Kovar® Strip, Ribbon and Sheet — ASTM F15 / 1.3981
International Equivalent
| Mark | Analogue | W. Nr. | Aisi Uns | En | Order |
|---|---|---|---|---|---|
| 29NK | 1.3981 | K94610 | NiCo29-18 | Delivery from the stock, in stock | |
| 29NK-t | 1.3981 | K94610 | NiCo29-18 | Delivery from the stock, in stock | |
| 29NK-m | 1.3981 | K94610 | NiCo29-18 | Delivery from the stock, in stock |
Technical Characteristics
Alloy alloyed with nickel and cobalt has a minimum LCTR. The alloy has twice the electrical resistance compared to invar. The material contributes to making the strongest possible sealed joints with glass. In the 19th century, nickel alloys were very rare. Today, they are used in many applications.
| 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 |
Sheet and strip production
Nickel is very ductile and therefore often used in the production of ultra-thin sheets. Tape grade 1.3981 is produced in lengths of up to 100 m by cold rolling. Ribbons of maximum length are allowed to have seams in accordance with GOST.
Scope of application
Medicine, power engineering, industrial chemistry, research laboratories of physics and chemistry. Aircraft construction, automotive industry. Since kovar has a high level of resistance, for electrical equipment use very thin tapes with a maximum thickness of 20 microns.
Supply and delivery
Evek LLC supplies Kovar strip, ribbon and sheet for U.S. customers. Request the required grade or standard, thickness, width, length, temper, tolerance and quantity. If you need blanks cut from strip or sheet, attach a drawing or dimensional specification for review.
Request a quote
Include the delivery ZIP code and required documentation in your request. Typical delivery across the United States is 2–3 weeks, subject to product availability and order specifications.