Automotive Springs
Automotive springs,
made in Thailand.
Compression, extension and torsion springs, wire forms and stamped spring plates for automotive sub-assemblies — produced in Rayong, Thailand under ISO 9001:2015.
A second production location for drawing-controlled parts
Automotive buyers need repeatability, documented inspection and a supply route that does not depend on a single location. Our Rayong plant combines spring winding, wire forming, stamping, heat treatment and in-house testing under one quality system.
ISO 9001:2015 and ISO 14001:2015 are in place. Certification of an automotive quality management system is in progress; we state that plainly rather than imply a certificate we do not hold.
- Compression, extension and torsion springs for sub-assemblies
- Wire forms and stamped spring plates
- Salt spray and fatigue testing in-house
- 2.5D dimensional inspection
- Rayong, Thailand production base
Where our parts fit in the vehicle
We supply springs and wire forms for automotive sub-assemblies. The drawing, material specification and test plan define the part; we confirm feasibility before quoting.
Automotive spring specifications
Current production is shown below. The inspection and test plan is agreed at RFQ, including any documentation your program requires.
| Parameter | Capability |
|---|---|
| Product types | Compression, extension and torsion springs; wire forms; stamped spring plates. |
| Wire diameter | 0.08–8.0 mm in current production. Planned expansion to 12.0 mm as new equipment is installed. |
| Materials | 65Mn, 72A, 82B, 60Si2Mn; stainless steel 301, 302, 304 and 316. |
| Heat treatment | In-house stress relief and tempering. |
| Surface finish | Anti-rust oil, electrophoresis (E-coat), zinc plating, nickel plating, spray coating. |
| Wire tolerance | JIS wire tolerance by grade. ASTM wire specification and SMI commercial tolerances available for US programs. |
| Testing | Load and torque testing, 2.5D vision measurement, salt spray testing and fatigue testing. |
| Quality system | ISO 9001:2015 and ISO 14001:2015. Automotive QMS certification in progress. |
| Documentation | Inspection and test plan agreed at RFQ. |
| Samples | Prototype and pre-production samples against drawing. |
Wire diameter is inspected to the JIS tolerance of the ordered wire grade. For US programs, we can quote and inspect to the relevant ASTM wire specification and SMI commercial tolerances.
Materials and finishes
The wire grade and finish should follow the load, fatigue and corrosion exposure of the application — not a default.
65Mn · 72A · 82B · 60Si2Mn
Selected for strength, elasticity and fatigue performance according to the load cycle and the material specification on the drawing.
301 · 302 · 304 · 316
Used where moisture, cleaning or a corrosive environment makes a coated carbon spring unsuitable.
Oil · E-coat · zinc · nickel · spray
Anti-rust oil, electrophoresis, zinc plating, nickel plating and spray coating are available; salt spray testing is performed in-house.
Tested against the plan agreed at RFQ
Automotive programs need evidence, not just a good first part. We run load, torque, salt spray and fatigue tests in-house and inspect critical dimensions with a 2.5D vision system.
- Raw material tensile strength and metallographic structure
- Load and torque testing against the drawing
- 2.5D vision measurement of critical dimensions
- Salt spray testing for plated and coated parts
- Fatigue testing for cycle-life validation
- Inspection records agreed at RFQ
What to send with your drawing
A complete drawing and test plan shorten the quote and remove assumptions.
- Drawing with critical dimensions and tolerances
- Material specification
- Annual volume and delivery schedule
- Test plan and acceptance criteria
- Documentation requirements
- Surface finish and delivery location
PDF, DXF, STEP or a clear photo
Email your drawing to info@aofengspringthailand.com. We confirm feasibility, the wire range, the test plan and documentation scope before quoting.
Automotive spring questions
Are you IATF 16949 certified?
Not yet. The Rayong plant is certified to ISO 9001:2015 and ISO 14001:2015, and certification of an automotive quality management system is in progress.
Which automotive parts do you produce?
Compression, extension and torsion springs, wire forms and stamped spring plates for automotive sub-assemblies. We review the drawing and test plan before quoting.
Can you run salt spray and fatigue tests?
Yes. Both are performed in-house; the acceptance criteria and test plan are agreed at RFQ.
Where is the plant?
Rayong, Thailand. Address: 7/52 Moo 4, Phananikom, Nikom Phatthana District, Rayong Province 21180, Thailand.
Send a drawing, get a quote
Send the drawing, material specification and test plan. We will confirm feasibility and documentation scope before quoting.
AOFENG SPRING (THAILAND) · Rayong, Thailand