Product Description and Application

Alloy 44 is also known as 4J44

Alloy 44 has a certain coefficient of linear thermal expansion over a certain temperature range. It is used to make iron-nickel-cobalt alloy strip, bar, plate and pipe with hard glass matching sealing. It is suitable for electric vacuum devices such as transmitting tube, oscillation tube, ignition tube, transistor, tube seal plug and relay shell.

Process Performance and Requirements

• Product Fusion Process

Vacuum Induction Furnace(VIM) and Electroslag Remelting Furnace(ESR)

• Product Chemical Composition

Alloy 44 Chemical Composition%
C	P	S	Mn	Si	Cu	Cr	Mo	Ni	Co	Fe
Not more than
0.03	0.02	0.02	0.5	0.3	0.2	0.2	0.2	34.2～35.2	8.5～9.5	Rem

• Product Physical Property

Alloy Grade	Sample Processing	Average Linear Expansion Coefficient a/10-6·K-1			State	Tensile Strength
Alloy 44	It was heated to 900± 20℃ in hydrogen atmosphere, hold for 1 hour, then heat to 1100±20℃, hold for 15min, then cool to below 200℃ at a speed of no more than 5℃/min.	200-300℃	20-400℃	20-450℃	M(Soft State)	＜570
		4.3-5.1	4.6-5.2	/	1/2H(Hard State)	590-700
					3/4H(Hard State)	600-770
					H(Hard State)	＞700

• Productive Process

• Professional Customization

Cold-drawn Wire	¢0.3~¢18mm(Delivery in rolls or trays)
Hot-Rolling Wire	¢5.5~¢20mm(Delivery in rolls)
Strip	thickness 0.1~4.5*width 6~350mm(Supply in rolls or straight strips)
Smooth Forged Rod on a Lathe	¢60~350mm,L800-2500mm
Hot-rolled Burnishing	¢20~80mm,L1000-5000mm
Cold Drawn and Burnishing	¢2.5~18mm,L1000-8000mm
Seamless Tube	¢1~275mm,wall thickness 0.2~30,L1000-8000mm

Danyang Kaixin Alloy Materials Co., Ltd. was founded on April 18th, 2007, covering an area of 13500 square meters with a registered capital of 20 million yuan. It is a professional enterprise engaged in independent production,research and development of high performance alloy materials such as precision alloy, high temperature alloy, nickel-based special welding wire, corrosion resistant alloy and so on. It is Jiangsu Province private science and technology enterprise, small and medium-sized technology-based enterprise, employee entrepreneurship base, Zhenjiang Harmony Enterprise, 2017 Jiangsu Top 100 high-tech enterprises with the most growth and 2020 South Jiangsu National Gazelle enterprise in Independent Innovation Demonstration Zone, that meet ISO 9001:2015 Quality management systems Requirements absolutely. Our company has more than 150 employees, including more than 20 research & development personnel and more than 25 management personnel. More than 30 invention patents and utility model patents are existing for reference.

At present, we have cooperated with Beijing Steel Research Institute Nak to establish the "National Steel Material Testing Center - Joint Laboratory" and cooperated with Jiangsu Provincial Science and Technology to establish Zhenjiang Microwave Communication materials Engineering Center and Jiangsu (Kaixin) Nickel-based Superalloy Engineering Technology Research Center.