ASTM F15 Kovar Alloy Strip, Ribbon and Sheet
International Equivalent
| Mark | Analogue | W. Nr. | Aisi Uns | En | Order |
|---|---|---|---|---|---|
| 29NK | 1.3981 | K94610 | NiCo29-18 | Availability confirmed on request | |
| 29NK-t | 1.3981 | K94610 | NiCo29-18 | Availability confirmed on request | |
| 29NK-m | 1.3981 | K94610 | NiCo29-18 | Availability confirmed on request |
Kovar strip and ribbon for U.S. buyers
Kovar is commonly requested for iron-nickel-cobalt sealing-alloy applications. ASTM F15 covered UNS K94610 in wire, rod, bar, strip, sheet and tubing; ASTM lists the latest F15 edition as withdrawn in 2024. If a drawing cites ASTM F15, include the exact required edition and obtain purchaser approval for the applicable current specification.
Flat-product and blank requirements
For strip, ribbon or sheet, state thickness, width, coil or cut length, temper or condition, surface, edge, flatness and dimensional tolerances. For Kovar blanks, attach a drawing or dimensional specification and identify cutting allowance and inspection requirements.
Reference data
| Mark | ASTM F 15 | SEW 385 | DIN 17745 |
|---|---|---|---|
| C | ≤ 0,04 | <0,05 | ≤ 0,05 |
| Si | ≤ 0,20 | <0,30 | ≤ 0,30 |
| Mn | ≤ 0,50 | <0,50 | ≤ 0,50 |
| Co | ≈ 17 | 17,0 - 18,0 | 16,0 - 18,0 |
| Ni | ≈ 29 | 28,0 - 30,0 | 28,0 - 30,0 |
| Fe | ≈ 53 | Bal. | |
| Al | ≤ 0,10 | ||
| Mg | ≤ 0,10 | ||
| Zr | ≤ 0,10 | ||
| Ti | ≤ 0,10 | ||
| Al + Mg + Zr + Ti | ≤ 0,30 | ||
| Cu | ≤ 0,20 | ||
| Cr | ≤ 0,20 | ||
| Cr | ≤ 0,20 | ||
| Mo | ≤ 0,20 |
Grade and equivalence review
Trade names, UNS K94610, ASTM F15 and European designations should not be treated as automatically interchangeable. Chemistry, thermal-expansion requirements, condition, dimensions and testing must be compared against the purchaser-approved drawing or specification.
Information required for a quote
Send ASTM F15 and the required edition or another governing specification, Kovar or UNS grade, strip, ribbon, sheet or blank form, dimensions, condition, quantity, testing, material certificate and U.S. delivery ZIP code.
Evek LLC reviews every requirement against the requested grade, specification, form, dimensions and quantity. Stock, production route, origin, minimum quantity, certification, price and compliance are confirmed during quotation; website text is not a stock or suitability guarantee.
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Request a U.S. quote
Evek LLC serves customers throughout the United States. Typical delivery is 2–3 weeks, subject to the material, specification, dimensions, quantity, production route and availability.
Send the complete requirement to Evek LLC and include the U.S. delivery ZIP code.