Origin	China
Model Number	wire,plate,pipe,tube,rod,bar,sheet
Brand Name	kx-alloy

Nilo k/kovar alloy as also known as W.NR 1.398,UNS K94610,AWS 094,ASTM F15,Alloy-F15 therlo,Alloy 12B, UNS K94610 FeNi29Co17,Chinese 4J29.

A Nickel-Iron-Cobalt, controlled expansion alloy containing 29% Nickel.

Its coefficient of expansion (which decreases with rising temperature to

the inflection point), matches the expansion rate of borosilicate glasses

and alumina ceramics.

kovar alloy specification:Plate, sheet, strip, rod, bar, wire, tube.

Looking forward to cooperating with you!

1.Alloy grades and chemical composition consistent with the provisions of table 1

the chemical composition of Kovar(%)
C	P	S	Mn	Si	Cu	Cr	Mo	Ni	Co	Fe
Not more thanï¼Âˆ≤ï¼Â‰
0.03	0.020	0.020	0.5	0.30	0.20	0.20	0.20	28.5ï½Âž29.5	16.8ï½Âž17.8	balance

                                                                               2.The tensile strength of wire in line with the provisions of Table 2

Status code	State	Tensile strengthï¼ÂŒN/mm2
R 1/4I 1/2I 3/4I I	Soft state 1/4 Hard state 1/2 Hard state 3/4 Hard state Hard state	<585 585—725 655—795 725—860 >860

3.Strip tensile strength in line with the provisions of Table 3

Status code	State	Tensile strengthï¼ÂŒN/mm2
R 1/4I 1/2I 3/4I I	Soft state 1/4 Hard state 1/2 Hard state 3/4 Hard state Hard state	<570 520—630 590—700 600—770 >700

4.Alloy average linear expansion coefficient in line with the Table 4                  

Alloy Grades	Specimen heat treatment system	The average linear expansion coefficienta,10-6/ oC
		20-300 oC	20-400 oC	20-450 oC
kovar	In hydrogen atmosphere heated to 900 ± 20 oC, insulation lh, and then heated to 1100 ± 20 oC, insulation 15min, to not more than 5 oC / min rate of cooling to below 200 oC released	-----	4.6-5.2	5.1-5.5*

5.Alloy typical expansion coefficient