Factory Direct: 29HK 4j29 Kovar Strip - Fe-Ni-Co Alloy for Hard Glass Sealing

kovar alloy, ASTM F15, Nilo-K, UNS K94610 (FeNi29Co17), Chinese 4J29

4J29 also known as Kovar alloy.The name Kovar is often used as a general term for Fe-Ni alloys with these particular thermal expansion properties. Note the related particular Fe-Ni alloy Invar which exhibits minimum thermal expansion.

Kovar alloy is a vacuum melted, iron-nickel-cobalt, low expansion alloy whose chemical composition is controlled within narrow limits to assure precise uniform thermal expansion properties. It was invented to meet the need for a reliable glass-to-metal seal, which is required in electronic devices such as light bulbs, vacuum tubes, cathode ray tubes, and in vacuum systems in chemistry and other scientific research. Extensive quality controls are employed in the manufacture of this alloy to ensure uniform physical and mechanical properties for ease in deep drawing, stamping and machining.

Chemical composition
C	P	S	Mn	Si	Ni	Cr	Mo	Cu	Co	Fe
≤
0.03	0.02	0.02	≤0.5	≤0.3	28.5~29.5	≤0.2	≤0.2	≤0.2	16.8~17.8	Bal.

The Mechanical properties of 4j29 / Kovar

Mechanical properties
Коэффициент линейного расширения	Удельное электросопротивление	Плотность	Точка Кюри	Модуль упругости	Теплопроводность
Coefficient of linear expansion	Electrical resistivity	Density	Curie point	Elastic Modulus	Thermal conductivity
α₁(20~200℃)/10-6℃^-1	ρ/(μΩ*m)	ρ/(g/cm3)	Tc/ ℃	E/ Gpa	λ/ W/(m*℃)
4.6~5.2	0.48	8.2	430	138	20.6(100℃)

Shijiazhuang Chengyuan Alloy Material Co., Ltd. is a high-tech enterprise specializing in the production of various alloy materials. It has an advanced and complete production line, including material smelting, surface cleaning, rolling, slitting, and a complete test process. Meet the corresponding quality inspection of different products. The company focuses on the production and supply of various electric heating alloys, expansion alloys, soft magnetic alloys, elastic alloys, high temperature alloys and all kinds of pure metals. The product forms include wire, flat wire, strip, plate, bar, foil, Seamless pipe, wire mesh, powder, etc. can meet the application needs of different customers. The various performance indicators of the product are strictly in accordance with the national standards. If customers put forward non-standard requirements, they can also be implemented by reference. Our products are widely used in heating equipment, machinery manufacturing, electric furnace production, instrumentation, household appliances, mineral mining, aerospace, petroleum and nuclear power and other industries, and have received good market feedback. Our products have stable delivery time, excellent quality, sophisticated packaging, and high repurchase rate. They are not only widely recognized in the domestic market, but also have a good reputation in the international market.

* OEM manufacturer * We will deliver the goods to the warehouse of the customer's agent in any city in China. * Terms of delivery: EXW, FCA, FOB, CIF, CPT, DAP * Mode of transport: Sea, Auto, Railway, Air and Express * Payment terms: Bank Transfer, Western Union, PayPal, Alipay * Quality Certificate: In order to improve the quality of products and services, with each order we provide a quality certificate for goods, which includes measured data - chemical composition, electrical resistivity, tensile strength, elongation, melting number, etc. Cheng Yuan Alloy Material Co., Ltd Email: [email protected] Tel .: +86 13673186216 +86 311 8803 3197