Ribbon nickel alloy KOVAR

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Product Overview
KOVAR Precision Alloy is a nickel‑cobalt‑iron precision alloy (grade: KOVAR, UNS K94610, W. Nr. 1.3981) engineered for controlled low thermal expansion and reliable glass‑to‑metal and hermetic sealing applications. Supplied in bars, rods, sheets, plates, strips, wires and tubes, it supports standard processing services for industrial component manufacturing.

Key Features

• Factory supply with competitive pricing
• Certified: ISO9001, CE, SGS
• Responsive technical and commercial support (24‑hour reply)
• Payment methods: Telegraphic Transfer (T/T), Letter of Credit (L/C)
• High production capacity (50,000 tons/month)
• Quick delivery with standard export packaging
• OEM/ODM available; samples provided upon request

Application Scenarios

• Hermetic seals and glass‑to‑metal seals
• Semiconductor and electronic packages
• Ceramic packages and precision electronic components
• Precision components requiring controlled thermal expansion

Product Details (table)
Item | Specification
Alloy Or Not | Alloy
Material | Nickel Cobalt Iron Alloy
Grade | KOVAR
UNS No. | K94610
W. Nr. | 1.3981
Equivalent Grade | ASTM F15 / Kovar Alloy
Shape | Bar / Rod / Sheet / Plate / Strip / Wire / Tube
Processing Service | Cutting / Bending / Stamping / Welding / Machining
Nickel Content | 28–30%
Cobalt Content | 16–18%
Iron Content | Balance
Thermal Expansion | Low / Controlled
Elongation | ≥ 30%
Place of Origin | Zhejiang, China
Brand Name | Shuaiyi
Diameter / Width | As your requirement
Thickness | As your requirement
MOQ | 200 kg / Flexible
Standard | ASTM F15
Package | Standard seaworthy package
Sample | Available

Chemical Composition (%)
Element | Content (%)
Fe | Balance
Ni | 28–30
Co | 16–18
Mn | ≤ 0.50
Si | ≤ 0.20
C | ≤ 0.02
Cr | ≤ 0.20
Cu | ≤ 0.20

Technical characteristics / specifications

• Grade: KOVAR
• UNS: K94610
• W. Nr.: 1.3981
• Equivalent standard: ASTM F15
• Base composition: Nickel 28–30%, Cobalt 16–18%, Iron balance
• Available forms: Bar, Rod, Sheet, Plate, Strip, Wire, Tube
• Processing: Cutting, Bending, Stamping, Welding, Machining
• Thermal expansion: Low / Controlled
• Elongation: ≥ 30%
• MOQ: 200 kg (flexible)
• Packaging: Standard seaworthy package
• Samples: Available
• Brand: Shuaiyi