Nickel Iron Alloy 42/ Nilo 42 (ASTM F30)

Technical Data Sheet

Alloy 42 (Nilo 42) is a nickel-iron controlled-expansion alloy containing 42% nickel. Alloy 42 (Nilo 42) has a low and normally constant coefficient of thermal expansion from room temperature to about 300ºC (570ºF). Alloy 42 (Nilo 42) is used for semiconductor lead frames in integrated circuits, bi-metal thermostat strip, thermostat rods, for ceramic-to-metal seals with alumina ceramics, and various glass-to-metal seals such as the core of copper-clad-wire for sealing into glass envelopes of electric bulbs, radio valves, television tubes and fluorescent lights.

Chemical Composition Limits
Weight%	Ni	C	Mn	P	S	Si	Cr	Al	Fe
Alloy 42 Nilo 42	41 min	0.05 max	0.80 max	0.025 max	0.025 max	0.030 max	0.250 max	0.10 max	Rem

Typical Mechanical Properties

Material	Condition	Tensile Strength	Yield Strength (0.2% Offset)	Elongation (%)
psi	MPa	psi	MPa
Alloy 42 (Nilo 42)	Annealed	71,000	490	36,000	250	43

Availability
Alloy 42 (Nilo 42) is available in Sheet, Bar, Plate and Wire. For all stock availability contact Sales.

Stock Sizes TK X Width X Length	Coil	Sheet	Foto Etching & Chemical Milling Quality	Coil Lead Frame or Deep Draw	Hot Rolled Plate TK X Width X Length
0.005 x 16	yes	yes	yes	yes	0.250+ x WI x 0.375+ x WI x 0.625 + xWI x Master Plates cut to size Shearing Sawcutting Flame Cutting
0.006 x 16	yes	yes	yes	yes
0.0075 x 16	yes	yes	yes	yes
0.008 x 16	yes	yes	yes	yes
0.010 x 16	yes	yes	yes	yes
0.015 x 16	yes	yes	yes	yes
0.020 x 24 x 72	yes	yes	yes	yes
0.030 x 24 x 72	yes	yes	yes	yes
0.040 x 24 x 72	yes	yes		yes
0.061 x 24 x 72	yes	yes		yes
0.080 x 10	yes			yes
0.100 x 24 x 72		yes
0.125 x 16 x 72		yes

Many other sizes and forms available Alloy 42 Bar, Alloy 42 Plate, Alloy 42 Sheet, Alloy 42 Strip, Alloy 42 Wire

Specifications
UNS: K94100
Werkstoff Nr. 1.3917
ASTM F29 Wire
ASTM F30 Sheet, Strip, Rod, Bar, Tubing, Wire
B753 Sheet and Strip
SEW 385 Sheet, Strip, Bar
DIN 17745
AFNOR NF A54-301
Tradename Nilo 42