48 Alloy

Description

48 ALLOY is A controlled expansion alloy, consisting of 48% Nickel, balance Iron; used in a variety of electronic application, especially for glass and ceramic seals.

Application

Glass to metal seals for variety of electronic tubes and hermetic devices.

parameter

Cross Reference:

Russia	USA	UK	France	ISO
H47X	Fe-Ni alloy 48	N48	N485/N48	FeNi48

Typical chemistry:

C	P	S	Mn	Si	Ni	Fe
≤					Ni	Fe
0.05	0.020	0.020	0.40	0.30	48.0---51.0	Balance

Typical Average Coefficient of Linear Expansion:

30-100℃	30-200℃	30-300℃	30-400℃	30-500℃	30-600℃	30-700℃
9.4	9.4	8.8	8.2-9.2	9.4	10.4	11.3

Typical Physical Properties:

Density	lb/cu in	0.298
Specific Gravity		8.25
Curie Temp	°F	880
Curie Temp	°C	471
Melting Point	°F	2600
Melting Point	°C	1427
Electrical Resistivity	Micro-ohm-cm	49
Electrical Resistivity	ohm-cir mil/ft	290
thermal Conductivity	W/cm °C	0.13
thermal Conductivity	BTU-in/sq. ft-hr-	90
Specific Heat	Cal/g- °C	0.12
Specific Heat	BTU/lbm- °F	0.12
Thermal Expansion	ppm / °F (75°F to 842°F)	5.0
Thermal Expansion	ppm / °C (25°C to 450°F)	9.0

Typical Mechanical Properties :

Elongation	% in 2 in.	30
Typical Hardness Ann	Rockwell HRB	80
Tensile Strength	ksi	79
Tensile Strength	MPa	545
Yield Strength	ksi	36
Yield Strength	MPa	248
Modules of Elasticity	ksi	23
Modules of Elasticity	MPa	159

Size Range

Sheet	Thickness:0.10mm~3.50mm, width: ≤300mm
Plate	Thickness:3.5mm~40.0mm, width: ≤500mm
Round wire	Thickness:0.10mm~5.0mm
Flat Wire	Dia 0.5mm~Dia 5.0mm, length≤1000
Rod	Dia 5.0mm~Dia 8.0mm, length≤2000
	Dia 8.0mm~Dia 32.0mm, length≤2500
	Dia 32.0mm~Dia180.0mm, length≤1000
Capillary	OD 8.0mm~1.0mm,ID 0.1~8.0 length≤2500
Pipe	OD 120mm~8.0mm,ID 8.0~129 length≤4000