Hardened Stainless Steel Spring Strip

Hardened stainless steel spring strip is a cold-rolled tough steel material. It is mostly made for elastic parts that bend repeatedly. Located in Ningbo, we temper every steel coil in stable production conditions. This keeps steady hardness, good bending performance and longer fatigue life. Compared with ordinary stainless strips, our hardened steel maintains good elasticity under continuous force. It is a trustworthy material for precision shrapnel and small spring components. We have complete in-house rolling lines and testing machines. Every production batch is checked carefully on dimension, surface condition and hardness. We never use low-grade raw materials to cut costs. For us, stable quality and high precision always come first for industrial buyers.

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Product Description

Our Hardened Stainless Steel Spring Strip stock multiple stainless steel grades to fit different working environments. All raw materials are strictly screened with stable chemical composition and low impurities. Below are our most commonly used grades for spring strips:

301 Stainless Steel: Our best-selling spring grade. It offers strong tensile strength and great elasticity, ideal for parts with frequent deformation.
304 Stainless Steel: Balances elasticity and rust resistance. Suitable for daily humid and weak corrosive working environments.
316L Stainless Steel: Contains molybdenum for better acid and alkali resistance. Widely used in marine and chemical equipment.
420/430 Stainless Steel: Hard and wear-resistant, commonly used for durable elastic structural parts.
631 Stainless Steel: Extra strength after heat treatment, customized for aerospace and high-precision instruments.
We can adjust hardness between HV 350 to HV 600. Full hard, extra hard and ultra-hard tempers are all in stock. Just tell us your processing needs.

Core Product Features

Stable Hardness & Elasticity: Our rolling process avoids uneven hardness. The steel keeps stable shape even after long-time repeated use.
Clean & Smooth Surface: Polished and brushed surfaces are available. No scratches, no oxidation marks and no sharp burrs, easy for stamping and cutting.
Strict Dimension Control: Thickness tolerance is kept within ±0.01mm. We offer narrow slitting for tiny precision parts.
Great Anti-Rust & Wear Performance: Works well in damp, salty and mildly corrosive places, extending component service life.
Easy for Further Machining: The hardened strip can be stamped, bent, cut and welded, fitting mass production perfectly.

Wide Application Range

Our hardened spring steel strips cover a wide range of industries. We serve global clients with both standard goods and custom processed parts:

Electronic accessories: Metal shrapnel, precision spring, conductive elastic sheet
Automotive parts: Automotive elastic fasteners, sensor shrapnel, sealing spring strips
Hardware tools: Stainless steel gaskets, clamping strips, wear-resistant elastic components
Medical & instrumentation: High-precision elastic structural parts resistant to corrosion
Daily industrial products: Stainless steel tension strips, fixed elastic strips

Qihong Production & Testing Advantages

We are a professional stainless steel factory based in Ningbo. Rolling, processing and quality testing are all finished in our own workshop. We test every steel coil strictly on hardness, tensile strength, surface finish and size before delivery.

Custom orders are warmly welcomed. We adjust thickness, width, hardness, surface finish and shapes as required. Whether you need small sample pieces or bulk container orders, we maintain steady quality and acceptable delivery time.

Technical Specifications & Processing Parameters

We list our actual production parameters in the table below. Simple and clear for your purchasing reference:

Item	Technical Specification
Thickness Range	0.05mm - 3.0mm
Slitting Width	5mm - 1250mm (custom narrow slitting)
Tensile Strength	1100MPa - 2100MPa
Hardness	HV350 - HV600
Flatness Tolerance	≤0.03mm/m
Thickness Tolerance	±0.01mm
Surface Finish	2B, BA, No.4, Brushed, Mirror
Material Temper	Full Hard / Extra Hard / Ultra HardEach steel strip will go through stress relief treatment after cold rolling. This step removes internal stress, so the steel will not warp or crack during stamping. Good flatness effectively reduces defective rate on automatic production lines.

Temperature Resistance & Service Limitations

Different grades fit different temperature environments. 301 and 304 work fine from -20℃ to 250℃. 316L stays stable at low temperature. If you need high-temperature resistance up to 950℃, choose 310S. We suggest suitable materials according to your actual working conditions.

Common Pain Points & Our Solutions

Most steel buyers face common troubles: uneven hardness, sharp edges, ocean rust and short service life. We solve these real industry problems with practical methods. Online hardness testing guarantees consistent quality. Imported slitters create smooth edges. Vacuum anti-rust packaging protects coils during sea shipment. High-purity raw materials improve fatigue resistance greatly.

Surface Treatment & Custom Processing

Apart from common surface finishes, we also provide passivation, annealing, edge rounding and fine polishing. Rounded edges avoid machine jamming during stamping. Passivation boosts corrosion resistance without changing hardness. We also offer coil splitting, fixed-size cutting and blanking for deep processing orders.

Industry Certification & Quality Assurance

Our spring steel strips comply with ASTM, JIS and EN standards. Every batch comes with complete MTR documents, including chemical composition and mechanical test data. From raw material inspection to final packaging, we stick to strict quality control for every shipment.

Logistics & Cooperation

We use export-grade waterproof packaging to prevent oxidation and extrusion damage during long-distance transportation. With stable global logistics, we ship goods to ports worldwide safely. We focus on long-term honest cooperation with overseas manufacturers and traders. Custom selection, processing service and technical support are all available.