TECHNICAL SERVICES
● In-house tooling design and manufacturing enable rapid prototype development, shorter lead times, and responsive engineering support.
● Pre-hardened spring steel combined with precision forming and stress-relief tempering reduces dimensional variation, improves batch consistency, and enhances efficiency.
● High-precision progressive stamping and forming processes ensure strict dimensional consistency, stable performance, and burr control.
● 100% inspection and batch grading ensure highly consistent product performance and minimize assembly variation in customer production lines.
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R&D & TOOLING
At Hongtian Spring, supported by over 20 advanced laser and wire cutting equipment, tooling is designed and developed by our experienced in-house team, enabling us to support faster engineering changes, shorter prototype lead times, and better consistency from sample validation through mass production.
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STAMPING & MANUFACTURING
From precision stamping and forming to wire spring manufacturing, Hongtian provides integrated manufacturing capabilities from tooling and prototyping to mass production.
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HEAT TREATMENT
We develop and control heat treatment processes to achieve the strength, fatigue resistance, and dimensional stability.
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SURFACE FINISHING & COATING
Our application-specific coatings and surface treatments are precisely engineered . to optimize the longevity and function of your custom springs.
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TESTING & QUALITY CONTROL
Hongtian provides comprehensive testing and quality assurance throughout the product lifecycle, covering material, dimensional, mechanical, performance, and fatigue validation from development to serial production.
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MATERIALS
Performance starts with the right material choice. Typical material grades we use;
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65Mn · SK5 · 50CrV4. 51CrV4 · SPCC · 70#C · C75S · CK75. 75Cr1 · 70#B · 82B · 55CrSi Full material traceability, mill certificates, and material inspection records are available.