Alloy 4J32 Super-Invar Expansion Precision

Model NO.: invar


Technique: Customize


Trademark: ToLand Alloy


Origin: Jiangsu Danyang




Standard: AISI, ASTM, DIN, JIS, GB, BS


surface: bright and soft


Specification: customize


HS Code: 7505220000


Product description:



4J32 expansion alloy, also known as super-invar alloy, has been the metal of choice for low expansion applications for years.

"Super-Invar" (31% NI-5% Co-Balance Iron) has found some favor because it has an almost zero coefficient of thermal expansion over a limited temperature range. The useful range of "Super Invar" is limited between -32º Cto + 275º C. Because the material begins to transform from Austenite to Martensite at temperature below-32º F.





Melting Range: 1430~1450º C

Density: 8.10g/cm³

Curie Temperature: 220º C

Typical expansion character(10 -6 / ºC )
Temperature range	20~60	20~50	20~100	20~150	20~200	20~250	20~300	20~400	20~500	20~600
Expansion coefficient	-0.90	0.5	0.9	1.4	2.0	3.2	4.9	7.7	9.6	10.8

Varieties		Steel type Specifications mm	Precision alloy	Resistance Alloys for electrical heating	Super alloy	Welding Wire	Corrosion resistant alloy
Rods	hot rolling rods	Φ8~38mm	available		available		available
	Cold-drawn rods	≤50mm	available		available		available
	Forged rods	Φ38~350mm	available		available		available
Wires	Round wires	Φ0.3~8mm	available	available	available	available	available
	Non-circle wires	Negotiation	available		available		available
Strips	Cold rolling	0.15~4×200mm	available	available	available		available
	Hot rolling	4~22×200mm	available	available	available		available
Plates	Cold rolling	0.5~4×1000×2000mm	available		available		available
	Hot rolling	4~22×1000×2000mm	available		available		available
tubes		Φ4~63×0.5~5mm			available		available
Executive standard: GB, GJB, HB, YB, ASTM, AMSE, negotiation and so on.

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