surface finishing options
Enhance corrosion resistance, wear properties, and aesthetic appearance with a range of post‑machining surface treatments tailored for 1045 steel. Every custom CNC machining steel part China can be finished to meet specific environmental or functional requirements.
Sandblasting
- Cleanliness Sa 2.5
- Roughness Ra 3.2 – 6.3
- Media aluminum oxide / steel grit
- Application scale removal, prep
Provides a uniform matte surface, ideal for coating adhesion and visual inspection.
Zinc plating
- Coating thickness 8 – 12 μm
- Salt spray ≥ 96 h
- Appearance bright / yellow / olive
- Hydrogen embrittlement relieved
Cost‑effective corrosion protection for components exposed to moisture and mild chemicals.
Phosphating
- Coating weight 5 – 20 g/m²
- Crystal structure zinc / manganese
- Friction reduction ✓
- Paint adhesion excellent
Creates a conversion layer that improves lubricity and serves as an ideal base for subsequent coatings.
Black oxide (blackening)
- Film thickness 1 – 3 μm
- Corrosion resistance moderate
- Appearance uniform black
- Post‑treatment oil / wax sealing
Delivers an attractive, low‑reflectivity finish with minimal dimensional change — ideal for visible mechanical parts.
Featured products
A selection of representative custom CNC machining steel parts China — each machined from 1045 or equivalent grades to demonstrate our capability across diverse geometries and applications.
Industry applications
From heavy machinery to precision drivetrains — 1045 steel components machined to exacting standards serve a broad cross‑section of industries worldwide. Our custom CNC machining steel parts China are engineered for performance in the most demanding environments.
Automotive & transport
- Transmission shafts & gears
- Connecting rods & steering knuckles
- Axle components & wheel hubs
- Brake system brackets
Parts that demand high fatigue strength and dimensional consistency in safety‑critical assemblies.
Agricultural machinery
- Plough shares & cultivator tines
- Harvester components
- Tractor linkage parts
- Wear‑resistant ground‑engaging tools
Rugged components that withstand abrasive soil conditions and heavy impact loads.
Construction & earthmoving
- Hydraulic cylinder rods
- Excavator bucket pins & bushings
- Concrete pump wear parts
- Crawler track components
Heavy‑duty parts engineered for extreme pressure, abrasion, and outdoor exposure.
Energy & power
- Wind turbine main shafts
- Oil & gas drilling components
- Generator rotor shafts
- Valve bodies & pump parts
Critical components for renewable and conventional energy systems, built for long‑term reliability.
Why choose our 1045 steel machining
We combine deep metallurgical understanding with advanced manufacturing to deliver components that perform — on time and to spec. As a dedicated partner for custom CNC machining steel parts China, we bring precision, expertise, and reliability to every project.
Precision engineering
- State‑of‑the‑art CNC machining centers
- Tolerances down to ±0.005 mm
- Complex geometry capability
- In‑process measurement & adjustment
Every part is machined with rigorous attention to dimensional accuracy and surface integrity.
Deep material expertise
- Specialists in medium‑carbon steel processing
- Optimized cutting parameters for 1045
- Heat treatment planning & execution
- Failure analysis & prevention
We understand how 1045 steel behaves under the tool — and in service.
Reliable on‑time delivery
- Agile production planning
- Flexible batch sizes — prototype to volume
- Transparent progress tracking
- Dedicated logistics coordination
We keep your project on schedule with proactive communication and responsive scheduling.
Rigorous quality control
- Full dimensional inspection — CMM & gauges
- Surface finish & hardness verification
- Material traceability & test reports
- Process control from raw stock to final part
Every batch is inspected to ensure compliance with your specifications and performance requirements.
About Us
We provide custom machined parts, 5-axis linkage CNC machining, and the design, production, and assembly of machinery and equipment.