Iron-nickel-cobalt Alloy

Model:	4J29
Brand:	KX-Alloy
Origin:	Made In China
Category:	Metallurgy , Mining & Energy / Metallurgy & Mining / Non-ferrous Metal Alloy
Label:	ASTM F15 , Kovar , Nilo K
Price:	US $26.7 / kg
Min. Order:	50 kg

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Product Description

Alloy grades and chemical composition consistent with the provisions of table Ⅰ

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

The tensile strength of wire in line with the provisions of Table Ⅱ

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

Strip tensile strength in line with the provisions of Table Ⅲ

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

Alloy Grades

Specimen heat treatment system

The average linear expansion coefficient

a,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

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4.6-5.2

5.1-5.5

Alloy average linear expansion coefficient in line with the provisions of Schedule IV

Alloy typical expansion coefficient

Alloy Grades

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

20-200

20-300 oC

20-400

20-450

20-500