Key Components:
Steering knuckles, control arms, tie rods, ball studs and ball seats, differential housings, wheel hubs, shift forks, brake caliper brackets, engine brackets, transmission gears and rocker arms, new energy vehicle motor brackets, and related parts; individual weights range from 0.1 kg to 30 kg.
Precision Casting Solutions for Automotive Components
Automotive castings cover chassis, transmission, steering, braking, and power systems for commercial vehicles, passenger cars, and new energy vehicles. The automotive industry requires high dimensional consistency, stable volume production, lightweight design, and strict delivery rhythm, and commonly requires IATF 16949 quality systems and PPAP production part approval processes.
We use low-temperature wax silica sol investment casting to produce low- and medium-carbon steel and low-alloy steel automotive safety and functional parts. The castings have high dimensional accuracy and good surface quality, with SPC process control and volume supply capability to support OEM and Tier 1 supplier audits.
IATF 16949 System: Operations follow automotive quality system requirements and support PPAP/APQP/FMEA/SPC processes.
Batch Consistency: Automated shell-making and melting lines support CPK >=1.33 with low dimensional variation between batches.
Precision Near-Net Forming: Investment castings reduce welding and machining, supporting lightweight chassis design.
Reliable Safety Parts: Steering and braking safety parts undergo 100% NDT and hardness screening for zero-defect delivery.
Cleanliness Assurance: Machined parts are cleaned to specified cleanliness grades and can go directly to assembly lines.
The following are typical examples of automotive castings (8 items shown); other specifications can be customized based on customer drawings and vehicle models:
| No. | Part Name | Common Materials | Process / Remarks |
|---|---|---|---|
| 1 | Steering Knuckle | 42CrMo / 40Cr / 20MnCr5 | Quenched and tempered + NDT, chassis safety part |
| 2 | Control Arm / Suspension Arm | 42CrMo / S355JR / 40Cr | Weldable, precise dimensions |
| 3 | Ball Stud / Ball Seat | 40Cr / 42CrMo / 20MnCr5 | Precision spherical machining, surface hardening |
| 4 | Differential Housing / Reducer Housing | QT500-7 / 42CrMo / 20MnCr5 | High-precision CNC-machined hole system |
| 5 | Wheel Hub / Hub Unit Housing | 45 Steel / 42CrMo / QT500-7 | Precision grinding of bearing seat |
| 6 | Shift Fork | 40Cr / 45 Steel / 20MnCr5 | High-frequency hardening on wear surface |
| 7 | Brake Caliper Bracket | 42CrMo / QT600-3 / 45 Steel | 100% MT inspection |
| 8 | Engine / Motor Bracket | S355JR / 42CrMo / 304 | Vibration damping, dimensional stability |
- System Assurance: We operate according to IATF 16949 requirements and can provide PPAP Level 3 documentation.
- Process Capability: Key dimensions are monitored by SPC, with CPK >=1.33 and special characteristics reaching CPK >=1.67.
- Non-Destructive Testing: Safety parts undergo 100% MT inspection, with zero tolerance for cracks.
- Hardness Sorting: Heat-treated parts receive 100% hardness testing, and nonconforming parts are automatically rejected.
- Cleanliness: Machined parts are cleaned to specified cleanliness levels, suitable for direct assembly-line use.
- Commercial vehicle steering knuckle and control arm volume project: 42CrMo quenched and tempered, annual supply of 300,000 pieces, PPAP approved.
- New energy vehicle motor brackets and reducer housings: Cast steel and ductile iron material options supplied to Tier 1 customers.
- Brake system caliper brackets: 42CrMo precision casting + machining, 100% MT inspection.
- Recommended combinations: Steering knuckle + control arm + tie rod ball joint chassis sets; control arm + bushing pressed assembly delivery.
- Automotive safety and functional parts can be developed from drawings with APQP, FMEA, control plan, and dimensional reports.
Frequently Asked Questions (FAQ)
We support automotive customers with stable batch production, safety-part inspection, PPAP documentation, and assembly-ready cleanliness control.
Are you certified to IATF 16949?
We operate according to the IATF 16949 system and can support customer certification and second-party audits. Certificate copies can be provided during the commercial stage if required.
Can you provide PPAP documents?
Yes. We can provide a PPAP Level 3 package, including process flow chart, PFMEA, control plan, MSA, initial process capability study, and full-dimensional inspection report.
What is your annual capacity and volume delivery capability for automotive castings?
Our investment casting line has an annual capacity of 2,000 tons of precision castings. Automotive castings can support stable monthly orders of 30,000-50,000 pieces, with safety stock for demand fluctuations.
What material options are available for new energy vehicle parts?
In addition to conventional 42CrMo, 40Cr, and other alloy structural steels, we can provide aluminum alloy, ductile iron, and stainless steel options for lightweight and corrosion-resistant NEV motor, battery pack, and chassis components.
Request a Quote and Samples for Automotive Castings
Please provide part drawings, material standards, annual volume, and PPAP requirements; we will arrange technical review and provide samples.