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ATOMFAIR® a large pile of circular metallic 304 and 316L stainless steel conical disc springs on a white background.

304/316L Stainless Conical Springs 15.4×1.1mm ATOMFAIR®

$130.00

Institutional Procurement & Supply Compliance: As a verified US supplier, Atomfair accepts formal institutional Purchase Orders (POs), contract billing schedules, and custom procurement loops for university and national laboratories, and corporate R&D departments globally.

ASTM A240 304/316L stainless steel conical springs, 15.4×1.1mm, spring force 10–50 N, fatigue ≥10,000 cycles. Ideal for CR2032 coin cells. Order now.

SKU: AFMSWZYR763
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Description

ATOMFAIR® 304/316L Stainless Steel Conical Springs

RESEARCH GRADE MATERIAL

Product Overview
Premium 304/316L stainless steel conical springs (15.4 × 1.1 mm) for battery research. Manufactured from high-grade stainless steel compliant with ASTM A240, featuring a spring force range of 10 N–50 N with good self-centering performance and strong anti-buckling capability. The 304 variant offers high mechanical strength and general corrosion resistance, while the 316L variant provides enhanced sulfide/chloride ion corrosion resistance and high-temperature tolerance. Engineered to deliver stable cell internal pressure with fatigue life ≥10,000 cycles, making it ideal for thick electrodes, high-loading batteries, vibration environment testing, and systems requiring precise pressure control. Customizable sizing variants are available upon request. If you require other sizes, models, and materials, please email inquiry@atomfair.com for customization.

ATOMFAIR® 304/316L Stainless Steel Conical Springs
ITEM DESCRIPTION
Product Name ATOMFAIR® 304/316L Stainless Steel Conical Springs
Spring Type Conical Spring
Material Options 304 Stainless Steel / 316L Stainless Steel (Compliant with ASTM A240)
Dimensions (Diameter × Free Height) 15.4 × 1.1 mm (Default)
Model Compatibility CR2032 (Compatible with all CR20 Series Internal Dimensions)
Packaging Specification 1000 Pieces/Pack
Core Performance Parameters Spring Force Range 10 N–50 N
Good Self-Centering Performance
Strong Anti-Buckling Capability
Fatigue Life ≥10,000 cycles
304: General Corrosion Resistant
316L: Sulfide/Chloride Ion Corrosion Resistant, High Temperature Resistant
Optimal Application Scenarios Thick electrodes, high-loading batteries, vibration environment testing, systems requiring precise pressure control
Customization Options For other sizes, models, and materials, please email inquiry@atomfair.com to request customization.

Research-Grade Core Quality Advantages
  • Uniform High-Precision Tolerance Control: All component dimensions strictly controlled within ±0.02 mm, ensuring perfect matching across different batches and components, completely eliminating assembly gaps and uneven pressure issues caused by dimensional errors.
  • Full Material Gradient Coverage: Provides a complete material selection from basic to high-end, allowing flexible selection based on corrosivity, voltage range, and testing precision requirements of your experimental system, avoiding experimental failure due to mismatched consumables.
  • Rigorous Electrochemical Compatibility Verification: All materials have undergone constant potential polarization, cyclic voltammetry, and other electrochemical tests to ensure no side reactions within a -0.5 V to 5.0 V voltage range, guaranteeing no interference with battery performance test results.
  • Standardized Batch Production: Fully automated production and quality control ensures highly consistent product performance within and across batches, effectively reducing experimental systematic errors.

APPLICATION SCOPE: Precision assembly and standardized testing for thick-electrode high-loading batteries, vibration environment testing, and all systems requiring precise pressure control with stable cell internal pressure maintenance under corrosive conditions.
PACKAGING: 1000 pieces/pack. 100% dimensional inspection, spring force calibration, surface quality verification, and appearance inspection before shipment, ensuring oil-free, burr-free, and impurity-free conditions. Can be used directly for battery assembly inside gloveboxes.
IMPORTANT NOTICE: This series is a one-stop assembly solution for coin cells dedicated to electrochemical research. Default accompanying accessories are made of 304 stainless steel. If other materials or special dimensions are required, please email inquiry@atomfair.com for customization.



This series is a one-stop assembly solution for coin cells dedicated to electrochemical research, comprehensively covering the three mainstream models CR2032, CR2025, and CR2016. It provides a full material and specification selection of three core components—positive/negative electrode cases, conductive spacers, and elastic springs. Independent purchase of single components is supported, and pre-matched complete assembly kits are also available. Fully compatible with all cutting-edge research systems, including conventional lithium-ion batteries, sodium-ion batteries, all-solid-state batteries, lithium-air batteries, and high-voltage batteries, it provides standardized hardware support for the accuracy and reproducibility of experimental data.
Important Note: Default accompanying accessories are made of 304 stainless steel. For accessories made of other materials, please email inquiry@atomfair.com for customization.

I. Positive/Negative Electrode Cases
Type Classification Material / Special Structure Compatible Models Core Performance Parameters Optimal Application Scenarios
Basic Universal 304 Stainless Steel CR2032/CR2025/CR2016 Dimensional Tolerance ±0.02 mm
Sealing Pressure ≥5 MPa
Operating Temp. -40°C to 120°C		 Conventional Li-ion/Na-ion batteries, aqueous battery basic testing, batch prototype preparation
Basic Universal 316L Stainless Steel CR2032/CR2025/CR2016 Dimensional Tolerance ±0.02 mm
Sealing Pressure ≥6 MPa
Operating Temp. -40°C to 150°C		 Sulfide solid-state batteries, high-voltage batteries (>4.5 V), long-term cycling tests, highly corrosive systems
High-Performance Coated Aluminum Coated CR2032/CR2025/CR2016 Coating Thickness 5–10 μm
Adhesion ≥5B Grade
Volume Resistivity ≤3×10⁻⁸ Ω·m		 Lightweight batteries, low contact resistance precision testing, systems sensitive to metal ion contamination
High-Performance Coated Titanium Coated CR2032/CR2025/CR2016 Coating Thickness 3–8 μm
Excellent Biocompatibility
Resistant to Strong Acid/Base Corrosion		 Bio-batteries, aqueous zinc batteries, strongly acidic/alkaline electrolyte systems
High-Performance Coated Nickel Coated CR2032/CR2025/CR2016 Coating Thickness 5–12 μm
Excellent Weldability
Atmospheric Corrosion Resistant		 Battery structures requiring tab welding, pilot-scale batch production, routine electrochemical testing
High-Performance Coated Gold Coated CR2032/CR2025/CR2016 Coating Thickness 0.5–2 μm
Contact Resistance ≤1 mΩ
Superior Chemical Stability		 Ultra-precision electrochemical testing, EIS testing, micro-current testing, in-situ characterization
Specialized Research Li-Air Mesh Type CR2032/CR2025/CR2016 Pore Size 0.2–0.5 μm
Waterproof Rating IP67
Uniform Gas Distribution Design		 Lithium-air batteries, lithium-oxygen batteries, gas-involved reaction battery systems
Specialized Research Kapton Window Type CR2032/CR2025/CR2016 Window Thickness 25–50 μm
Optical Transmittance ≥85%
Electrolyte Corrosion Resistant		 In-situ optical characterization, in-situ Raman/IR spectroscopy, in-situ microscopy observation

II. Conductive Spacers
Default Size: Φ15.8 × 0.5 mm, compatible with the internal dimensions of all CR20 series cell cases. Other thicknesses and special sizes are customizable; please email inquiry@atomfair.com for customization.
Material Available Size (Diameter × Thickness) Core Performance Parameters Optimal Application Scenarios
99.5% Industrial Pure Aluminum Φ15.8 × 0.5 mm (Default) Dimensional Tolerance ±0.02 mm
Volume Resistivity 2.7×10⁻⁸ Ω·m
No Electrochemical Side Reactions		 Precision experiments requiring high contact resistance, conventional Li-ion/Na-ion batteries
304 Stainless Steel Φ15.8 × 0.5 mm (Default) Dimensional Tolerance ±0.02 mm
High Mechanical Strength
General Corrosion Resistant		 Most routine testing scenarios, aqueous batteries, low-to-medium voltage systems
316L Stainless Steel Φ15.8 × 0.5 mm (Default) Dimensional Tolerance ±0.02 mm
Sulfide/Chloride Ion Corrosion Resistant
High Temperature Resistant		 Sulfide solid-state batteries, high-voltage batteries, highly corrosive systems, long-term cycling tests

III. Elastic Springs
Default Size: φ15.4 × 0.3 mm, compatible with the internal dimensions of all CR20 series cell cases. Other heights and special sizes are customizable; please email inquiry@atomfair.com for customization.
Spring Type Available Materials Available Size (Diameter × Free Height) Core Performance Parameters Optimal Application Scenarios
Wave Spring (Belleville) Al Coated / 304 SS / 316L SS / Au Coated SS φ15.4 × 1.1 mm (Default) Spring Force Range 5 N–30 N
Large Contact Area
Small Footprint
Fatigue Life ≥10,000 cycles		 Most routine testing, thin electrodes, low-loading batteries; universal preferred choice
Conical Spring Al Coated / 304 SS / 316L SS / Au Coated SS φ15.4 × 1.1 mm (Default) Spring Force Range 10 N–50 N
Good Self-Centering
Strong Anti-Buckling
Fatigue Life ≥10,000 cycles		 Thick electrodes, high-loading batteries, vibration environment testing, systems requiring precise pressure control

IV. Complete Assembly Kit Specifications
Kit Type Included Components Corresponding Battery Model Configurable Options
Standard Assembly Kit Positive Case + Negative Case + Spacer + Spring CR2032/CR2025/CR2016 All materials freely combinable
Spacer thickness customizable
Spring height customizable
Li-Air Dedicated Kit Mesh Positive Case + Negative Case + Waterproof Breathable Membrane + Spacer + Spring CR2032/CR2025/CR2016 304/316L SS material optional
Spacer thickness customizable
Spring height customizable
In-Situ Characterization Kit Kapton Window Cell Case + Gold Coated Spacer + Gold Coated Spring CR2032/CR2025/CR2016 Window thickness optional
Spacer thickness customizable
Spring height customizable

International Quality Standards
  • Stainless steel materials comply with ASTM A240 international standard.
  • Pure aluminum materials comply with ASTM B209 international standard.
  • All coating thicknesses are uniform, with adhesion meeting ASTM B571 standard.
  • 100% dimensional inspection, sealing performance testing, and appearance inspection before shipment.
  • Oil-free, burr-free, and impurity-free; ready for direct use in glovebox battery assembly.
TAILORED SOLUTIONS FOR RESEARCH
Contact our engineering team for technical support or official quotations.
EMAIL: inquiry@atomfair.com
Manufacturer: Atomfair LLC
Brand: ATOMFAIR®

The 316L stainless steel variant provides enhanced sulfide and chloride ion corrosion resistance compared to the 304 variant. Material selection should be based on the chemical environment of the battery cell to prevent degradation.

  • Corrosion Resistance Constraint: The 316L variant should be selected for applications involving sulfide or chloride ion exposure to prevent corrosion.
  • Force Range Constraint: The spring must be operated within the 10–50 N force range to maintain fatigue life exceeding 10,000 cycles.
  • Dimensional Compatibility: The default 15.4 x 1.1 mm dimensions are compatible with CR2032 coin cells and similar CR20 series internal dimensions.

How do the mechanical properties of the 304 and 316L variants compare for battery spring applications?

Both 304 and 316L variants share the same spring force range of 10–50 N and fatigue life of ≥10,000 cycles. The 304 offers high mechanical strength and general corrosion resistance, while the 316L provides enhanced sulfide/chloride ion corrosion resistance and high-temperature tolerance, but both deliver identical force characteristics per ASTM A240 compliance.

Are these conical springs compatible with CR2032 coin cells using thick-electrode or high-loading configurations?

Yes, they are designed specifically for thick electrodes and high-loading batteries. With a spring force range of 10–50 N, self-centering performance, and strong anti-buckling capability, they ensure stable cell internal pressure in CR2032 cells (compatible with all CR20 series internal dimensions). The fatigue life of ≥10,000 cycles supports extended testing under such demanding conditions.

What storage conditions are recommended to preserve the electrochemical compatibility of these stainless steel springs?

The springs are supplied in sealed packaging of 1000 pieces per pack. To maintain their electrochemical compatibility within a -0.5 V to 5.0 V voltage range and prevent surface contamination, store in a clean, dry environment. The 316L variant is resistant to sulfide/chloride attack, but avoiding corrosive atmospheres preserves its enhanced performance.

These stainless steel conical springs deliver uniform high-precision tolerance control and rigorous electrochemical compatibility verification for battery testing, but the default size is limited to CR20 series coin cells and the 304 variant offers only general corrosion resistance, not sulfide/chloride protection.

Positive

  • High-precision tolerance control: All component dimensions are strictly controlled within ±0.02 mm, ensuring perfect matching across batches and eliminating assembly gaps and uneven pressure caused by dimensional errors.
  • Electrochemical compatibility verified: Materials have undergone constant potential polarization and cyclic voltammetry tests to ensure no side reactions within -0.5 V to 5.0 V, preventing interference with battery performance results.

Trade-offs

  • 304 variant limited corrosion resistance: Only the 316L variant provides enhanced sulfide/chloride ion corrosion resistance and high-temperature tolerance; the 304 variant offers only general corrosion resistance, limiting its use in aggressive electrolyte environments.
  • Default size only for CR20 series: The default dimensions (15.4 × 1.1 mm) are compatible only with CR2032 and other CR20 series internal dimensions; other sizes require custom ordering via email.

Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.

To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.

Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).

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