Kovar wire

Related Categories:Steel Wire

Product Detailed

kovar wire specification:0.20-8mm.
Cold drawn state,soft or hardness.
bright and shining
coil packing
Major manufacturers

Note: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 than≤
0.03	0.020	0.020	0.5	0.30	0.20	0.20	0.20	28.5~29.5	16.8~17.8	balance

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

Status code

State

Tensile strength,N/mm2

1/4I

1/2I

3/4I

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 strength,N/mm2

1/4I

1/2I

3/4I

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 coefficient a,10-6/ oC

20-

300oC

20-

400oC

20-

450oC

kovar

In hydrogen atmosphere heated to 900 ± 20 oC, insulation 1h, and then heated to 1100 ± 20 oC, insulation 15min, to not more than 5 oC / min rate of cooling to below 200 oC released.

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4.6-5.2

5.1-5.5

5.Alloy typical expansion coefficient

Alloy Grades

The average linear expansion coefficient a,10-6/ oC

20-200oC

20-300oC

20-400oC

20-450oC

20-500oC

20-600oC