Stainless Steel Spring Strip Coil

Qihong, a leading China manufacturer and supplier, produces the flagship Stainless Steel Spring Strip Coil in-house. With advanced factory equipment and strict quality control, we deliver high-quality, cost-effective coils in 200, 300, 400 series. Thickness 0.03–3.0 mm, width 3–600 mm, adjustable hardness 1/2H–SH. Ideal for automated stamping, electronics, automotive, medical; supports ASTM, JIS, GB standards, stock or custom orders.

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Product Description

As a professional manufacturer and supplier in China, Qihong produces the Stainless Steel Spring Strip Coil in-house. From raw material procurement to precision slitting, Qihong ensures full quality control. Features uniform elasticity, flat profile, customizable finishes; ISO 9001 certified, fully traceable for electronics, automotive, medical, and stamping applications.

Product Features and Advantages

We maintain comprehensive control over the entire process, from raw material procurement through to final slitting; we never misrepresent specifications or compromise on material integrity, ensuring robust and reliable quality. Materials are selected according to specific application requirements: SUS301 offers high work-hardening capabilities, making Qihong, a trusted China manufacturer and supplier, produces the Stainless Steel Spring Strip Coil in-house. From raw material procurement to precision slitting, Qihong ensures full quality control. Features uniform elasticity, flat profile, customizable finishes; ISO 9001 certified, fully traceable for electronics, automotive, medical, and stamping applications. suitable for high-stress spring components; SUS304 features excellent corrosion resistance and formability, making it suitable for applications requiring high hygiene standards; and the SUS420/440 series, once heat-treated, achieves high hardness and exceptional wear resistance, making it perfect for high-wear operating environments.

Our hardness control is precise, with batch-to-batch deviations kept within ±5 HV. Each coil exhibits uniform elasticity, thereby helping clients reduce scrap rates during stamping operations. The strip features a perfectly flat profile—free from waves or edge warping—achieved through the use of 20-roll mills combined with precision leveling processes. Surface finishes are available with a roughness (Ra) of ≤0.1 μm—including 2B, BA, mirror-polished, and brushed options—facilitating smooth stamping operations and extending the service life of stamping dies.

Our quality inspection protocols are rigorously implemented: incoming raw materials undergo spectroscopic verification; production is monitored online throughout the entire process; and finished products are subjected to batch-by-batch hardness and salt spray testing. Our products are ISO 9001 certified; material certificates and RoHS compliance reports can be provided with every shipment. Each coil is stamped with a unique production batch number, ensuring full traceability to the source and guaranteeing reliable after-sales support.

II. Product Parameter Table

Item	Detailed Parameters
Product Name	Stainless Steel Spring Strip Coil (Spring Steel Strip / Clock Spring Material)
Material Grade	201, 301, 304, 316L, 310S, 420J2, 430, 440A, 441, 631, 904L, 1Cr17Ni7, 0Cr18Ni9
Thickness Range	0.03mm – 3.0mm (From ultra-thin foil to medium-gauge strip)
Width Range	3mm – 600mm (Supports precision slitting; tolerance: ±0.05mm)
Hardness Level	1/2H (Half-Hard), 3/4H, H (Hard), EH (Extra-Hard), SH (Super-Hard); Vickers Hardness (HV): 200 – 600
Surface Finish	2B (Matte), BA (Bright Annealed), Mirror (8K/9K Mirror Finish), HL (Hairline/Brushed)
Applicable Standards	ASTM A666, JIS G4313, GB/T 3280, and relevant ISO standards
Customization Services	Supports custom non-standard dimensions, specific hardness levels, surface treatments, and precision slitting

III. Frequently Asked Questions (FAQ)

- Customization Services: We can produce non-standard thicknesses and widths, adjust hardness levels, customize surface finishes, and perform precision slitting. We accept OEM/ODM orders based on provided drawings or samples.

- Quality Assurance: We implement strict quality control throughout the entire production process. Every batch of goods is accompanied by a material analysis report. We support environmental compliance testing, and all batches are traceable to ensure reliable quality.

- Selection Recommendations: For high-stress applications, choose Grade 301; for superior corrosion resistance, choose 304 or 316L; for high wear resistance, choose 420 or 440. For automated stamping processes, we recommend hardness levels ranging from 1/2H to H; for applications requiring high elasticity, choose EH to SH. You may also consult directly with our technical staff for expert guidance on material selection.