stainless steel spring strips

Ningbo Qihong Stainless Steel specializes in precision stainless steel processing and manufacturing. With advanced technical equipment, a scientific management system, and professional testing capabilities, we provide high-quality stainless steel spring strips to various industries. We understand the high standards required for materials in precision manufacturing and demanding working conditions. This stainless steel spring strip is a core product developed based on our years of industry experience, offering both stable performance and adaptability, helping our customers enhance the competitiveness of their end products.

Send Inquiry

Product Description

Product Features:

As a professional stainless steel manufacturer, we consistently adhere to high standards in material selection and process control for our spring strips. We use high-quality steel grades such as SUS 301, 304, 316, 316L, 420J2, and 17-7PH. These materials effectively resist oxidation, acid and alkali corrosion, and salt spray corrosion, ensuring long-term stable operation even in harsh environments, significantly reducing maintenance costs. For the core elastic requirements of spring strips, we precisely control the production process through precision cold rolling and strict heat treatment, resulting in excellent elastic limit and yield strength ratio. They can quickly return to their original shape after repeated bending and compression, exhibiting outstanding fatigue resistance and meeting the reliability requirements for millions of cycles of use.

Specific material and mechanical performance parameters are detailed in the table below:

Based on the needs of different industries, we offer a variety of hardness options and precise dimensional control across all specifications, along with various surface treatment solutions, fully meeting the stringent requirements of precision stamping and automated assembly. Some special materials can also meet the needs of special scenarios such as high and low temperatures.

Parameter Category	Specific Parameter Content
Common Materials	SUS 301, 304, 316, 316L, 420J2, 17-7PH, etc.
Material Core Components	304: Cr 18%-20%, Ni 8.0%-10.5%; 316: additional 2% Mo element
Corrosion Resistance	316 material has 3 times better seawater corrosion resistance than 304, and can withstand salt spray tests for over 1000 hours.
Mechanical Properties	Tensile strength ≥520MPa, elongation in annealed state ≥40%, minimum bending radius as low as 0.3mm
Hardness Levels	ANN soft state, 1/4H (HV140-180), 1/2H, 3/4H, H hard state (HV310-370), EH extra hard, SH super hard
Size Range	Thickness: 0.05mm-3.0mm (regular stock 0.10, 0.12, 0.15-1.60mm, etc.); Width: 5mm-1219mm
Dimensional Tolerance	Thickness tolerance ±0.01mm; 10mm-250mm width tolerance ±0.10mm-±0.30mm (conforms to GB/T4231, ASTM A480 standards)
Surface Treatment	2B matte, BA bright, No.1, HL brushed, 8K mirror finish; surface roughness Ra≤0.4μm for 0.1mm ultra-thin strip
Operating Conditions	17-7PH stainless steel has a working temperature range of -196℃ to 800℃ and maintains a stable elastic modulus at high temperatures.

Product Applications:

Thanks to its excellent overall performance, this stainless steel spring strip has been widely used in several core areas: precision connectors, spring clips, relay components, mobile phone SIM card trays, and laptop hinges in the electronics and electrical industries; brake pads, clutch springs, seat belt retractors, and sensor components in the automotive industry; high-performance springs, retaining rings, washers, and precision instrument components in mechanical manufacturing; surgical instrument components and medical sensors in medical equipment (due to its biocompatibility and ease of sterilization); and core components of household appliances such as washing machine parts and microwave oven door lock mechanisms.

Why Choose Us?

Choosing Qihong Stainless Steel means not only receiving high-quality products that meet international standards such as GB, ASTM, and JIS, but also enjoying comprehensive professional service throughout the entire process. We are ISO 9001 certified, and our products comply with RoHS environmental directives. Every batch of products undergoes rigorous spectral analysis, mechanical performance testing, and non-destructive testing to ensure zero-defect delivery, and we provide official material certificates (MTC). Our professional engineering team provides full support, including material selection advice, heat treatment solutions, and processing guidance, helping customers optimize designs and reduce costs. With our comprehensive inventory and strong supply chain, we offer one-stop value-added services such as slitting, heat treatment, and surface treatment, supporting non-standard customization according to drawings and quickly responding to urgent order needs.

If you require high-quality, high-reliability stainless steel spring strips, please feel free to contact us.