High Strength Stainless Steel Spring Strip

1. Brand & Production Background

Qihong, based in Ningbo, China, focuses on High Strength Stainless Steel Spring Strip, cold‑rolled strips, and precision fasteners. With advanced production lines, complete testing equipment, standardized management, and skilled technicians, we provide stable and high‑performance high‑strength stainless steel spring strips for global customers.

2. Product Core Advantages

2.1 High Strength & Excellent Elasticity

• Adopt special cold rolling and temper control process; tensile strength up to 1500–1900 MPa; yield strength matching spring working conditions
• Stable elastic recovery rate >95%; no permanent deformation after millions of cycles
• Suitable for high‑frequency dynamic load and long‑term fatigue working conditions

2.2 Dimensional Precision & Surface Quality

• Thickness range: 0.03–1.5 mm; tolerance ±0.005 mm
• Width range: 2.0–300 mm; edge can be slit edge or round edge
• Surface: 2D, brushed, polished, etc., with good flatness and formability

2.3 Material & Corrosion Resistance

Main grades: 301, 304, 316L, 631, 430, etc.

• 301: High strength, outstanding work hardening, preferred for high‑cycle springs
• 304: Balanced corrosion resistance and elasticity, general‑purpose type
• 316L: Strong corrosion resistance, for marine, chemical, and humid environments
• 631: Precipitation hardening, ultra‑high strength and thermal stability

2.4 Process & Quality Control

• Precision cold rolling + online temper control
• Professional hardness, tensile, fatigue, and salt spray testing
• Full‑process quality traceability to ensure batch stability

3. Typical Application Cases

Case 1 Automotive Connector Springs

A Tier 1 automotive parts factory used Qihong 301 high‑strength spring strip to produce connector shrapnel. Products withstood high‑temperature vibration in the engine compartment and salt spray corrosion tests, maintaining stable contact force after 1 million cycles. The customer’s qualification rate increased by 12%, and service life extended by more than 2 times.

Case 2 Precision Electronic Battery Contacts

A consumer electronics brand adopted Qihong ultra‑thin high‑strength spring strip (thickness 0.08 mm) for battery shrapnel. With high elasticity recovery and low resistance, it ensured stable power supply for compact devices. The customer’s defective rate of poor contact decreased by 70%.

Case 3 Medical Device Elastic Clasps

A medical device manufacturer used Qihong 316L high‑strength spring strip to produce instrument clasps. It had good biocompatibility, corrosion resistance, and disinfectant stability, meeting repeated use and sterilization requirements, and passed medical material performance certification.

4. Product Specifications (Typical)

5. FAQ

Q1: What is the difference between Qihong high‑strength stainless steel spring strip and ordinary stainless steel strip?

A: Ordinary strips focus on corrosion resistance and formability, while our spring strip is specially treated for high yield strength, elastic stability, and fatigue resistance. It can rebound stably for a long time under high stress and is not easy to relax or deform, suitable for elastic components.

Q2: How to choose the right material grade for spring strip?

A: Choose 301 for high strength and high cycle; choose 304 for general corrosion and elasticity; choose 316L for strong corrosion (humid, chemical, marine); choose 631 for ultra‑high strength and high temperature. We provide material selection support according to working conditions.

Q3: Can you customize non‑standard thickness, width, hardness, and surface?

A: Yes. As a professional manufacturer, Qihong supports customized thickness, width, temper, surface, and edge treatment according to drawings or parameters, with flexible batch sizes and stable quality to meet precision component needs.