3J53 / UNS N09902 / Ni Span C-902 Elastic Alloy
3J53 (UNS N09902 / Ni‑Span C‑902) Constant Elastic Alloy
3J53, internationally designated as UNS N09902 or Ni‑Span C‑902, is a premium precipitation‑hardening constant‑elastic precision alloy widely used within the instrumentation and electronics industries. After proper aging treatment, this material achieves elevated elasticity and high tensile strength. Its core advantage lies in a low elastic modulus temperature coefficient across 60‑100¡æ, enabling highly stable elastic output even with temperature fluctuation. The alloy also delivers reliable corrosion resistance against many gaseous and liquid corrosive media.
As an experienced Chinese manufacturer specialising in precision functional alloys, ZYTC Alloy supplies high‑quality 3J53 (Ni‑Span C‑902) strip complying with AMS 5225 and UNS N09902 specifications for global instrument, sensor and precision component customers.
Our available strip dimensions cover thickness ranging from 0.0005 inch to 0.040 inch (0.0127 mm‑1.016 mm), with maximum width reaching 8.0 inch (203.2 mm). Custom temper and size options can be arranged to match customer drawing requirements.
Specifications & International Equivalents
3J53 is recognized under multiple international standards and equivalent designations:
| Country | Designation |
|---|---|
| China | 3J53 (GB/T 34471.2-2017, GJB 3313-1998, YB/T 5256-2011) |
| USA | Ni-Span C-902, UNS N09902, AMS 5221 / 5225 |
| Germany | W.Nr. 1.3918, Ni-Spand |
| UK | Ni-Span C |
| Japan | Sumispan-3, EL-3 |
| France | Elinvax |
| Russia | 42HXT§À |
Applicable Specifications: AMS 5221, AMS 5223, AMS 5225, HS261
Available Product Forms & Dimensions
ZYTC Alloy supplies 3J53 (UNS N09902 / Ni-Span C-902) in multiple product forms:
| Product Form | Thickness / Diameter Range | Width Range |
|---|---|---|
| Strip / Foil | 0.0127 mm (0.0005¡å) and above | Up to 203.2 mm (8.0¡å) |
| Wire | 0.5 ¨C 10.0 mm | ¡ª |
| Rod / Bar | ¦µ10 ¨C ¦µ100 mm | ¡ª |
| Flat Bar / Custom Shapes | Custom sizes available | ¡ª |
Key Dimensional Capabilities:
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Minimum Thickness: 0.0127 mm (0.0005¡å) for precision strip applications
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Width: Up to 203.2 mm (8.0¡å)
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Custom Sizes: Available upon request
All materials are delivered with full mill test reports (MTR) documenting chemical analysis, mechanical properties, and heat treatment records.
Key Material Characteristics
3J53 / Ni‑Span C‑902 integrates multiple functional properties essential for precision component manufacturing.
- Superior constant‑elastic performance: After aging hardening, the alloy maintains consistent elasticity and shape retention under varying temperature and cyclic‑stress working conditions, minimising measurement drift for high‑precision devices.
- Reliable corrosion resistance: Resists attack by common industrial gas, liquid and chemical corrosive environments, extending service life for parts exposed to moderate corrosive conditions.
- Good magnetic performance: Features high magnetic permeability, making it suitable for magnetic sensing and related electronic assemblies.
- Versatile fabrication capability: Supports cold working, hot forming and standard welding processes. It can be stamped, rolled and machined into complex geometries for elastic‑part production.
Applications
Thanks to its balanced elasticity, temperature stability and corrosion‑resistant performance, 3J53 alloy serves diverse high‑precision sectors.
Precision springs Manufacture functional springs for electrical devices, measuring instruments, horological parts and automotive assemblies. The material resists creep, preserving spring force over long‑term service.
Sensors and electronic components Applied for magnetic sensors, spring contacts and magnetic head components. Its stable magnetic‑elastic behaviour supports repeatable sensor signal output.
Precision instruments and meters Used for core elastic elements inside precision balances, optical instruments and electron microscopes. Low thermo‑elastic coefficient guarantees measurement accuracy under changing ambient temperature.
Mechanical and automotive braking components High elasticity plus corrosion tolerance make 3J53 suitable for key elastic parts within automotive and industrial braking systems.
Other mechanical elastic elements Commonly produced as bellows, diaphragms, coil springs, spring washers, sealing rings and valve springs for instrumentation equipment.
ZYTC Alloy Supply Advantages
ZYTC Alloy focuses on production of functional precision alloys including 3J53 Ni‑Span C‑902. We strictly control smelting, cold rolling and aging heat‑treatment processes to stabilise elastic modulus, temperature coefficient and surface quality of finished strip.
Every production batch can be provided with complete material test reports covering chemical composition, mechanical properties and functional‑property verification. We support small‑batch prototype orders as well as volume serial production for instrument OEM manufacturers worldwide.
Whether you require standard‑size off‑the‑shelf strip or custom‑temper material for specialised elastic‑component designs, our technical team can offer material‑selection consultation and reliable product delivery.
3J53 (UNS N09902 / Ni‑Span C‑902) constant elastic alloy stands out for stable modulus over temperature, decent corrosion resistance and favourable magnetic properties. It remains the preferred raw material for diaphragms, bellows, precision springs and sensor elements across instrumentation, electronics and automotive industries. For dependable 3J53 precision alloy strip, ZYTC Alloy is your trusted Chinese supplier partner.
Contact ZYTC Alloy Today
📧 Email: dominic@zytc-steel.com
📲 WhatsApp: +86 13132148618