3J21 Cobalt-Based Elastic Alloy Wire
3J21 Cobalt-Based Elastic Alloy Wire (product code PT-XHA-PRA-00036) is listed under Industrial Products & MRO > Special Alloys > Precision Alloys and supplied in Singapore by PANDA COLLECTIONS (PANDATEC PTE. LTD.), a B2B procurement partner for businesses. A 40 % cobalt elastic alloy that combines non-magnetic behaviour, corrosion resistance and very high elastic strength. Prices are quoted on request.
| Product code | PT-XHA-PRA-00036 |
|---|---|
| Category | Industrial Products & MRO > Special Alloys > Precision Alloys |
| Grade / designation | GB/T 15018 3J21 (Co40NiCrMo) |
| Product form | Wire |
| Applicable standards | GB/T 15018, YB/T 5253 (confirmed per order) |
| Available forms | Wire, strip, plate, forged bar |
| Certificates | EN 10204 3.1 MTC on request |
| Minimum order | On request |
| Country of origin | China |
| Pricing | On request – customised quotation by PANDA COLLECTIONS |
| Supplied in | Singapore |
Product description
A 40 % cobalt elastic alloy that combines non-magnetic behaviour, corrosion resistance and very high elastic strength. PANDA COLLECTIONS sources 3J21 for buyers in Singapore and internationally for project and bulk orders. Mill test certificates to EN 10204 3.1, full heat traceability, melting route (e.g. ESR/VAR), heat-treatment condition and NDT/testing requirements are confirmed per enquiry. Prices are not listed online; every order is quoted individually based on grade, dimensions, quantity, testing and certification requirements.
Technical data
| Chemical composition (%) | Co 39–41, Cr 19–21, Ni 14–16, Mo 6.5–7.5, Mn 0.3–0.6, Si 0.15–0.3, C ≤0.03, Fe bal. |
|---|---|
| Mechanical properties | Solution treated: Rm ≥700 MPa, A5 ≥35 %; cold-drawn wire Ø0.2–5.0 mm: Rm 1275–1865 MPa (grade A/B) |
| Physical properties | Density 8.4 g/cm³; melting range 1372–1405 °C |
Typical applications
- Non-magnetic springs and elastic elements
- Taut-band and hair-springs for precision instruments
Industries: Instrumentation, Aerospace, Medical Devices
Updated October 27, 2026
Frequently asked questions
What is 3J21 used for?
Non-magnetic springs and elastic elements, taut-band and hair-springs for precision instruments.
Which standards apply to 3J21?
GB/T 15018, YB/T 5253. Compliance, testing and certificates are confirmed for each order.
What forms and sizes of 3J21 are available?
Wire, strip, plate, forged bar. Sizes are cut or produced to order.
How do I get a price for 3J21 Elastic Alloy Wire?
Prices are not published. Request a customised quotation from PANDA COLLECTIONS with the product code PT-XHA-PRA-00036, size, quantity, testing and certificate requirements, and delivery address.
Can mill test certificates be provided?
Mill test certificates to EN 10204 3.1 with heat traceability can be requested. Melting route (e.g. ESR/VAR), heat-treatment condition and NDT requirements are confirmed per enquiry.
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